Subplots in an "axes" object

Hi,

I would like to sublot four images (X(:,:,1) -> X(:,:,4)) in an "axes" object (axes1) but every time I have one image displayed and not the totality of the images.

Here is the part of my code which nomally should do that :

if(1<=nb_coupes) 
axes(handles.axes1)
subplot(121)
imagesc(X(:,:,1)), colormap gray, axis('image'),axis('off'),colormap gray,zoom(2);
setappdata (Feature_Tracking,'images',X);
end

if(2<=nb_coupes) 
hold on
subplot(122)
imagesc(X(:,:,2)), colormap gray, axis('image'),axis('off'),colormap gray,zoom(2);
setappdata (Feature_Tracking,'images',X);
end

if(3<=nb_coupes) 
hold on
subplot(211)
imagesc(X(:,:,3)), colormap gray, axis('image'),axis('off'),colormap gray,zoom(2);
setappdata (Feature_Tracking,'images',X);
end

set(handles.axes1,'String',FileName)
axes(handles.axes1)
imagesc(X(:,:,1)), colormap gray, axis off, axis image
setappdata (Feature_Tracking,'images',X);

Would you please help me solving the problem ?

Thank you in advance !

Answer 1

[Walter Roberson]

You cannot do this. subplot() creates new axes for the plots, and cannot plot inside an axes.

See also this part of the subplot documentation:

If a subplot specification causes a new axis to overlap a existing axis, the existing axis is deleted - unless the position of the new and existing axis are identical. For example, the statement subplot(1,2,1) deletes all existing axes overlapping the left side of the figure window and creates a new axis on that side—unless there is an axes there with a position that exactly matches the position of the new axes (and 'replace' was not specified), in which case all other overlapping axes will be deleted and the matching axes will become the current axes.

For displaying multiple images in the same axes, see http://www.mathworks.com/matlabcentral/answers/41928-display-multiple-images-on-single-axes

[K BV]

Thanks for the answer WR.

I could display my images as I wished.