How to define two dimension longitude, latitude and variable for saving data in netcdf format?
43 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello everyone,
I have longitude,laltitude and var data. All are in two dimension. All the provided examples in matlab community are focused on saving 1D latitude,longitude for 2d variable. I have tried below codes so far..
lon=rand(406,271); lat=rand(406,271); var=rand(406,271);
ncid = netcdf.create('Output.nc','NETCDF4');
dim_lon = netcdf.defDim(ncid,'lon',length(lon));
dim_lat = netcdf.defDim(ncid,'lat',length(lat));
var1_lon = netcdf.defVar(ncid,'lon','double',dim_lon);
var1_lat = netcdf.defVar(ncid,'lat','double',dim_lat);
var_50 = netcdf.defVar(ncid,'var','float', [dim_lat dim_lon]);
netcdf.putAtt(ncid,var1_lon,lon);
netcdf.putAtt(ncid,var1_lat,lat);
netcdf.putAtt(ncid,var_50,var);
I think the above code is suitable for 1D lat-lon dimension saving in netcdf. I find it difficult (showing error) to use it for 2D lat-lon data.
Looking forward to any sort of help or directions. Thanks in advance.
0 commentaires
Réponse acceptée
CHIRANJIT DAS
le 24 Juin 2022
dimidlon = netcdf.defDim(ncid,'lon',size(lon,1));
dimidlat = netcdf.defDim(ncid,'lat',size(lon,2));
%variables
tim_ID=netcdf.defVar(ncid,'time','double',dimidtim);
lon_ID=netcdf.defVar(ncid,'lon','double',[dimidlon,dimidlat]);
lat_ID=netcdf.defVar(ncid,'lat','double',[dimidlon dimidlat]);
Try it, this should probably work in your problem scenario.
Good luck
Plus de réponses (1)
KSSV
le 23 Juin 2022
lon=rand(406,271); lat=rand(406,271); var=rand(406,271);
[nx,ny] = size(lon) ;
% nc filename to be written
file = 'myfile.nc' ;
nccreate(file,'x','Dimensions',{'x',1,nx},'DeflateLevel',7) ;
nccreate(file,'y','Dimensions',{'y',1,ny},'DeflateLevel',7) ;
nccreate(file,'lon','Dimensions',{'x','y'},'DeflateLevel',7) ;
ncwrite(file,'lon',lon) ;
nccreate(file,'lat','Dimensions',{'x','y'},'DeflateLevel',7) ;
ncwrite(file,'lat',lat) ;
nccreate(file,'var','Dimensions',{'x','y'},'DeflateLevel',7) ;
ncwrite(file,'var',var) ;
6 commentaires
KSSV
le 24 Juin 2022
Then you can just write a vector of lon and lat right? Why you want to write a 2D matrix?
Voir également
Catégories
En savoir plus sur NetCDF dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!