新手求救：怎么得到纵坐标值

[songj04]

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，

[麒麟子]

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

[laosam280]

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.