MATLAB: How to plot two plotyy plots in the same plot

multiple axesmultiple plotsplotyy

I am trying to plot four plots in the same figure. First i plot using plotyy. Then two graphs are created, each with a yaxis.

Now I want to plot another two plots. One using yaxis-1 and one using yaxis-2. How do i do this?

If I do

[ax,h1,h2] = plotyy(...)
hold on
plot(ax(1),...)
plot(ax(2),...)

i don't get all four plots.

Thanks 🙂

Ben

[ax,h1,h2] = plotyy(...) 
hold(ax(1))
plot(ax(1),...)
hold(ax(2))
plot(ax(2),...)

The problem was simple, hold on just holds the current axes and your plotyy makes two axes so only one is the current.

[ax,h1,h2] = plotyy(x1,y1,x3,y3,@bar,@line);  %note x3 y3
hold(ax(1), 'on');
plot(ax(1), x2, y2);  %on first axis

plotyy() creates two axes on top of each other. The syntax

 >> [ax h1 h2] = plotyy(x1,y1,x2,y2);

will put the handles to both axes in the variable "ax". Then you can use the syntax

 >> hold(ax(1),...)
or
 >> hold(ax(2),...)

to apply the hold to ones set of axes or the other.