loop of exportgraphics fails for dot indexing only in the second loop

Question

$Amit Ifrach$

Amit Ifrach 2022-12-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1883617-loop-of-exportgraphics-fails-for-dot-indexing-only-in-the-second-loop

评论： Walter Roberson 2022-12-25

Hello guys, how are you?

I got a piece of my code which meant to show and export a histogeram automatutically. it works somewhy for the first indice, but then it fails. i saw several posts about this problem, which talked about handle (which I don't use anyways) and critical failure of indexing (which I belive it is not in my case).

the code:

for n=1:length(allcellsnames)
    subplot(1,3,n)    
    histogram(allcellsareastot{1,n});
    myAxes=findobj(finalhis,'Type','Axes');
    fnfh=append(append(erase(lastentryname, '.csv'),' finalhis'));
    fhpath=(append(pwd ,append('\',append('summary figure', append('\',append('summary figure ', append(num2str(minint(n)), append(' i ', append(num2str(maxint(n)), '.png')))))))))
    exportgraphics(myAxes,(fhpath));
    
    analysisdata{9+n,1}=allcellsnames{n};
    analysisdata{9+n,2}=allcellsareastot{1,n};
end

The first indice goes good and it saves my image. in the second it subplots it to the figure, but somewhy fails to save.

it fails in the " exportgraphics(myAxes,(fhpath));"

here is the output that shows the first is fine, but the second messed up:

fhpath =
'C:\Users\Ifrac\Desktop\מעבדה\matlab\Voronoi analysis\voronoi code test\summary figure\summary figure 0.5 i 40.png'
fhpath =
'C:\Users\Ifrac\Desktop\מעבדה\matlab\Voronoi analysis\voronoi code test\summary figure\summary figure 1 i 45.png'
Error using exportgraphics
Dot indexing is not supported for variables of this type.
Error in Voronoi_exclude_borders_21122022allclareamatrixndfx (line 378)
exportgraphics(myAxes,(fhpath));

I would really appriciate any help :)

Thanks,

Amit.

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Stephen23 2022-12-23

What is FINALHIS ?

Note that you do not need to call APPEND() multple times in one line like that: APPEND() accepts multiple inputs, so you only need to call it once. Even better would be to replace it with FULLFILE() and SPRINTF().

$Amit Ifrach$

Amit Ifrach 2022-12-23

在 MATLAB Online 中打开

Hi sephen, thanks!

finalhis is the figure:

finalhis=figure(ADcntr);

and thanks for the append tip! :)

Amit.

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Answer 1

Sulaymon Eshkabilov 2022-12-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1883617-loop-of-exportgraphics-fails-for-dot-indexing-only-in-the-second-loop#answer_1135372

As you stated: finalhis=figure(ADcntr);

Then this command: exportgraphics(myAxes,(fhpath));

has to be:

exportgraphics(finlhis,fhpath);

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Sulaymon Eshkabilov 2022-12-25

Welcome. It requires a figure handle and thus, you'd need such syntax.

Walter Roberson 2022-12-25

exportgraphics(OBJ, FILESPEC) saves the specified graphics to a file.

OBJ is the handle of any type of an axes, a figure, a chart that can

be a child of the figure, a tiled chart layout, or a container within

the figure.

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Answer 2

Walter Roberson 2022-12-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1883617-loop-of-exportgraphics-fails-for-dot-indexing-only-in-the-second-loop#answer_1135382

在 MATLAB Online 中打开

try

    myAxes = subplot(1,3,n);    
    histogram(myAxes, allcellsareastot{1,n});

with no find()

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Walter Roberson 2022-12-25

在 MATLAB Online 中打开

I do not know where you got the idea that allcellsareastot was to be passed to exportgraphics.

for n=1:length(allcellsnames)
    myAxes = subplot(1,3,n);
    histogram(myAxes, allcellsareastot{1,n});
    fnfh=append(append(erase(lastentryname, '.csv'),' finalhis'));
    fhpath=(append(pwd ,append('\',append('summary figure', append('\',append('summary figure ', append(num2str(minint(n)), append(' i ', append(num2str(maxint(n)), '.png')))))))))
    exportgraphics(myAxes,(fhpath));
    
    analysisdata{9+n,1}=allcellsnames{n};
    analysisdata{9+n,2}=allcellsareastot{1,n};
end