intercept of secondary axis

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John
John on 19 Jan 2013
Hi,
Im plotting two lines using two axis. They are velocity and acceleration. My question is how can I make the 0 point on the two axis be at the same level? At the moment, the 0 on the secondary axis is inline with 50 on the primary axis.
plotyy(x,y1,x,y2,'plot');
Thank you

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 19 Jan 2013
Edited: Azzi Abdelmalek on 19 Jan 2013
After plotyy add this:
yt=get(gca, 'ytick');
yt(1)=[];
set(gca,'ytick',yt)
  4 Comments
John
John on 19 Jan 2013
Hi,
Noting happened, no error either.
My code is:
plotyy(x,y1,x,y2,'plot');
Azzi Abdelmalek
Azzi Abdelmalek on 19 Jan 2013
please, post the code (allows copy past).

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More Answers (1)

Azzi Abdelmalek
Azzi Abdelmalek on 19 Jan 2013
Edited: Azzi Abdelmalek on 19 Jan 2013
Try this
close;
x=0:250;
y1=100*abs(sin(0.01*x)),
y2=10*cos(.04*x);
[ax,h1,h2]=plotyy(x,y1,x,y2,'plot');
yt=get(ax(1), 'ytick');
yt(1)=[];
set(ax(1),'ytick',yt)
  5 Comments
John
John on 19 Jan 2013
All I have is 3 variables x, y1 and y2.
My code is: plotyy(x,y1,x,y2,'plot');
I'm trying to plot them on a graph with a secondary axis. But I need the the '0' point on both axis to be at the same level.
In the picture above, one axis is 50 and same level of the other axis is 0. I need the 0s inline.
Can this be done?
Thanks
Azzi Abdelmalek
Azzi Abdelmalek on 19 Jan 2013
Edited: Azzi Abdelmalek on 19 Jan 2013
Ok, I get it now, use
ylim=get(ax(1), 'ylim');
ytick=get(ax(1), 'ytick');
set(ax(2),'ylim',ylim,'ytick',ytick)
but you will loose the negative part

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