How can I save my scalogram image?
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I am creating a scalogram with:
img=cwt(signal);
I want to save the scalogram produced. I am looking just to save the image itself; no axes, title, key, etc.
I am trying:
exportgraphics(img,"cwt.png")
and receive errror:
Error using exportgraphics
First parameter must specify the axes or chart object.
Is img not the object I want since that is where I saved the cwt(signal)?
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Accepted Answer
Rik
on 16 Mar 2022
Since it clears the current figure (and then creates the object, the easiest way is to this:
img=cwt(signal);
exportgraphics(gca,"cwt.png");
2 Comments
Rik
on 21 Mar 2022
load mtlb
cwt(mtlb,Fs)
h=get(gca,'Children');
h_im=findobj(h,'Type','Image');
figure,imshow(h_im.CData)
So, as you can see, you will have to rescale based on the XData and YData properties to view it properly. Then you will have to apply a colormap to convert it to a color image. (but this way you have the actual data instead of a screenshot)
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