A figure created within a for loop is not plotted (only the last one is shown)

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Alberto Acri 2022-12-5

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评论： Alberto Acri 2022-12-5

采纳的回答： Mathieu NOE

Hello! I have the code attached.

A figure created within a for loop (fig_2.png) is not plotted (only the last one figure is shown -> fig_5.png).

I would like to get the figure on the left (see bottom) but I actually get the figure on the right, that is, it is missing the plotting of a curve (fig_2.png).

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Alberto Acri 2022-12-5

Hi! The codes are all there. What do you need? 'CoordinateMatrix' are two rx2 double matrices that I have no way to attach because I have already attached other files.

Mathieu NOE 2022-12-5

you can avoid the 10 files attachment limit by zipping all files , then you have again room for attaching 'CoordinateMatrix' data

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采纳的回答

Mathieu NOE 2022-12-5

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1871277-a-figure-created-within-a-for-loop-is-not-plotted-only-the-last-one-is-shown#answer_1120372

alberto.zip

hello again

so there was some figure calls still present in some functions (fun1, fun2 ,...)

I cleaned that so you have only the 3D plot

check the updates in the zip attached

I created a function "codeMN.m" that I used for this correction, but you should use "code.m" on your side

hope it helps

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Mathieu NOE 2022-12-5

编辑：Mathieu NOE 2022-12-5

在 MATLAB Online 中打开

in this case what is the array CoordinateMatrix ?

I assume it's empty so you have to make a test if CoordinateMatrix is empty or not

so your main loop in code.m should include this test :

for k = 1:length(imageFiles)
    baseFileName = imageFiles(k).name;
    fullFileName = fullfile(myFolder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    imageArray = imread(fullFileName);
    imageArray1 = im2uint8(imageArray);
    drawnow;
    
    CoordinateMatrix = pic2points(imageArray1);
    if ~isempty(CoordinateMatrix)  % HERE
        %======================================================
        % check this part
    
        X = CoordinateMatrix;
    
        matrix_points = function_main(X);
    
        %=======================================================
    
    
        % Switch to the figure for the 3-D plotting:
        figure(hFig3);
        current_z = z(k) * ones(size(matrix_points, 1), 1);
        plot3(matrix_points(:, 1), matrix_points(:, 2), current_z, 'k.');
    
        hold on
        %drawnow;
    end
end

Alberto Acri 2022-12-5

ok, perfect!

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