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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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Write a matrix of strings to netCDF file in R

Is it possible to write a matrix of string variables to a netCDF file in R? When I run the following the R session aborts. library(ncdf4) # define a small set of netCDF dimensions lon3 <- seq(0, 2.0, 0.5) nlon3 <- length(lon3) lat3 <- seq(0, 0.5,…
Dave_L
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How to read this .nc file (from NCAR)

To proceed my study, I downloaded the NCAR datasets from the CMIP website, including tasmax, tasmin, pr, and rsds variables. However, I cannot read these datasets properly using R codes though those outcomes that look wrong can be obtained. The NCAR…
zongxu li
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How i can convert ncdf (of Sentinel_5_L2) files to geotiff?

I am trying to do a geotiff file with a netcdf file. I have this file (Sentinel_5_L2). But my code is not run. Anyone know as create the geotiff file? File https://wetransfer.com/downloads/7c5692bef082bc64999e10d8a7a91e8f20211116115821/7774f8 This…
Bryan Alemán
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How to correctly get a NCDF file into a data.frame?

Since a couple of weeks ive been trying to get a NetCDF file into a dataframe. Even though Im succesfull in extracting the variables/dimensions and plotting a slice from the ncdf file, all the data is husseled when cbinding it into a dataframe and…
HeinB
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Is there a way to check if a variable exists in a netcdf file already in R?

I created a NetCDF file with a number of variables in it. While debugging and testing writing out new variables to the files I created the variable 'RH' in some files, but the majority still have no 'RH' in them. Now I want to run my script that…
matlabcat
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Extract the data from NC file using R studio

I have the NC file with 0.5 resolution containing yearly PDSI index from 1900 to 2013 of globe. how can I get the one value for each year for entire Europe/Asia/America. thanks a lot
Sudip Acharya
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Passed a filename that is NOT a string of characters! (RMarkdown)

I'm accessing ncdf files directly from a website [here][1] into my RMarkdown. When I try to read the file using the nc_open functions as in the code below, I get the error 'Passed a filename that is NOT a string of characters!' Any idea how I can…
Kami
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loop to open, get variables and export multiple nc files in r

I have over 60 nc files for specific coordinates which contain only one variable. I want to extract the variables (tasmax) from them in a csv file. The code for one file is: ncdata <-…
Korina
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How to get date and depth from netcdf file and merge into a data frame?

I downloaded temperature data from https://www.nodc.noaa.gov/cgi-bin/OC5/woa18/woa18.pl and I opened it in R. I am trying to create a data frame Temp where all the temperature, depth and date information are merged into a single data frame . I can…
L55
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R Memory Management: Getting values of large RasterFile prompts error: cannot allocate vector of size n GB

I am aware that there are similar questions and problems around but mine is very specific. I'm working with the WorldClim and Chelsa Climate data sets in 30 arc-second resolution. In the process I want to put the specific datasets into a ncdf4 file.…
Helge
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Looping through nc files in R

Good morning everyone, I am currently using the code written by Antonio Olinto Avila-da-Silva on this link: https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=5954 It allows me to extract data of type sst/chlor_a from nc file. It…
Gaspard
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why am I getting error $ operator is invalid without using $ in my code (in R)?

I'm creating an array from netcdf files and I keep getting this error at the start of the for loop: Error: $ operator is invalid for atomic vectors. This is my code: vec0 <- vector() time <- c(vec0,1:1952) vec1 <- vector() temp <-…
Ktass
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Including a map on "levelplot" in R?

I'm trying to include a map of the shoreline, and possibly also the country boundaries, on top of a levelplot with latitude and longitude coordinates. The code I have so far for the levelplot is: library(lattice) library(ncdf4) ncin <-…
AlexLee
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How to extract data as raster from binary file

I have the binary file and its control file is provided in figure Control File. I want to extract the rain with latitude and longitude as raster in r. Can anybody help? library(weathercan) library(rNOMADS) library(rgdal) …
Sikandar Ali
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Gaps in RasterLayer using R

I have this shapefile, from where I took the first two columns (left and top) to acess another database and get values of elevation. Simple feature collection with 959 features and 5 fields geometry type: MULTIPOINT dimension: XY bbox: …
Fabio Seixas
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