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Questions tagged [ncdf4]

An R package as an interface to Unidata netCDF (Version 4 or earlier) format data files.

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How to extract single variable from multiple nc files and save it to new nc file using cdo?

I have monthly data from 2015-01 to 2099-12 with hundreds of variables (big dataset). Now I just want to extract single variable (say, FAREA_BURNED) from each nc files and save it as FAREA_BURNED.nc file. I find several ways on internet, but none of…
Hemraj Bhattarai
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Flipped raster map with no CRS and unable to mask with shapefile

I am trying to obtain the average temperature for different provinces in Ecuador on a specific date (2018-11-10). I obtained the global temperature data from the CPC Global Unified Temperature website which comes in a .nc file for each year. Thus, I…
Alonso Quijano
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Extract temperature data from NC files in a loop

I'm looking to extract some climate data from .nc files in R.d I've managed to make my code run for extracting data from a single file but I've got many different .nc files from which I'd like to extract a the entire time series of data from…
RGR_288
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Problems running tidync on windows - convert filtered nc object to dataframe

I have a series of netCDF files which I am trying to convert to a dataframe after filtering the dimensions. This worked fine on my Mac, but I cannot get hyper_tibble() or hyper_array() to run on my Windows PC. There's no error, the function just…
faith
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Layer names of netCDF files

I am working with big ncdf4 files. Example gridded temperature data as time series from UK met office Hadley data center: "CRUTEM.5.0.1.0 HadSST.4.0.0.0". Working with the ncdf4 dataset needs much memory if imported as an ncdf4 file and is very…
AloesR2512
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Opening .NC file in R online rather than downloading it

I am trying to access the .nc file in R which can be found(downloaded) here: https://www.ncei.noaa.gov/data/nclimgrid-daily/access/grids/1951/ncdd-195101-grd-scaled.nc I tried using this function nc_open form ncdf4 library in…
Prasad Thota
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How extract a region from a ncdf file

I have a ncdf file for the whole world and I just want to extract and plot US. our_nc_data <- nc_open("main_2010.nc") print(our_nc_data) lswt_array <- ncvar_get(our_nc_data, "o3") image(lswt_array) our_nc_data$dim$lon$vals ->…
Arwen
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How to write a data frame to netcdf file in R

I have a data frame (df) in R, which represent a trajectory/track, including time, position, and ID. I would like to write it from R as a netCDF file. Here is the df: df <-structure(list(ID = 1:7, longitude = c(43.064598540146, 43.1822580645161,…
ahmathelte
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How to subset latitude and longitude in nc format since they are not in dimensions in R

The latitude and longitude are not in dimensions and only are variables, how can I subset them? f = nc_open("df.nc") f is in 2 dimension of [stations, time] Where stations has 2 variables of latitude and longitude lat =…
SHAH
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How to read a sub-set of a NetCDF file wraping around the desired dimension values?

I have NetCDF files from NCEP/DOE Reanalysis 2, which contains data for the entire globe. That makes me want to load the values like this. library(ncdf4) file1 <- nc_open("uwnd.2017.nc") ncvar_get(file1, "lon") This outputs a vector of 144…
Dan Sid
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Reading HadUK-Grid (NetCDF) files into R and covert into dataframe

Data read in from: https://data.ceda.ac.uk/badc/ukmo-hadobs/data/insitu/MOHC/HadOBS/HadUK-Grid/v1.1.0.0/region/tasmin/day/v20220310 Read daily min temp data in nc <- nc_open("xxxxx") print(nc) *Time variable info printed....* time …
Megang
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how to convert the .hdf file to dataset?

I am using one of the files in here: http://orca.science.oregonstate.edu/1080.by.2160.monthly.hdf.vgpm.m.chl.m.sst.php: untar(tarfile = "http://orca.science.oregonstate.edu/data/1x2/monthly/vgpm.r2018.m.chl.m.sst/hdf/vgpm.m.2010.tar", exdir =…
yuliaUU
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reading NetCDF files - tibble columns must have compatible sizes

I like to read NetCDF files via stars::read_ncdf or tidync::tidync but get an error message like #> Error: #> ! Tibble columns must have compatible sizes. #> • Size 2: Columns `filter_id` and `filter_params`. #> • Size 3: Column `chunksizes`. #> ℹ…
ckluss
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Error calculating area of raster with lat/lon projection

I have a global raster stack (of three rasters) whose pixel values are the percent of a land use for that pixel. Here's the raster metadata: class : RasterBrick dimensions : 3600, 7200, 25920000, 3 (nrow, ncol, ncell, nlayers) resolution : 1,…
Stephen Wood
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the action can´t be completed because the folder is open in R session

I'm using package ncdf4 to read .nc file. After extracting the data, the .nc file stays open by RStudio, so I can't delete or rename the file in windows (I receive the error: "the action can´t be completed because the folder is open in RStudio R…
Shajar
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