MATLAB函数plotyy()

它创建在左侧和右侧均带有y轴的图形。

句法

plotyy(X1, Y1, X2, Y2) //   It plots X1 versus Y1 with y-axis label on the left and plot X2 versus Y2 with y-axis labeling on the right.
plotyy(X1, Y1, X2, Y2, 'function') // It uses the plotting function specified by the string 'function' instead of plot to produce each graph. 'function' can be plot, semilogx, semilogy, stem, loglog etc.
plotyy(X1, Y1, X2, Y2, 'function1', 'function2') // It uses function1(X1, Y1) to plot the information for the left-axis and function2(X2, Y2) to plot the information for the right axis.
[AX, H1, H2] = plotyy(...) // It returns the handles of the two axes generated in AX and the handle of the graphics objects from each plots in H1 and H2. AX (1) is a left axes and AX (2) is a right axes.

例子

y_1=e^-x sinx, 0≤t≤10
y_2=e^x
x= 1:1:10;
y1=exp(-x).*sin(x);
y2=exp(x);
Ax=plotyy(x, y1, x, y2);
hy1=get(Ax(1), 'ylabel');
hy2= get(Ax(2), 'ylabel');
set(hy1, 'string', 'e^-x sin(x)');
set(hy2, 'string', ' e^ x');

输出