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Questions tagged [ncdf4]

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

98 questions
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Keeping raster variable names when converting to NetCDF using R

Taking a raster file of monthly temperature data for multiple years which has a name attached accessible via names(object) in the following format 'Jan.1981', 'Feb.1981' etc (example files for two years that works with code below here - adding all…
Pad
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Extracting data from .nc file

This is my first attempt working with data in a .nc file. I manually downloaded the dataset (https://downloads.psl.noaa.gov/Datasets/noaa.oisst.v2/sst.ltm.1961-1990.nc) and saved it to my computer. However, I'm having difficulty extracting the data…
tnt
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Failed installation of package "ncdf4" in R studio

I'm trying to install an R package called "ncdf4". I've tried installing it in the "packages" section in the R-studio interface, but have also tried entering install.packages("ncdf4") into the console. This is the output I get in both…
AlexLee
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Download NASA satellite data using RCurl in R

I am trying to download a ncdf file using rCurl. Can anyone provide any advice on why this is not working? require(RCurl) require(ncdf4) url <- "https://oceandata.sci.gsfc.nasa.gov/MODIS-Aqua/Mapped/Seasonal_Climatology/4km/sst/" filename…
Megan
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Writing R raster stack to NetCDF

I've got an R grid file containing monthly temperature data for the year 1981 which I read in and tried to write to NetCDF using the following code: library(raster) library(ncdf4) library(RNetCDF) test <- raster('.../TavgM_1981.gri', package =…
Pad
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How to change map projection from pacific to Atlantic centered?

library(sf) library(tidyverse) I have an sf object with geometry type:point projected over pacific bbox: xmin: 0 ymin: -78 xmax: 359 ymax: 0 (WGS 84) I want to re-project the sf object to Atlantic centered (-180,180) from pacific view…
Raed Hamed
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Crop netcdf files in R

I'm trying to crop a netcdf file with a polygon with stars package from daily netcdf data. I think I have managed to do it and could get this plot with this script library(tidyverse) library(sf) library(stars) # Input nc file nc.file <-…
pacomet
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How can I handle netCDF data in R in order to find average annual temperature from monthly data?

I am trying to handle some climate data. I have a .nc file of data concerning latitude,longitude, time and surface temperature for each month from 01-850 to 12-1049. I need to convert these monthly data to annual and find annual average temperature…
Georgia Pan
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Creating raster layer from NetCDF in OPeNDAP DODs (Distributed Oceanographic Data Systems) format

I am trying to access NetCDF files from Simple Ocean Data Assimilation (SODA) 2.2.4. I want to download them as raster layers, with temp, year, depth, lat, and lon data. The files are in DODs (Distributed Oceans Data Systems)/OPeNDAP because they…
zoek
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Splitting an netcdf file with nco using a variable as a splitting criteria

I have a netcdf file structured as bellow: File AA_14.nc (NC_FORMAT_CLASSIC): 8 variables (excluding dimension variables): short year[time] units: - short doy[time] units: days since 2008-01-01 long_name: day…
Marin
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Extract climate data from nc file

I am working on a .nc file. The file can be downloaded file size: 35 M here. I have not worked with nc or raster so much before in R. I explored raster package as well as ncdf4 package based on suggestions in different stack answers in other…
anup
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Error in { : task 1 failed - "error returned from C call" using ncvar_get (ncdf4 package) within foreach loop

I am trying to extract data from a .nc file. Since there are 7 variables in my file, I want to loop the ncvar_get function through all 7 using foreach. Here is my code: # EXTRACTING CLIMATE DATA FROM NETCDF4…
Hai nguyen
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Out of range values when converting .nc file to raster

I was converting the .nc file downloaded from here to raster to map the SST spatial variation. The unit is supposed to be in Kelvin. But the values I got are not in normal ranges (degree celsius or Kelvin). Here's my code: library(ncdf4) nasa.temp…
LauraEverdeen
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Subsetting multiple nc-files based on time dimension

I’m trying to subset 4 nc-files to get a shorter time period. Each file contains 94 years, and I’d like to subset 20 years in each file. I’m importing the 4 files with list.files (which is must I think since I will ultimately have even more files…
MoonS
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R-Opening multiple netcdf4 at once

I am trying to open approximately 10 ncdf4 files at once and extract the data contained within. After setting the correct wd, I have tried: temp = list.files(pattern='*.nc') myfiles = lapply(temp,nc_open) nav_lat_test <-…
Fish_Person
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