MATLAB - reading multiple dat files for loop - matlab

Question

Hello everyone I'm trying to make a loop file to read several files, this is what I have done so far:
anoini = 1980;
anofin = 1981;
mesini = 1;
mesfin = 1;
diai=1;
diaf=1;
nano = (anofin-anoini)+1;
if (mesini == 1) || (mesini == 3) || (mesini == 5) || (mesini == 7) || (mesini == 8) || (mesini == 10) || (mesini == 12)
lmes = 31;
elseif (mesini == 4) || (mesini == 6) || (mesini == 9) || (mesini == 11)
lmes = 30;
elseif (mesini == 2)
lmes = 28;
end
for idia=1:lmes
for iano = anoini:anofin
for nn = 1:nano
D_1{nn,idia} = load(sprintf('F:\\salidas_nam\\%d\\%d%0.2u%0.2u06_NAM_day01.dat',iano,iano,mesini,idia));
end
end
end
For example I want this two files, but it only seems to read one
"F:\salidas_nam\1980\1980010106_NAM_day01.dat"
"F:\salidas_nam\1981\1981010106_NAM_day01.dat"
The idea is to automatize this so I can pick which years to read, it is not necesary to use sprintf, if someone knows how to do this in another way I will apreciate it.

Answer 1

I think the problem is in your inner loop. You were iterating over nn but not using it in the construction of the filename. So you ended up loading each file twice:
Therefore your output looked like this (repeated files):
D_1{1,1} = F:\salidas_nam\1980\1980010106_NAM_day01.dat
D_1{2,1} = F:\salidas_nam\1980\1980010106_NAM_day01.dat
D_1{1,2} = F:\salidas_nam\1981\1981010106_NAM_day01.dat
D_1{2,2} = F:\salidas_nam\1981\1981010106_NAM_day01.dat
...
However, I think you want this (no repeats):
D_1{1,1} = F:\salidas_nam\1980\1980010106_NAM_day01.dat
D_1{2,1} = F:\salidas_nam\1981\1981010106_NAM_day01.dat
D_1{1,2} = F:\salidas_nam\1980\1980010206_NAM_day01.dat
D_1{2,2} = F:\salidas_nam\1981\1981010206_NAM_day01.dat
...
If that is the case then you can drop the inner for loop and do something like this:
for idia=1:lmes
nn = 1;
for iano = anoini:anofin
D_1{nn,idia} = load(sprintf('F:\\salidas_nam\\%d\\%d%0.2u%0.2u06_NAM_day01.dat',iano,iano,mesini,idia));
nn = nn+1;
end
end
This does not address the potential leapyear issues you might have as Adriaan mentioned in the comments.