using plotyy for multiple plots

I have four plots, to be plotted in the same figure. Two plots are for a y-axis on the right hand side and two for the left hand side. for each pair, the x values are different. For example:

% Two plots for y at right axis

x1 = 0:10;
x2 = 0:5;
y1 = rand(1,11);
y2 = rand(1,6); 

% Two plots for y at left axis

x3 = 0:10;
x4 = 0:5;
y3 = rand(1,11);
y4 = rand(1,6);

How can I plot them in a same figure with plotyy or any other command?

Thanks, :)

Soroush

Answer 1

[Walter Roberson]

ax = plotyy(x3, y3, x1, y1);   %left then right
line(ax(1), x4, y4);   %add another line to left axis
line(ax(2), x2, y2);   %add another line to right axis

[Soroush]

Thank you very much for the response. However, I receive an error for using line command:

Error using line

Vectors must be the same lengths.

[Walter Roberson]

ax = plotyy(x3, y3, x1, y1);   %left then right
line(x4, y4, 'Parent', ax(1));   %add another line to left axis
line(x2, y2, 'Parent', ax(2));   %add another line to right axis