Saving heatmaps as image

I want to save 3 images as jpg of dimension 227x227-

1. Heatmap1
2. Heatmap2
3. Subplot of Heatmap1 and Heatmap2

This is the code for my heatmaps:

% Heatmap1
        subplot(2,1,1)
        heata=heatmap(n2E);
        heata.GridVisible='off';
        colormap(jet)
        heata.ColorbarVisible='off';
        caxis([-0.4440 0.8660 ])
        heata.FontColor='none';
       
%Heatmap2
        subplot(2,1,2)
        
        heatp=heatmap(n2);
        heatp.GridVisible='off';
        colormap(jet)
        heatp.ColorbarVisible='off';
        caxis([0   4095])
        heatp.FontColor='none';
        
%subplot of heatmaps
        ha=get(gcf,'children');
        set(ha(1),'position',[.1 .1 .8 .4])
        set(ha(2),'position',[.1 .5 .8 .5])
        

I was able to save the subplot of the heatmaps using:

 Path=strcat('C:\Users\Admin\Documents\MATLAB\h3.jpg';
 saveas(gcf,Path);
 

I'm not able to save Heatmap1 and heatmap2 as seperate image files as well.

Please help me out with the code.

Answer 1

[Ameer Hamza]

If you are using R2020a, you can use exportgraphics() ans specify the handle of graphic object.

n2E = rand(10); % for example
n2 = rand(10);
% Heatmap1
        subplot(2,1,1)
        heata=heatmap(n2E);
        heata.GridVisible='off';
        colormap(jet)
        heata.ColorbarVisible='off';
        caxis([-0.4440 0.8660 ])
        heata.FontColor='none';
       
%Heatmap2
        subplot(2,1,2)
        
        heatp=heatmap(n2);
        heatp.GridVisible='off';
        colormap(jet)
        heatp.ColorbarVisible='off';
        caxis([0   4095])
        heatp.FontColor='none';
        
%subplot of heatmaps
        ha=get(gcf,'children');
        set(ha(1),'position',[.1 .1 .8 .4])
        set(ha(2),'position',[.1 .5 .8 .5])
        
        exportgraphics(gcf, 'figure.jpg');
        exportgraphics(ha(1), 'subplot1.jpg');
        exportgraphics(ha(2), 'subplot2.jpg');

[meghna roy chowdhury]

Thank you!

I want to save the 2 subplots as 227x227 size images. How do I do that?

[Ameer Hamza]

In that case, you may need to read the images, use imresize() and then save the image using imwrite().

img1 = imread('subplot1.jpg');
img1 = imresize(img1, [227, 227]);
imwrite(img1, 'subplot1.jpg');
% same for subplot2

Add these lines at the end of the code.