How to save multiple files in a 'for' loop

Hi everyone,

i am trying to save multiple files in a for loop.

however, the saved files of coordinate2 always inclueds the data from coordinate 1. 3 incluedes all data from 2 and 1.

i upload the first three files of coordinate to show the problems-

does anyone know how to save the data seperately in different files?

coordinate= [];
i =1:6;

for t=1:length(i)

load(['snakes_frame' num2str(t) '.mat']);


for a=1:length(snakes)

X = snakes{1,a}.x;
Y = snakes{1,a}.y;

coordinate=[coordinate,X, Y];


end

save(['C:\Users\length\coordinate' num2str(t) '.mat'],'coordinate');

end

Answer 1

[Stephen23]

Move the coordinate=[] line inside the first loop:

for t = 1:numel(i)
    coordinate = [];
    ... the rest of your code
end

Even better would be to get rid of the inner loop. If you had saved the data in non-scalar structure this would be trivial, but because you appear to have scalar structure in a cell array it is more complex, but something like this should work:

P = 'C:\Users\length';
V = 1:6;
for kk = 1:numel(V)
    F = sprintf('snakes_frame%u.mat',V(kk)); % better than NUM2STR.
    S = load(F);
    S = [S.snakes{:}]; % convert ugly cell-of-scalar-structures to one non-scalar structure.
    coordinate = reshape([S.x;s.y],1,[]);
    G = sprintf('coordinate%u.mat',kk);
    save(fullfile(P,G),'coordinate');
end

Read more:

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

[yunwei hu]

Thanks! it works.