plotyy

Plots given datasets in independent y-axes and a common x-axis.

Syntax

plot(x1, y1, x2, y2)

ax = plot(x1, y1, x2, y2)

[ax h1 h2] = plot(x1, y1, x2, y2)

Inputs

x1, y1
Dataset to be plotted in the first y-axis.
Type: double | integer
Dimension: scalar | vector | matrix
x2, y2
Dataset to be plotted in the second y-axis.
Type: double | integer
Dimension: scalar | vector | matrix

Outputs

ax
A vector containing the handles of the two y-axes.
Type: double
Dimension: vector
h1
Handle of the first line graphics object.
h2
Handle of the second line graphics object.

Examples

Simple example: 
clf;
x = [0:0.1:2*pi];
plotyy(x, sin(x), x, 2*cos(x));
Figure 1.
Set secondary axis properties: 
clf;
x = [0:0.1:2*pi];
[ax h1 h2] = plotyy(x, sin(x), x, 2*cos(x));

set(ax(1),'fontsize',12);
ylabel(ax(2), 'Y2 axis label');
ylim(ax(2), [-4 4]);
set(ax(2),'ycolor',[0 120 0]);
set(ax(2),'ytick',5);
Figure 2.
Add a curve in an existing secondary axis: 
clf;
x = [0:0.1:2*pi];
[ax h1 h2] = plotyy(x, sin(x), x, 2*cos(x));
hold
plot(ax(2), x, 4*cos(x));
Figure 3.