CODEWITHSUNDEEP
matlabmatlab-figure
Matteo
Matteo

Reputation: 8124

Superimpose plots Matlab

I have two signals, one for each axis and taken singularly and plotted in a standard way separately they would look like this:

enter image description here enter image description here

However they represent different measurements and I need to superimpose them by representing one on the standard X-Y axis (bottom-left) and one on a different set of coordinate axis (X = left, Y = top).

I thought of the following code:

    figure(1); 
    line(1:128,imagesXMatrix(i,:));
    ax1 = gca;
    set(ax1,'XColor','r','YColor','r')
    ax2 = axes('Position',get(ax1,'Position'), ...
          'XAxisLocation','left','YAxisLocation','top', ...
          'Color', 'none','XColor','k','YColor','k');
    line(1:128,imagesYMatrix(i,:),'Parent',ax2);

but am getting the following error:

Error using axes

Bad property value found.

Object Name: axes Property

Name: 'XAxisLocation'.

which I guess means that value left is not ok for the XAxisLocation variable.

What I would really want is simply the superimposition of the two following plots, any idea on how to make it happen?

enter image description here enter image description here

Thanks a lot!

Upvotes: 2

Views: 2528

Answers (1)

Robert Seifert
Robert Seifert

Reputation: 25232

plotyy will do the trick:

figure(1) 
AX = plotyy(x1,y1,x2,y2,'plot'); 

set(get(AX(1),'Ylabel'),'String','y1') 
set(get(AX(2),'Ylabel'),'String','y2')

and additional properties like:

set(AX(1),'ylim',[...],...) 
set(AX(2),'ylim',[...],...)

and more information in the documentation.

Upvotes: 2

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