Not enough input arguments error(line 5).

When I'm writing the following code:

function pushbutton3_Callback(hObject, eventdata, handles)
    [filename pathname] = uigetfile({'*.png';'*.ipg'},'File Selector');
    image = strcat(pathname, filename);
    img1=imread(image);
    axes(handles.axes1);
    figure, imshow(img1);
    h = waitbar(0,'Image is processing, Please wait...');
    steps = 1000;
    for step = 1:steps
    waitbar(step / steps)
    end
    I1=rgb2gray(img1);
    str=strel('disk',10);
    test2=imopen(I1,str);
    level = graythresh(test2);
    bw = im2bw(test2,level);
    str=strel('disk',25);
    test3=imopen(bw,str);
    axes(handles.axes4);
    imshow(test3)
    %draw borders
    B = bwboundaries(test3);
    axes(handles.axes4);
    imshow(test3)
    hold on
    for k = 1:length(B)
    boundary = B{k};
    plot(boundary(:,2), boundary(:,1), 'g', 'LineWidth', 0.2)
    end
    %Print count
    [labeled,numObjects] = bwlabel(test3,4);
    set(handles.lbl_tot_obj,'string', numObjects);
    %Print file name and location
    set(handles.edit1,'string',filename);
    set(handles.edit2,'string', image);
    close(h)
    end

The following error pops up:

Not enough input arguments.

Error in color (line 5)
axes(handles.axes1);

I used this image file as input -

I just want to know if there's a problem with the axes or i messed up somewhere along the way. Thank you.

[Adam]

Where has this function come from? It looks like part of a GUIDE file, but the fact the error message points to line 5 suggests it is just a standalone file. Then again it also seems to think the file is called 'color', which cannot be the case if this is the whole file.

It is possible to have a function like this in a standalone file (though doesn't make much sense), but you have to make sure you pass the 3 arguments in that it is expecting if you have detached it from a GUIDE file.

Answer 1

[Jan]

Use the debugger to find the reason of the problem: https://www.mathworks.com/help/matlab/matlab_prog/debugging-process-and-features.html . Set a breakpoint in the failing line and run the code again. When Matlab stops, check the contents of handles. I guess that this 3rd argument was not provided, when this callback was called. If this is the case, the problem is not in the shown code, but in the definition of the callback. Where and how did you define it?

[Subham Chatterjee]

I messed up with the function call. Although I'm still confused with the arguments in the function call and how to work it out. I hope I'll recover with it in due time. Anyways thanks for your suggestion. Here's the original file from where I read about the code but was unable to decipher it:

https://www.researchgate.net/publication/320925518_RICE_GRAIN_CLASSIFICATION_MATLAB_CODE

Here's the complete project log:

https://www.researchgate.net/project/RICE-GRAIN-CLASSIFICATION-BASED-ON-THE-IMAGE-PROCESSING-TECHNIQUES

[Jan]

This file contains the code of the callbacks only. I suggest to contact the author as ask for the FIG file in addition. Or create your own GUI and insert the code of the callbacks to your project.