for loops.

Hello! Please, how can I implement an iteration, such that a first loop executes a series of expressions within a range of (32) values and a second loop executes a series of expressions within another range of(16) values for each result of the first iteration. the result of this would be 512 iterations. Thank u.

[Walter Roberson]

Are the values independent or does the first loop need to complete before the second loop could start?

Answer 1

[the cyclist]

I guess you mean nested loops?

 for ni=1:32
 for nj=1:16
    % Do something here?
 end
 end

[Walter Roberson]

Or maybe

parfor ni=1:32

for nj=1:16

%do something here?

end

end

But that presumes that each if the nj loops does not need results from a different ni loop, a point I explicitly questioned.

Depending what exactly has to be done, this might even be a case for co-distribution using for ni = drange(1:32)

[God'sSon]

thanks, but for my code, the nj loops needs the results from the ni loop. ie, after the ni loop completes its 32 iterations, the nj loop should perform 16 iterations for each of the 32 results from ni.

[Walter Roberson]

parfor ni=1:32

%do first thing here

end

parfor ni=1:32

for nj=1:16

%do second thing here

end

end

It would, though, not surprise me if the first parfor would be more efficient as a for loop -- depends how much work is done in the first part.

[God'sSon]

I did away with the parfor loops and got it running using only for-loops in all the cases.

Thanks u very much!