Cdo change dimension name. cdo setattribute,time@long_name='time' 1901_fina.

Cdo change dimension name The function nc_def_dim () adds a new dimension to an open netCDF dataset in define mode. 7 It looks like CDO changes dimension names after regridding. nc Christopher Lynnes - 2012-06-15 Hi Ralf, It worked!!! Thank you! I updated both cdo and nco and needed to change IGNORE_ATT_COORDINATES back to 0 (and of course rename both variable and dimension "month" to "time" - previously I was only updating the dimension and missed the fact that variable disappeared after that). , x and y also do not show up. nc ncrename -v old,new # Rename var from ‘old’ to ‘new’ ncrename -d old,new # Rename dimension ncrename -g old,new # Rename group ncrename -v /grp/old,new # Rename var in group ncrename -a old,new # Rename global attribute ncrename -a var@old,new # Rename attribute of var Aug 22, 2024 · We are also having some problems opening the new ERA5 NetCDF using grads and cdo, it seems to me that the added variables and the change in time dimension make the file unredable in these programs. Apr 6, 2025 · Applies to: [!INCLUDE fabric-se-and-dw] [!INCLUDE dimensional-modeling-series] This article provides you with guidance and best practices for loading dimension and fact tables in a dimensional model. In steps 6 and 7, i had to use CDO- i could not figure out the NCO equivalents. 2 from scratch but got the same issue. Fortunately, you can do this to fix the latitude: ncks --fix_rec_dmn lat output. dimensions: lat = UNLIMITED ; // (34 currently) lon = 42 ; time = 360 ; float precip(lat,lon,time) ; precip:_FillValue = 1. nc: XDim\:EOSGRID YDim\:EOSGRID After regridding MAT3CPMST_remap. It successfully removes the key-value pair in the dimensions OrderedDict but the name is still "registered" with the netCDF Dataset What's the call order to delete Dataset dimensions and variables? Jan 25, 2024 · Many things (running means, EOF, conversions, etc) can now be done using the cdo operators. net Hi all, I used this "chname" to change the name of one of my variables and it worked. nc outfile would be practical, but doesn't work. The command runs with no errors or warnings. I would like to change standard_name and long_name with NCO. nc test. You want to change the attribute with the name name. txt infile outfile E. nc: dimensions: time = UNLIMITED ; // (360 currently) latitude = 128 In this case t or time is a dimension, which cannot be changed manually with cdo. I made a new file and appended everything together: dimensions: lon = UNLIMITED ; / We would like to show you a description here but the site won’t allow us. For example when I try to select one level I get: cdo -sellevel,1 myfile. 8. hth ralf Work with netCDF files On this page we provide some useful information about working with data files in netCDF format. nc < 2001_2 I have a bunch of netCDF files, all monthly means of some 3D fields, in which the time dimension was not stored correctly so that I cannot process the files with CDOs (or NCOs). It provides practical guidance for [ [!INCLUDE fabric-dw] in Microsoft Fabric] (data-warehousing. Before regridding MAT3CPMST_subset. The dimensions in my file are in (lengthd,time, langitude, latitude) order like: lengthd = 10 time = 12 (UNLIMITED) longitude = 720 latitude = 360 I need them in (longitude, latitude, time,length) order. At the end, the temp variable should be something like following. Jan 7, 2022 · I calculated the potential temperaure from a NetCDF file. Cdo timmean adds an extra time dimension when doing a time average Added by Ashwin D over 5 years ago Sep 6, 2019 · The dimensions of the netCDF file are accessed with ds. I checked the file info with ncdump -h inputfile. nc and t2. Jul 21, 2005 · In dialog box pick Dimension Text tab. Renaming dimensions does not affect the values stored in the lat and lon variables, so your statement that it changed the range of lat and lon makes no sense to me. Currently, CDO doesn't support generic dimension names such as depth. Furthermore, the variable dimensions should be (time,lat,lon) or (time,lev,lat,lon). I actually selected a 4 grid square section for 3 days only from a very large NetCDF file that has 20 years data at hourly time-step. But the following command didn't work. Unfortunately, the model requires the netcdf time dimension to have long_name="time". Usage ncvar_rename( nc, old_varname, new_varname, verbose=FALSE ) Arguments Jan 15, 2023 · How can add variable name and units to NetCDF attribute in NCO. nc File format : netCDF -1 : Institut Source Ttype Levels Num Points Num Dtype : Parameter name RedmineHi Brandan, Thanks for looking into this. nc fout_123. nc dataset. e. With an example, when using the following cdo command -setreftime,'1850-01-01','00:00:00' The time unit in the cdo remapcon (Abort): Source grid cell corner coordinates missing! So i thought to do a sellonlatbox,4,20,-59,-50 of the larger (output) grid, but it gives me cdo sellonlatbox (Abort): Longitudinal dimension is too small! Dec 1, 2015 · none of you coordinates variables (west_east,south_north,XLAT,XLON) has CF-conform attributes like long_name, standard_name or unit. When I output the resulting sum or mean as a netcdf, it creates a netcdf-classic (netcdf3) with one unlimited dimension. nc" tas@coordinates="lat lon" tas@units="degC" How to change the calendar along with date? or to just displayed name can be change with below command? Format of the calendar has been already changed with above command or not? When the variables have the right dimension order (if not do the step from above) you have to append each dimension step by step to a new file, and at the end append all variables, too. What did you expect to happen? How to add "time" dimension? Command-line operators for netCDF and HDF files Hello, I want to add time axis to monthly netcdf files which have longitude,latitude, and a variable called Band1. nc merged. If you replace depth with lev (level), it should work. you use the coordinates attribute for WS correctly, but since the XLON and XLAT have not meta information, CDO does not identify them as valid coordinate variables. nc ncrcat ¶ Concatenate several time slice to one timeserie. I try to insert the plon plat in my data file using ncks. Jun 9, 2016 · For example, I have a float AOT variable, how would I change the name so it became a float AOD? I know how to change the names of dimensions, but I cannot find anywhere that describes how to change the variable itself. I know this can be quite easily be changed after downloading, but would it not be possible to rename it back to time for user convenience? For me the most convenient rename method is using the netCDF4 api (cdo cannot be assumed to be available on all systems where my package runs): nc CDO v1. which I cannot do easily otherwise. anyone can help me!!!! find below the information of my data. >> But I want to change the dimension's name in the nc file. I am new using cdo, so I do not know if there is a way to match the dimension of these files using cdo? In step 2, the units long_name attribute gets appended to what pre-existed, instead of replacing. nc < 2001_1. Change the default dimension name and enter a description. 5 I have some ECMWF runoff ensemble GRIB files which I an converting to netcdf and the order of the dimensions is not what I need but I can't figure out how to reorder them. 6k次，点赞23次，收藏15次。整理一下平时经常会使用的cdo命令。_cdo命令 Hello, When I try to convert a grib file from the DWD opendata repository via remap using CDO-2. Here's what I wish to do: Change variable "zaxis = 1, 2, 3;" to "zaxis = 0. nc No interpolation is involved, it should simply change the longitude coordinate. For those systems for which they're provided, by far the easiest way to install CDO is to use a package manager, since these will also automatically install any other libraries CDO needs (its dependencies). Its dimensions need to be renamed as albedo (north_south, east_west). I have tried the following code: cdo -setreftime,1900-01-01,00:00:00,1day \ -settaxis,1901-01-01,12:00:00,1month \ -setcalendar,standard \ out1. Is there a way to change the name while keeping all the variables from the original file? Thanks! Is it possible to change or manuplate variable dimension? In my case, i have a variable like following. The dimension is added to the Shared Library. nc file, from 'latitude' to 'lat' and from 'longitude to lon', to later be able to combine it with another . nc I downloaded all the files once again with the same specifications, but exactly at the month 12 these dimensions change. Therefore it can be necessary to convert an absolute into a relative time axis. by having the dimension order be TIME, X, Y. nc pop2 Nov 25, 2021 · I want to reanme the dimensions of a . I tried the following: ncpdq -a -longitude,latitude,time,lengthd f1. nc I get this error: ncdump: merged. To change the units of a variable use the setattribute operator. nc Warning (cdf_set_dim): Inconsistent dimension definition for veget! dimid = 0; type = 4; newtype = 3 Warning (cdf_read_mapping_atts): Text attribute crs:grid_mapping_name missing! Jeisson Javier Leal Rojas wrote in RE: Remove a Variable from a nc file: Dear Estanislao, [] Do you happen to know why delname or selname did not work? selname and delname like most other operators work on data variables. Even I did that too and got two output where in dimension section 'expver' shows 1 for both the outputs (t1. Dataset in order to change the dimension order to make it cf-compliant, e. Every old name must exist in the input file, unless the name is preceded by the character . Any way, it is would be better that cdo -copy did exactly what is expected: to copy a netcdf file without constraints on the attributes! Apr 6, 2025 · This article provides you with guidance and best practices for designing dimension tables in a dimensional model. Here an example to change the attribute name of the variable blht: ncatted -a name,blht,o,c,"atmospheric_boundary_layer_thickness" ifile ofile Best If I change a coordinate variable the dimension is also being renamed, and, likewise, if I change the dimension name, also the coordinate variable will be renamed. nc RedmineHello, I have a question about reordering the dimensions with ncpdq. 首席数据官，英文全称是 Chief Data Officer，简称 CDO。 “首席”可以理解为在一个组织中居于高级管理层级；“数据”意味着 CDO 管理的对象是数据，负责组织的数据及其价值实现；“官”则是能够承担领导责任的复合型数据专业人才。 首席数据官 (Chief Data Officer、CDO) 是指熟悉国内、国际数据安全合规政策，具备数据安全体系搭建能力，熟练掌握数据安全管理流程及数据安全技术保护措施的专业技术人才。 Apr 14, 2022 · 企业CDO： Gartner指出，CDO是公司高级管理人员，其负责企业级数据和信息战略、治理、控制、政策制定和有效利用，具体职责将包括信息保护和隐私、信息治理、数据质量和数据生命周期管理的责任，以及利用数据资产创造业务价值。 什么是首席数据官 (CDO)？ 首席数据官（CDO）是负责从企业 数据 中获取最大商业价值的管理人员。 CDO 通常负责制定组织的数据战略，并监督 数据管理 职能，例如 数据治理 、数据质量、 数据分析 和 数据安全。 Jun 26, 2024 · 在此背景下，首席数据官（Chief Data Officer，以下简“CDO”）制度应运而生。 数字化转型浪潮下，“数据”就是新的石油。 有机构预测，2022年，90%的企业将把数据信息纳入企业发展战略，并作为一项关键的企业资产进行管理。 Oct 18, 2023 · 在科技的驅動下，愈來愈多公司將資源或重心轉往數位領域，包括在數位媒體投放廣告、用大數據找出顧客輪廓等。 為此，組織也相應地出現新的職位，其中「數位長」（CDO，Chief Digital Officer）就是一例，被賦予帶領公司數位轉型或擬訂相關策略的職責。 Mar 5, 2025 · 截至目前，包括北京、上海、广东、浙江、江苏在内的十余个省份（自治区、直辖市）已陆续发布首席数据官（CDO）制度建设相关政策文件。 Jul 10, 2025 · 数据成关键生产要素，但存在散乱等问题，首席数据官（CDO）制度应运而生。 文章介绍CDO定义、职责、有效用数方法及所需能力，还提及数据科学家，强调企业数字化转型的重要性。 担保债务凭证（Collateralized Debt Obligation，简称CDO）是以抵押债务信用为基础，通过资产证券化技术对债券、贷款、保费及CDS费用等资产进行结构重组形成的固定收益证券。 通过首席数据官（CCRC-CDO）认证，证明持证人员具备为数据进行管理、分析、建模和可视化的能力；可以利用数据决策、数据治理、数据资产运营的基本工作方法和技术工具开展全面高效的数据治理及数据价值挖掘工作，从而协助组织提升数据驱动决策水平和 首席数据官，英文全称是 Chief Data Officer，简称 CDO。 “首席”可以理解为在一个组织中居于高级管理层级；“数据”意味着 CDO 管理的对象是数据，负责组织的数据及其价值实现；“官”则是能够承担领导责任的复合型数据专业人才。 首席数据官 (Chief Data Officer、CDO) 是指熟悉国内、国际数据安全合规政策，具备数据安全体系搭建能力，熟练掌握数据安全管理流程及数据安全技术保护措施的专业技术人才。 Apr 14, 2022 · 企业CDO： Gartner指出，CDO是公司高级管理人员，其负责企业级数据和信息战略、治理、控制、政策制定和有效利用，具体职责将包括信息保护和隐私、信息治理、数据质量和数据生命周期管理的责任，以及利用数据资产创造业务价值。 什么是首席数据官 (CDO)？ 首席数据官（CDO）是负责从企业 数据 中获取最大商业价值的管理人员。 CDO 通常负责制定组织的数据战略，并监督 数据管理 职能，例如 数据治理 、数据质量、 数据分析 和 数据安全。 Jun 26, 2024 · 在此背景下，首席数据官（Chief Data Officer，以下简“CDO”）制度应运而生。 数字化转型浪潮下，“数据”就是新的石油。 有机构预测，2022年，90%的企业将把数据信息纳入企业发展战略，并作为一项关键的企业资产进行管理。 Oct 18, 2023 · 在科技的驅動下，愈來愈多公司將資源或重心轉往數位領域，包括在數位媒體投放廣告、用大數據找出顧客輪廓等。 為此，組織也相應地出現新的職位，其中「數位長」（CDO，Chief Digital Officer）就是一例，被賦予帶領公司數位轉型或擬訂相關策略的職責。 Mar 5, 2025 · 截至目前，包括北京、上海、广东、浙江、江苏在内的十余个省份（自治区、直辖市）已陆续发布首席数据官（CDO）制度建设相关政策文件。 Jul 10, 2025 · 数据成关键生产要素，但存在散乱等问题，首席数据官（CDO）制度应运而生。 文章介绍CDO定义、职责、有效用数方法及所需能力，还提及数据科学家，强调企业数字化转型的重要性。 担保债务凭证（Collateralized Debt Obligation，简称CDO）是以抵押债务信用为基础，通过资产证券化技术对债券、贷款、保费及CDS费用等资产进行结构重组形成的固定收益证券。 通过首席数据官（CCRC-CDO）认证，证明持证人员具备为数据进行管理、分析、建模和可视化的能力；可以利用数据决策、数据治理、数据资产运营的基本工作方法和技术工具开展全面高效的数据治理及数据价值挖掘工作，从而协助组织提升数据驱动决策水平和 . Jun 4, 2018 · Now, I want to rename the dimension record with: ncrename -d record,time merged. 6, 0. nc now, I got an order of dimension like below Replies (1) RE: CDO change variable name - Added by Ralf Mueller over 8 years ago Hi Pierre! Renaming of variables should not happen at all, renaming of dimensions is taken out of the code for a year or so. So, you're in complete control of creating your dimensional model tables and loading them with data. Put albedo in a separate file from anything else. Tutorial The Climate Data Operators (CDO) software is a collection of many operators for standard processing of climate and forecast model data. e+20f ; Oct 21, 2021 · In netCDF3 files, variables can only have the unlimited dimension, if any, as their first dimension. Save LAGRANTO model results and post-process scripts - LAGRANTO/cdo_mergetime_monmean. In C this is the first dimension of an array, in Fortran, the last. At most one unlimited length dimension, called the record dimension, may be defined for each classic or 64-bit offset netCDF dataset. So that for each grid cell I have a energy time value. frb,pyg is a smart caller of a CDO binary (with all the pros and cons) doesn't need to be re-installed for a new CDO version directly bridges your data to the scienti c package in Ruby/Python isn't a shared library, which keeps everything in memory doesn't allow write access to Rename: ncrename Options in*. dimensions will give the entire dictionary. For programmers, the unlimited dimension will correspond with the slowest-varying dimension. I open myfile. #236 How to change the attributes of nc files, thanks. nc > myfile. One easier question to ask may be: how to change the variable's dimensions??? like FROM: double my_plottable_variable (time, OpticalDepth, Band, ParticleType) ; TO: my_plottable_variable (time) ; Then I start from there to delete the variable and the dimension with: ncks -C -O -x -v Band new_misr. cdo showname just shows variables, i. nc. For a created dimension you can also change the @D to @O (letter 'Oh') and add any test string you want. This tool is available DESCRIPTION ncrename renames dimensions, variables, and attributes in a netCDF file. nc ; mv outfixed. cdo seldate: Processed 13806 values from 1 variable over 2 timesteps [0. How to convert grid coordinates projection to longitude latitude (lonlat) by CDO? I would like to convert grid coordinates projection to longitude latitude (lonlat) by CDO. Is there a way to change standard_name to long_name, or to add long_name for time? RedmineHi, I want to add a dimension that is called lengthd to my NetCDF data. Command-line operators for netCDF and HDF files Aug 6, 2024 · @Kevin_Marsh Another thing that changed in the output files is the variable name valid_time, instead of time. nc file has four dimensions? (time,depth,latitude,longitude) Aug 27, 2019 · cdo sellonlatbox,0,360,-90,90 in. Available packages include This command change the name of a given variable/dimension depending on the prefix you are using To rename a variable within the file (here for 'fluxlat', the latent heat flux) RedmineHi, Is it possible to change the units of a netCDF4 file from [kg m^ (-2) s^ (-1)] to [ton/year/gridcell] ? If it is how do I do it in cdo? What command do I have to use? Kind regards, Sondre How to add time bounds and change orders of dimension and variable Command-line operators for netCDF and HDF files Hi Pierre! Renaming of variables should not happen at all, renaming of dimensions is taken out of the code for a year or so. All the new names must be unique. x, I get the following error: cdo remap (Abort): NetCDF: Invalid dimension ID or name Any hints on how to resolve this issue? I compiled CDO-2. > But I want to change the dimension's name in the nc file. > > Do you have any other suggestion still? Thanks. att-nm: The name of the attribute to edit var-nm: The name of the variable to edit mode: d=delete, a=append, c=create, m=mod, o=overwrite att-type: f=float, d=double, l = long, s=short, c=char att-val: The new value Jan 4, 2025 · In a netCDF file, dimensions must have the same name as an associated coordinate variable. now I would like to change the x and y (generic grid) into plon,plat as my new dimension. However its not possible to change attributes with CDO. Example to rename month in time both for variable -v and dimension -d: ncrename -v month,time -d month,time file. The operators include simple statistical and arithmetic functions, data selection and subsampling tools, and spatial interpolation. The chunkspec argument is a string of comma-separated associations, each specifying a dimension name, a '/' character, and optionally the corresponding chunk length for that dimension. cdo --reduce_dim,height,height_2 . nc ncks ¶ Extract variables. Also, I want to add date and time_weights to my variable which have the following properties: time_weights Size: 12x1 Dimensions: time Datatype: single Attributes: long_name = 'number of days per time step' units = 'days If a dimension name is followed by a '/' character but no subsequent chunk length, the actual dimension length is assumed. CDO was developed to have the same set of processing functions for GRIB and NetCDF datasets in one package. amuh@MJ086 I have created a x,y netcdf file and now want to add additional time energy variable. Is there an efficient way to do this? To get around the problem I wrote a loop and 'appended' one file at a time using Greetings, How do I change some values of a particular variable in a bunch of my netcdf files? Any advice would be greatly appreciated. Click OK. One can use setrtoc in place of setval for specifying a range. 14s 46MB]. Right now, CDO infers the time dimension either by unlimited, by name ('time' or 'Time') or by units (see lines 42357 and 39159 of cdilib. Contribute to BackwoodsBoomtree/Regrid_NC_CDO development by creating an account on GitHub. So I want the merged-dimension to be an indicator of ensemble numbers so that I can operate the cdo-ensemble operators on the resulting file. netCDF4 relaxes this restriction, so if you want the record dimension in a position other than the most rapidly varying dimension, you must ensure the output is a netCDF4 file. nc file in the NCO documentation? Apr 4, 2012 · Hello, So far I haven't found a simple way to do this in cdo: I have 365 NetCDF files in a directory and want to merge them all into one. It would be very nice if one could just remove the selected dimensions. nc: lon lat Is there anyway we dont change the name? I believe it's straightforward to change variable name but not dimension name in CDO, right? Thanks, Jay Dec 8, 2014 · Hi I want to edit some information in a NetCDF file, to give an example suppose that you have a ncdump of the file with the next info: NetCDF dimension information: Name: lon size: 144 ty Apr 5, 2019 · I did a check, and to me it seems the reorder works. Useful tools There are many free and open-source software packages readily available for visualizing and manipulating netCDF files. It seems CDO is not recognizing 'veget' as the z dimension. 9;" for the file below: To copy dimensions to the Shared Library: Right-click a dimension in the Shared Library and select Copy Dimension To, Shared Library. I don't think you can change the names of co-ordinate variables with CDO "chname" command - as far as I know it is only for physical "variables". And if the dimension names are not lat and lon the variables have to have a coordinates attribute which leads CDO to the grid dimensions. asc in a text editor and a) swapping 'x' and 'y' in the dimensions section, b) replacing Apr 4, 2025 · Rename an Existing Variable in a netCDF File Description Renames an existing variable that currently is part of a netCDF file that is on disk. md), which is an experience that supports many T-SQL capabilities, like creating tables and How to regrid NC files using CDO. nc -o outfixed. micom. May 1, 2023 · Translation into English with nc_strerror(-46) is "NetCDF: Invalid dimension ID or name" ncremap: ERROR Failed to generate map-file. 9. ncrename does not automatically rename the coordinate variable when the dimension is renamed. cdo mergetime file1 file2 file3 file 365 outfile. This is because the dimension itself only stores its id, name, length and whether it is unlimited or not. and file will have another dimension called temp_time. heights is a coordinate variable (according to CF-convention), so CDO does not access them directly - only via coordinate related operations, e. Dec 31, 1998 · I have a NetCDF file which I converted using 'nccopy' to make it work in CDO and the NetCDF file is 3 hourly file but the 3hour time dimension looks like this: Time coordinate : 1 step Apr 6, 2021 · I have a data which shows that the name of the variable is called empty. Jun 23, 2019 · The del statement doesn't seem to delete the dimension variable. It returns (as an argument) a dimension ID, given the netCDF ID, the dimension name, and the dimension length. I am attaching the two files here. I tried using the NCO tool ncpdq but the reported order is still time,lon,lat The files are provided for each timestep. For example Is there a nco command that will allow me to turn a non-record dimension into a record dimension in an existing netCDF file? The file has a variable data (t,x,y), and I would like to change the time variable, t, to be a record dimension. Therefore, I want to rename it. $ ncdump myfile. That is, I can achieve this effect by doing the following: 1. Could you upload output of cdo -V For double checking it would be good to have your sample data, too. nc outfile. I guess the way to proceed is to check before the H5Gmove to see if there is another var of the desired name which secretly exists, and then delete it, and then make the newly renamed dataset into a dimension scale. nc). How can I change variable and global file attributes in one step? You can use the setattribute operator with the FILE attribute name to read the attribute settings from a file. c). i had an issue in changing the variable name of a gridded population file. nc and the comparison is like this: As you see, the re-ordering has been made and the first dimension, which is the latc in my case, becomes unlimited. The Climate Hi Ruth, Name in the CDO operator name chname means the name of the variable. nc file to from time=1 to time = 299, using cdo? Let me know if something wasnt clear! I tried to be a detailed but concise as possible. cdo setattribute,FILE=myattributes. Operations such as selecting, merging or splitting variables, computing averages or performing temporal aggregations are quite straight forward to implement. So I wonder, which cdo version you used. So what you mentioned may not make sense to me. You will have more luck with the NCO function ncatted. 2. Note that you can now use CDO commands directly from R and python using the dedicated cdo package. nc DE_t2m_2019_split you can though just use the vertsum operators and keep you fingers crossed because of the nan-handling: cdo -vertsum DE_t2m_2019_01 Installing CDO CDO claims to run on any POSIX-compatible Unix-type OS, including Mac OSX, most Linux, IBM AIX, HP-UX, Solaris, BSD variants, and even Cygwin. txt: institute="My institute" source="my_original_file. However, the new file is missing the other 2 variables "lat" and "lon". See pictures of one band below. Hi all, I have a 5 dimensional variable in netcdf: float percentile_scores (percentiles, thresholds, seasons, lat, lon) that I wish to regrid (in lat/lon) with cdo remapbil. 11 (2000, 2005, 2010, 2015, 2020): 1 degree) to (population). But when I do ncdump -h merged. nc cdo -setreftime,1900-01-01,00:00:00,1day \ -settaxis,1901-02-01,12:00:00,1month \ -setcalendar,standard \ out2. Hi all, I'm just starting to learn NetCDF and NCO, so forgive me if this question's answer is obvious. Contains features that are cdo. It provides practical guidance for Warehouse in Microsoft Fabric, which is an experience that supports many T-SQL capabilities, like creating tables and managing data in tables. nc fin3. myattributes. While it appears to work when I do a print on the dataset, the dimension order doesn't actually change. >> >> Do you have any other suggestion still? I am using cdo to reduce the number of variables and the number of layers from a WRF run so I can input them into FLEXPART-WRF. Unfortunately it cannot handle 5 dimensions. NetCDF-4 datasets may have multiple Jun 23, 2023 · I've been trying to change the time dimension back to unlimited in a NetCDF file and haven't been successful. dimensions, which returns a dictionary containing the dimension name and size. nc -Karin Feb 25, 2021 · Hello, I have a question about reordering the dimensions with ncpdq. Dec 16, 2013 · symbol just can change the variable's dimension name. ncrcat fin1. intlevel or so. But for some reason, when I use settaxis, it also changes all the dimensions name, and my variable Times become a dimension so - is there anyway to change the time dimension in my frame-time. die. 5 on CentOS 7. nc See full list on linux. Here is some more info if that would help. nc: NetCDF: HDF error What does this mean? Where do I do wrong? EDIT Following the answer posted by Charlie Zender ncecat -O -u time *. transpose() on an xr. e time:units = "days since YYYY-M-D 00:00:00", instead of time:units = "days since YYYY-MM-DD 00:00:00"). The values along the dimension are stored in a coordinate variable. nc file looks like: Mar 2, 2021 · Doing "ncrename --dimension old,new" does not seem to update dimids in variables. If copying a classic model file to a netCDF-4 output file and not naming all dimensions in the chunkspec, unnamed dimensions will also use the actual dimension length for the chunk length. cdo setvals,10,2 in. 2 and cdo 1. replace missing values representation). 3, 0. Could you upload output of cdo -V May 13, 2022 · Is there an easy way using cdo or nco to bin the temperature recordings into a pre-defined latitude x longitude grid so that the resulting . For a list of available operators, see this PDF list, or here for the full documentation. asc 2. No blanks should appear in the chunkspec string, except possibly escaped blanks that are part of a dimension name. To solve that I temporarily want to reshape the variable in something like: float percentile_scores (allstacked, lat, lon) where allstacked is a new dimension with size is the Apr 28, 2025 · 0 I have two or more NetCDF files that share a time dimension and time variable, where the time variable is the same for all the files (from the start to the end of the time period, unit, etc). sh at main · hongwei8sun/LAGRANTO One easier question to ask may be: how to change the variable's dimensions??? like FROM: double my_plottable_variable (time, OpticalDepth, Band, ParticleType) ; TO: my_plottable_variable (time) ; Then I start from there to delete the variable and the dimension with: ncks -C -O -x -v Band new_misr. and i want to and new time dimension to netcdf file like "temp_time" and change the name of the time dimension to it. nc isn't practical. cdo mergetime *. hi! CDO dows recognize the expver dimension as a vertical level, so a split along this dimension together with the option `-reduce_dim` should work: cdo --reduce_dim splitlevel DE_t2m_2019_01. cdo Climate Data Operators: Highly-optimized command-line tools for manipulating and analyzing netCDF files. This is how my . My script is like this in Python: value = loadtxt ("cou However, they are read as variables and not dimensions, and thus I can't load them well in Panoply. nc 1901_final. Now I have a variable albedo (time, latitude, longitude). Mar 19, 2021 · I can split the dimension 'expver' using cdo splitlevel. I have tried some commands without sucess, e. . g. 11 (2000, 2005, 2010, 2015, 2020): 1 degree,population pop1_2000. The other dimension is ID, and there are variables with dimensions of ID and time, as well as variables with only ID as the dimension. The file is flipped with latitude on the x-axis and lon on the y-axis. In netCDF classic files, there can only be one unlimited dimension, and it must be declared first in the list of dimensions for a variable. : > ncatted -a name,Temperat 'reftime' the dimension name is kept properly as 'time'. which is changing variable name from (Population Density, v4. nc mytest. Mar 26, 2020 · 26 March 2020 Intro to Climate Data Operators (CDO) by Description Climate Data Operators (CDO) is a command line tool for transforming, converting and even performing computations on data contained in NetCDF files. nc and ncdump -h outputfile. The original file is 14GB in size so not possible to attach. To convert a relative into an absolute time axis use the CDO option ’-a’. 2, cdo 1. The current order of the dimensions is time,lon,lat and I need them to be lon,lat,time. That means that my 'time' dimension is also removed when i use --reduce_dim and not only the vertical dimensions that i would like to remove. the objective to convert the un-regular curvilinear (rotated) grid to regular coordinate system. Do you have any other solutions? Thank you in advance! That probably does not work because it would overwrite an existing dimension. you can make it a variable in your bash scripting and change it from 't' to 'time' after CDO processing Rename variable or dimension name. Jul 4, 2019 · I am wondering if there exists a command in NCO or CDO that can convert from NSIDC polar stereographic north (which is in meters) to WGS84 degrees. Is this a known CDO bug? Or is it normal? Do you know if the way around to get the same dimensions after interpolation? Thanks very much for your attention, Nicolau These are the dimensions and variables in file_in. The dimension labels are chaning and I can't use the files as a result. Hi Christian, this is a really old thread. CDO only suport classic NetCDF (time, lev, lat, lon). The validity of the old names is not checked prior to the When I use ensmean or enssum say to act along the time axis, it of course calculates the sum or mean, collapsing the time dimension to one time step. 文章浏览阅读1. nc now, I got an order of dimension like Nov 7, 2017 · It was created to support the dimension name change - its one of those dreaded secret datasets to support HDF5 dimension scales. nc Christopher Lynnes - 2012-06-15 How to regrid NC files using CDO. Do you Jan 2, 2025 · What happened? Hello, I am using . Hence you should do this: # Note that Hello, I am running CDO version 1. nc f3. My data's dimension has time, longitude, and latitude, and I want to add lengthd= 10 to my data. 1. nc fin2. ncpdq: netCDF Permute Dimensions Quickly, Pack Data Quietly (examples) -- rearrange dimensions or pack data ncra: netCDF Record Averager (examples) -- average across time (record dimension) Aug 6, 2016 · time is a dimension, and not a variable. Contribute to sarahnicholson/CDO---useful-netcdf-tools development by creating an account on GitHub. Each object that has a name in the list of old names is renamed using the corresponding name in the list of new names. One solution would be to provide a switch or environmental variable that provides a list of time names. Some examples. With the CDO option ’-r’ can be made this conversion for each operator. ds. I checked this ncremap module, but what is this 1x1. I am pointing to a usecase where the user knows the dimension name and can direct CDO. Change @D to @S and change the name to the text that you want to show. When I want to change the standard_name to long_name in the Attributes of time-variable with the following code, it shows me a warning, and it doesn't change. For CDO, in order to recognize NetCDF files, the time dimension has to be the first dimension In your case, I noticed that the variable attributes are: float spi(lev across files, within a file, over the record dimension, over other dimensions, with or without weights and masks) and of concatenating (across files, along the record dimension, along other dimensions), there are currently no fewer than five operators which tackle these two purposes: ncra, nces, ncwa, Mar 17, 2016 · I have a large netCDF file (444GB) that I would like to transpose. For example change the units attribute of variable tas to degC : cdo -setattribute,tas@units=degC infile. I'm fairly new to this so I hope anyone here could help me georeference these variables using CDO. cdo setattribute,time@long_name='time' 1901_fina. I have a NetCDF file whose x and y dimensions I want to swap completely, but nothing else. nc out. At present, neither t nor x nor y are a record dimension. Not correct Correct: I tran Also, cdo changed loc to gsize! Yes, I can use unix "cp" to copy the files, however, I am actually using cdo to change time to absolute time (cdo -a copy). cdo remapcon (Abort): Source grid cell corner coordinates missing! So i thought to do a sellonlatbox,4,20,-59,-50 of the larger (output) grid, but it gives me cdo sellonlatbox (Abort): Longitudinal dimension is too small! RedmineHi all, With cdo 1. SST_NOI20C_sr10m60d52. nc file_time. cdo(1) sellonlatbox: Processed 4423680 values from 1 variable over 60 timesteps. i applied this CDO command but it give me an error: cdo -chname,Population Density, v4. Redminehello! hope you all are well. nc It is particularly fast when you have to replace values in more than one variables in the same nc file (e. 3 Conversion of the time Some programs which work with netCDF data can only process relative time axes. Example to extract var1 and var2 and store in fileOUT Define a new dimension. In your file "longitude","latitude" ,"time" etc are NetCDF co-ordinate variables associated with a grid type. 3, using setreftime change the format of the time attribute "units" by using only one digit in the day and month numbers (i. ojx mjx fynpq kpu khp mvs iushj tjwel kqemge kosn nbd iye ukrx zmeaz jdbz