Double Loop iterations doubt

Hello,

I have a doubt about the possibility of having 2 loops going around in the same For. The code that I have is the following:

for i = 0:natts-1
fieldname = netcdf.inqAttName(ncid(j,:), netcdf.getConstant('NC_GLOBAL'),i);
fileinfo.(fieldname) = netcdf.getAtt(ncid,netcdf.getConstant('NC_GLOBAL'), fieldname );    
end

And I would like to change the index on the ncid variable every time the initial index goes around 12 times. Is it possible to do such thing ? to have on index going up every time the first one does a 12 iteration loop ?

Thanks Rod

Answer 1

[Matt Fig]

Is this what you mean?

if ~mod(i,12)
 j = j + 1;
end

I am assuming here that j is set outside the loop you show, and is NOT an index of an outer FOR loop. If it is the index of an outer FOR loop, you should instead set it like this:

for j = mod(0:48,12)+1  % Or whatever.
   % Inner loop
end

Also, it is not recommended to mask MATLAB functions, such as the i and j function.

[Jan]

I still think, that "i" and "j" should not be functions and even MLint suggests to use the 1i instead to get the imaginary value.

[Coastal_Eng]

Tks for the answer,

I put the J there just for clarifying things, I forgot to say it but the ncid should go around also 12 times (12 variables in an array), but it should only pass to the next variable saved in the array when the first loop goes around 12 times:

exaple

natts=[1,1,1]; ncid=[10,20,30];

for i=1:length(natts) fieldname = function (ncid,i) end

when the ncid is 10 it should run 3 times (length of the natts) befores the ncid becomes 20, and then run other 3 times (length of natts) and finally whenis 30 runs the last 3 times.

Is this possible. I'm doing this because i'm working with 12 netCDF files at a time (i don't know if this is wise),and i want to extract the hole info with only one script. Tks

Rod