problem on saving within a folder of the figures I'm going to generate

Question

Alberto Acri 2023-2-17

0
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https://ww2.mathworks.cn/matlabcentral/answers/1914365-problem-on-saving-within-a-folder-of-the-figures-i-m-going-to-generate

评论： Luca Ferro 2023-2-20

I have a problem on saving the figures I go to generate.

Here is the code I am using to save the images:

filePattern_transformation = fullfile(transformation, '*.jpg');
jpegFiles_transformation = dir(filePattern_transformation);
for k_transformation = 1  %:length(jpegFiles_transformation)
    baseFileName_transformation = jpegFiles_transformation(k_transformation).name;
    
    % FUNCTION -......................... 
    [name_figure] = function_transformation(transformation, baseFileName_transformation);   % inside the function: name_figure = figure;
    
    destdirectory_name_folder = pwd;
    output_image_transformation = sprintf('image_%03d.png', k_transformation);
    fulldestination_transformation = fullfile(destdirectory_name_folder, output_image_transformation);  
%     imwrite(name_figure, fulldestination_transformation);
%     saveas(name_figure, fulldestination_transformation)
    
end

If I use the "saveas" command the code works but it generates me "wrong" figures (see TRANSFORMATION_1.png) with the white border around the image. I need to create an image like "Image_1.jpg," that is, without that white border. For comparison you can see the two attached images ("Image_1.jpg" and "TRANSFORMATION_1.png").

If I use the "imwrite" command it gives me the following error:

Error using imwrite (line 442)
Expected DATA to be one of these types:
double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, logical
Instead its type was matlab.ui.Figure.

Is there any way to be able to get the correct save? Any solution is appreciated!

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Alberto Acri 2023-2-18

Thank you for your reply. I tried with one image but it creates a white outline on the outer edge.

Luca Ferro 2023-2-20

according to the documentation it should minimize the white space of the outer edge, apparently it does not in your case. Mind that again accordin to the documentation, windows operating system enforces a minimum window width and a maximum window size. If you specify a figure size outside of those limits, the displayed figure will conform to the limits instead of the size you specified.

Alternatively i know that for plots you can try to use the set command and maybe it can work even if i have some doubts about it:

set(name_figure,'OuterPosition', [left bottom width height])

exeperiment a bit the the values between the square brackets.

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