Saving a plot as png 224*224*3 image

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ali
ali 2021-2-17
评论： ali 2021-6-24
Hi,
I have generated a plot in Matlab as shown in figure.When i save it using 'saveas(gcf,'im1.png')' , it is saved as a 656*875*3 png image.I want to save it as 224*224*3 png image without the axis titles,labelling and colorbar.i.e.only the actual plot.Can anyone kindly guide on it?
guide about
Thanks
  2 个评论
ali
ali 2021-2-18
Its a spectrogram with frequency on y axis and time on x axis

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回答（1 个）

Rik
Rik 2021-2-17
You can do three things:
  1. Don't create your image as a plot, but as an image.
  2. Crop the image down to the location of your axes object.
  3. Use export_fig.
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ali
ali 2021-6-17
S=load('data.mat');
x = sum(S.data/max(max(abs(S.data)))); %normalizing bw 0 and 1 and summing across rows
figure();
c=jet(256);colormap(c);
spectrogram(x,hanning(512),487,1024,12.4e3,'centered','yaxis','MinThreshold',-50);
ali
ali 2021-6-24
Hi @Rik,
Waiting for your response.
thanks

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