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How can I store data extracted from multiple NetCDF into already extracted txt file and add next year data after last line of previous iteration in the same txt file.

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shobhit pipil
shobhit pipil 2018-12-16
回答： shobhit pipil 2018-12-26
%MAKE SURE THE DIRECTORY IS CHANGED TO THE DIRECTORY THAT CONTAINS THE NETCDF FILES
clear
clc
% introduction of the loop
Files=dir('*.nc');
for k=1:length(Files)
FileNames=Files(k).name;
pr=ncread(FileNames,'rainfall_amount');%name of netCDF file; 'pr' is the precip variable in the netCDF file
long=ncread(FileNames,'x'); %'longitude' is the longitude variable in the netCDF file
lat=ncread(FileNames,'y'); %'latitude' is the latitude variable in the netCDF file
for j= 716:746(lat); %1:length(lat);
for i= 328:368(long); %1:length(long);
v=pr(i,j,:); %read through all lat,longs in netCDF
outfile=sprintf('%d_%d_PCP.txt',lat(j),long(i));%name of outputfile; format is 'LATITUDE_LONGITUDE_PCP.txt'
fid=fopen(outfile,'wt');
m=1;
for i = 1:2
new(m)=v(i);
m =m+1;
data= [v];
data(isnan(data)) = -99.0 ; %cleanup in case the data is a NaN
%fprintf(fid, '18910101\n');%#write the climate data starting date to header of outfile. For example, Jan. 1, 1950 is 19500101
fprintf(fid,'%5.1f\n',data); %formatting the data for SWAT specifications
fclose(fid);
disp([outfile 'created'])%display created file
clearvars data
end
end
end
end
  1 个评论
shobhit pipil
shobhit pipil 2018-12-16
data = [];
Files=dir('*.nc');
for k=1:length(Files)
FileNames=Files(k).name;
pr=ncread(FileNames,'rainfall_amount');%name of netCDF file; 'pr' is the precip variable in the netCDF file
long=ncread(FileNames,'x'); %'longitude' is the longitude variable in the netCDF file
lat=ncread(FileNames,'y'); %'latitude' is the latitude variable in the netCDF file
for j= 716:746(lat) %1:length(lat);
for i= 328:368(long) %1:length(long);
v=pr(i,j,:); %read through all lat,longs in netCDF
outfile=sprintf('%d_%d_PCP.txt',lat(j),long(i));%name of outputfile; format is 'LATITUDE_LONGITUDE_PCP.txt'
fid=fopen(outfile,'wt');
data2= [v];
data2(isnan(data2)) = -99.0 ; %cleanup in case the data is a NaN
data = [data;data2];
end
end
end
fprintf(fid, '18900101\n');%#write the climate data starting date to header of outfile. Change '20200101' to the starting date of your dataset. For example, Jan. 1, 1950 is 19500101
fprintf(fid,'%5.1f\n',data); %formatting the data for SWAT specifications
fclose(fid);
disp([outfile 'created'])%display created file

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采纳的回答

shobhit pipil
shobhit pipil 2018-12-26
% new code to extract data from netcdf file to SWAT format text file.
data =[];
Files = dir('*.nc');
for k=1:length(Files)
FilesNames = Files(k).name;
for t=1:2
pr = ncread(FilesNames,'rainfall_amount');
long = ncread(FilesNames,'x');
lat = ncread(FilesNames,'y');
end
for j = 716:746(lat);
for i = 328:368(long);
outfile =sprintf('%d_%d_PCP.txt',lat(j),long(i));
fopen all;
v = pr(i,j,:);
data2 = (v);
data2(isnan(data2)) = -99.0;
% outfile =sprintf('%d_%d_PCP.txt',lat(j),long(i));
% fopen all;
fid = fopen(outfile,'At');
data = {data;data2};
fprintf(fid,'%5.1f\n',data2);
end
fclose all;
end
end
disp([outfile 'created'])
% original code source:
% http://dficklin.weebly.com/netcdf-to-swat-climate-input-files.html

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