Creating a netcdf File in Matlab 2010b

Hi, I need to create a netCDF file with three variables (Latitude, longitude and r values) that I have generated from a different Matlab program. Can anyone suggest a method that will work in the the newest version of Matlab (2010b)?

Thank you Atreyee

Answer 1

[Ashish Uthama]

The example here shows how to create one variable in a NetCDF file. Try to extend that to three and update your question if you have trouble.

R2011a is the current 'newest' version. If you are able to upgrade, you can use the newer nccreate and ncwrite functions.

Answer 2

[Dave Correa]

Hello;

Here an example.

I hope this is of some help.

Regards

Dave Correa

E-mail:[e-mail]

http://fismatlab.blogspot.com/

close all, clear all, clc
yearini=1960;
yearfin=1970;
%%--------------------
nt=144;
nx=1440;
ny=720;
lon=linspace(-180,180,nx);
lat=linspace(90,-90,ny);
time=1:nt;
[mlat,mlon]=meshgrid(lat,lon);
disp('Creando file Netcdf...')
filenc=['Data.nc'];
ncid = netcdf.create(filenc,'NC_WRITE');
% Crear dimensiones
dimid_lon = netcdf.defDim(ncid,'longitude',nx);
dimid_lat = netcdf.defDim(ncid,'latitude',ny); 
dimid_time = netcdf.defDim(ncid,'time',nt); 
% Crear variables y atributos
varid_lon = netcdf.defVar(ncid,'longitude','double',dimid_lon);
netcdf.putAtt(ncid,varid_lon,'long_name','Longitude')
netcdf.putAtt(ncid,varid_lon,'units','degrees_east')
% 
varid_lat = netcdf.defVar(ncid,'latitude','double',dimid_lat);
netcdf.putAtt(ncid,varid_lat,'long_name','Latitude')
netcdf.putAtt(ncid,varid_lat,'units','degrees_north')
%
varid_time = netcdf.defVar(ncid,'time','double',dimid_time);
netcdf.putAtt(ncid,varid_time,'long_name','Time')
netcdf.putAtt(ncid,varid_time,'units','Months since 1960-01-01 00:00:00')
% 
varid_prec = netcdf.defVar(ncid,'prec','double',[dimid_lon,dimid_lat,dimid_time]);
netcdf.putAtt(ncid,varid_prec,'long_name','Variable')
netcdf.putAtt(ncid,varid_prec,'units','mm')
netcdf.putAtt(ncid,varid_prec,'missing_value',-9999)
netcdf.endDef(ncid)
% % % Agregar datos de coordenadas
netcdf.putVar(ncid,varid_lon,lon);
netcdf.putVar(ncid,varid_lat,lat);
netcdf.putVar(ncid,varid_time,time);
m=1;
for year=yearini:yearfin   
for mes=1:12    
netcdf.putVar(ncid,varid_prec,[0 0 m-1],[nx ny 1],tmp);
m=m+1;
end
end
netcdf.close(ncid)

Answer 3

[Carlos Batista]

Anyone know how to declare the variable tmp in David's script !?