Save uniquely named variables in loop to a certain location

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Roel
Roel 2018-4-23
评论： KSSV 2018-4-23
Hello everyone,
I am running a loop where a variable U is calculated and saved in a .mat file under a unique name every iteration. To name the .mat file I use sprintf:
for j:length(d)
% Long calculation of U left out
save(sprintf('U%02d',j+1), 'U', '-v7.3');
end
Each U is now saved in a .mat file named with the iteriation number with two digits after 'U' and in mat version 7.3. This works great.
However, I would also like define the folder location where the .mat file is saved. I know how to do this using the save command without sprintf but I can't seem to get this to work in combination with sprintf.
Any help is greatly appreciated,
Thank you, Roel

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采纳的回答

Stephen23
Stephen23 2018-4-23
编辑：Stephen23 2018-4-23
Do NOT concatenate paths/directories. The recommended method is to use fullfile:
fullname = fullfile(dir1path,dir2path,...,filename)
This will automatically take into account the required file separators. For your case, something like this:
sdp = some directory path
for k = 1:numel(d)
% Long calculation of U left out
fnm = sprintf('U%02d.mat',k+1);
save(fullfile(sdp,fnm), 'U', '-v7.3')
end

更多回答（1 个）

KSSV
KSSV 2018-4-23
path = pwd ; % Give your path here
filename = [pwd,filesep,sprintf('U%02d',j+1)]
By the way, you need not save data of iteration into different .mat files. You can save them into a 3D matrix or cell and save it into a singl mat file.
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Roel
Roel 2018-4-23
Thanks KSSV, this solves my problem.
I want different .mat files because of RAM issues. Saving the data into one matrix or mat causes an 'out of memory error' on my system.
Thanks again!

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