How can I save each images in a loop for?

Question

Felicia DE CAPUA 2023-2-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1908810-how-can-i-save-each-images-in-a-loop-for

评论： Walter Roberson 2023-2-16

Hi everyone,

I need to save each images product in a ciclo for. How can I do this?

When I tried to do it, it appears:

"Error using plot_matrix

Too many output arguments."

Do you have any advices?

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Vilém Frynta 2023-2-8

编辑：Vilém Frynta 2023-2-8

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It would be helpful to see your code, so we can help you better.

Without seeing your code, I can advise you to to create strings that change in each loop and then use these strings as new names to save images.

Something like...

for q = 1:10
      name = strcat("img",num2str(q))   % create name; results will be img1, img2,..
      plot(x(q),y(q))                     % plot your things
      print(gcf,name,'-dpng','-r300');    % save plot (or use imwrite if it's an image)
end

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Answer 1

Dongyue 2023-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/1908810-how-can-i-save-each-images-in-a-loop-for#answer_1173440

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clear; close all; clc;
for i = 1:5
    img_name = ['img',num2str(i),'.jpg'];
    img = rand(25,25,3);
    imwrite(img,img_name)
end

You can go through the documentation for imwrite() for more information about saving images:

https://www.mathworks.com/help/matlab/ref/imwrite.html

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Walter Roberson 2023-2-16

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I would probably code either

img_name = sprintf('img%d.jpg', i);

or else

img_name = "img" + i + ".jpg";

When you use double-quoted strings and the + operator then the number in i (and up to 4 decimal places) will be converted to text automatically without needing to explicitly convert the number.

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