MATLAB: Trying to plot more than two graphs with two different scales onto a single plot

graphingMATLABmultiple plotsplotyy

I would like to show the graphs of several signals from a group and a reference signal which has a completely different scale. I can use;
[ax,p1,p2]=plotyy(load(:,1),load(:,2),data(:,1),data(:,2))
the commonality between load and data is time
so, ylabel(ax(2),'Hits') ylabel(ax(1),'Displacement (in)') xlabel(ax(2),'Time (sec)')
and it works at showing two plots with two scales but I want to show more than these two plots but with the same two scales. It would greatly help reduce the number of graphs in my report and make more sense as a reader.
Any suggestions?
Thanks for your help

Best Answer

you can use hold on to keep adding to these plots
x = 1:10 %time
for i =1:3
    y(i,:)=1*x+i;
    z(i,:)=2*x.^2+100+i;
end
[ax h1 h2]=plotyy(x,y(1,:),x,z(1,:));
ylabel(ax(2),'Hits');
ylabel(ax(1),'Displacement (in)');
xlabel(ax(2),'Time (sec)')
hold(ax(1),'on');
hold(ax(2),'on');
plot(ax(1),x,y(2,:))
plot(ax(2),x,z(2,:))
plot(ax(1),x,y(3,:))
plot(ax(2),x,z(3,:))
not the cleanest example but it shows how to add to existing and when run that everything stacks appropriately.
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