Problem in plotting to the appdesigner UIAxes and showing error Reference to non-existent field 'UIAxes'.

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Medical Imaging 2020-11-2

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https://ww2.mathworks.cn/matlabcentral/answers/634234-problem-in-plotting-to-the-appdesigner-uiaxes-and-showing-error-reference-to-non-existent-field-uia

编辑： Adam Danz 2020-12-20

I am incorporating my matlab code to appdesigner and having issue plot in the UIaxes. to plot the spectrum I have written the code in matlab as shown below:

%% plot spectrum
hfig = figure();
findpeaks(abs(spectrum), f_axis,...
    'MinPeakProminence', 4,'Annotate', 'extents',...
    'MinPeakWidth', 8, 'SortStr', 'descend');
set(gca, 'color', 'w', 'Fontsize', 10.0, 'Fontweight', 'bold')
set(gcf,'color','w')
title('FID - Metabolite frequencies','Fontsize', 12.0, 'Fontweight','bold')
xlabel('Frequency (Hz)')
ylabel('SNR (a.u.)')
xlim([-1000 500]);
% to pull out plot axis
ax = gca;

below is the code I am trying to plot the "ax" in UIAxes as shown in image. Please let me know what is wrong I am doing.

FIDs = struct;
for k = 1:numel(app.index_fid)
    [FIDs(k).frequency, FIDs(k).spectrum, FIDs(k).peaks, ...
        FIDs(k).location, FIDs(k).FWHM, FIDs(k).prominence,...
        FIDs(k).meanAbs, FIDs(k).meanStd,ax] = ...
        FID_process(sTWIX(app.index_fid(k)), ...
        sTWIX(app.index_fid(k)).files);
% imshow(hfig)
plot(app.UIAxes,ax);
%plot (hx,'parent',app.UIAxes,xlabel,ylabel);
end

it is showing error in front of line plot(app.UIAxes,ax);

which is "Reference to non-existent field 'UIAxes'".

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Medical Imaging 2020-11-2

DataProcess_July2020_2.mlapp

thank you for the response. Here I have attached the app file please let me know if they are sufficient. Apprecioated if you could provide thensolution. I have been struggling since long and I am also beginner to the app design.

Thank you in advance.

Adam Danz 2020-11-2

You forgot instructions on how to reproduce the problem. What steps do I need to take to get the error you're seeing?

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采纳的回答

Adam Danz 2020-11-2

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/634234-problem-in-plotting-to-the-appdesigner-uiaxes-and-showing-error-reference-to-non-existent-field-uia#answer_532049

编辑：Adam Danz 2020-12-20

The first thing the LoadFileandprocessFIDButtonPushed does is delete its inputs (yikes!!).

There's almost never a reason to use clear or clc in a function. You're deleting the 'app' input which explains the error when you're trying to use plot(app.UIAxes,ax).

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Medical Imaging 2020-11-2

I have copied the clear clc from the matlab code file but now deleted and run again it is working fine now. Thank you.

Adam Danz 2020-11-2

That's what I thought.

When copying and using code you should take some time to understand what each line generally does.

Glad I could help.

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