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

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).

[Mathieu NOE]

hello again Alberto

I wish I could help you but I don't have the Image Processing Toolbox

but I can help you on the code that cause you trouble if you can send me the data (CoordinateMatrix) as mat file .

[Alberto Acri]

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]

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

Answer 1

[Mathieu NOE]

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

[Alberto Acri]

No, I got the same result as I did.

[Mathieu NOE]

Have you used the corrected functions from my zip ?

when I run "codeMN.m" (my debug version) I get only one figure (hFig3) and it's like :

[Alberto Acri]

Yes, I've seen your graph and it's fine.

I tried again and it works! Thank you!

[Mathieu NOE]

Glab we finally managed it !

[Alberto Acri]

I ask for one last help.

In case I also have a white image (without closed curves) it gives me this error:

Output argument "Distance" (and possibly others) not assigned a value in the execution with "euclidean" function.
Error in DBSCAN (line 22)

Also should I add some "else" to the end of funcion_main?

[Mathieu NOE]

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]

ok, perfect!

Answer 2

[Jiri Hajek]

Hi, you need to use the hold function after you display the first curve.