How can i save my result in each different files using FOR?

Hi, I trying to save my results in each files using FOR. Total 364 files have to be modified in m.files and the modified variables have to be saved in each varibles or each files without extra modifying.

and the file names is Proj_00001.raw, Proj_00002.raw, Proj_00003.raw, ... , Proj_00363.raw and then after modifying, i want to save my result. the name of my result files will be H1.mat, H2.mat, H3.mat, H4.mat, ..., H363.mat. OR i have to save my result using 'dicomwrite' such as H1.dcm, H2.dcm, H3.dcm,...

Summary!

Proj_00000.raw file have to save at H1.mat or H1.dcm after modification

Proj_00001.raw file have to save at H2.mat or H2.dcm after modification

Proj_00002.raw file have to save at H3.mat or H3.dcm after modification

...

Proj_00363.raw file have to save at H1364.mat or H3641.dcm after modification

this is my code.

for k=1:364

    filelist = dir('D:\CMC\Matlab\Projections_Head\*.raw');% call the file list
    fname = filelist(k).name;
    fid = fopen(fname,'r');
    A = fread(fid);
    for i = 0:1:767
        for j = 0:1:1023
            P(1+i,j+1) = 'equation for modification: P is 768x1024 double';
        end
    end
    for s=1:364                             %%this is not working at all..
        slist = strcat(num2str(s));
        sname = strcat('H',slist,'.mat');
        savefile = (sname);
        save(savefile, P);
    end
end

it seems like 'fine'. but there are an error!!

??? Error using ==> save Argument must contain a string.

what am i supposed to do? or write? thank you for helping me. :)

[Todd Flanagan]

In what way is the second FOR loop not working? Does it not save? Is there an error?

[MichaelK Kim]

did you applied the second FOR loop in your computer?

i mean the FOR s=1:364, this is 4th loof. it isn't working!! yes! there are an error...

[Walter Roberson]

Why are you saving the same data to each of the files ??

Answer 1

[Michael Katz]

Try:

 save(savefile,'P');

The second argument to SAVE should be the variable's name, not it's value.

[MichaelK Kim]

hmm., i've change my code according to your solution. but why my matlab keep busy for over 20min... so deperate situation :(

[Jan]

So it would be helpful, if you show us what 'equation for modification: P is 768x1024 double' means in detail.