新手求救：怎么得到纵坐标值
 

用Matlab绘制了一个频响图，要知道某频率时（即横轴上某点）的响应值（纵轴），怎么求啊，先谢谢了，

回复: 新手求救：怎么得到纵坐标值
 

用ginput函数
example
[x,y] = ginput(n)
[x,y] = ginput
[x,y,button] = ginput(...)

回复: 新手求救：怎么得到纵坐标值
 

if you got the solution from a function you have known,it's easy to be done this.
you can input the index of the point you want,than the value comes.