create a table containing especific names of files selected from string in MATLAB

Hi All,

I would like to create 3 lists with the names of files starting with png, jpg and bmp. All files are images inside the directory tree: /year_month/year_month_day/ as you can see here:

./20160203/20160203_png01_test1.png.tmp

./20160203/20160203_jpg01_test2.jpg.tmp

./20160203/20160203_bmp01_test3.bmp.tmp

./20160204/20160204_png01_test1.png.tmp

./20160204/20160204_jpg01_test2.jpg.tmp

./20160204/20160204_bmp01_test3.bmp.tmp

./20160205/20160205_png01_test1.png.tmp

./20160205/20160205_jpg01_test2.jpg.tmp

./20160205/20160205_bmp01_test3.bmp.tmp

every list should contain the pictures name for every extension (jpg, bmp and png) for example list1 should have:

./20160203/20160203_png01_test1.png.tmp

./20160204/20160204_png01_test1.png.tmp

./20160205/20160205_png01_test1.png.tmp

list2 should have:

./20160203/20160203_jpg01_test2.jpg.tmp

./20160204/20160204_jpg01_test2.jpg.tmp

./20160205/20160205_jpg01_test2.jpg.tmp

and list3 the same but with bmp...

my code look like this:

workdir = '/home/mati/201602/';

cd(workdir);

command = ['find -name *test*.tmp'];

[status,cmdout] = system(command);

c = strsplit(strtrim(cmdout));

n_files = length(c);

format_id=cell(n_files,1);

for ifile =1:n_files

        d = textscan(c{ifile},'%s%s', 'Delimiter','_');

        s1 = d{2}{:};

        format_id{ifile} = s1;

end

format_id = unique(format_id);

nformat = length(format_id);

for iformat = 1:nformat

       templist = [format_id{iformat} '.dat'];

       fid = fopen(templist,'w');

        for ifiles =1:n_files
            fprintf(fid, '%6s\n', c{iformat});
        end

       fid  = fclose(fid);

end

but in every list I am getting all the names.

I get the lists:

png01.dat

jpg01.dat

bmp01.dat

which is fine and is what I wanted to have, but in every list I have all the names of the pictures and not only the names with the respective extension.

First I would like to make an "index" in order to select only the files with the respective extension (bmp jpg and png) and then send them to a list. How could I do that?

I hope the problem is clear. Thanks in advance for your help.