MATLAB函数compass()

指南针图显示了方向或速度矢量, 箭头从原点开始出现。 X, Y和Z在笛卡尔坐标中, 并绘制在圆形网格上。

句法

compass(X, Y) // It shows the compass plot having n arrows, where n is the number of components in X or Y. The area of the base of each arrow is the origin. 
compass(Z) // It displays a compass plot having n arrows, where n is the number of elements in Z.
compass(..., LineSpec) // It draws a compass plot using the line type, marker symbol, and color specified by LineSpec.
h = compass(...)// It returns handles to line objects.

例子

z=cosθ+isinθ, -π≤θ≤π
th=-pi:pi/5:pi;
zx=cos(th);
zy=sin(th);
z=zx+i*zy;
compass(z)

输出