Hope this helps you get started:
%%set up dummy data
fid = fopen('tmp.mat','w');
fmtStr = repmat(' %f',[1,13]);
for lonInd=1:18
for latInd=1:18
fprintf(fid,['%d %d' fmtStr,'\n'], lonInd, latInd, 2013,(1:12)*latInd*lonInd);
end
end
fclose(fid);
nccreate('monthly_tmp.nc', 'monthly_temperatures', 'Dimensions', {'ff' 12 'lon' 18 'lat' 18}, 'Format','classic')
fid=fopen('tmp.mat');
while ~feof(fid)
coor=fscanf(fid, '%d', 2);
var =fscanf(fid, '%f', 13);
% assuming the lat and lon are whole numbers from 1 to 180
lat=coor(1); lon=coor(2);
% assuming var(1) is the year
temp = var(2:end);
ncwrite('monthly_tmp.nc', 'monthly_temperatures', temp, [1 lon lat]);
end
fclose(fid);
%%spot check
d = ncread('monthly_tmp.nc','monthly_temperatures',[1,2,2],[12, 1,1])
