求大神教我如何用labveiw求功率谱密度。如果用matlab直接用一句语句就可以搞，但是用labveiw呢file:///C:/Users/Administrator/AppData/Roaming/Tencent/Users/398806093/QQ/WinTemp/RichOle/VN_1~3WC~UEAT)VTKC]6UJJ.png，怎么弄？file:///C:/Users/Administrator/AppData/Roaming/Tencent/Users/398806093/QQ/WinTemp/RichOle/VN_1~3WC~UEAT)VTKC]6UJJ.pngfile:///C:/Users/Administrator/AppData/Roaming/Tencent/Users/398806093/QQ/WinTemp/RichOle/VN_1~3WC~UEAT)VTKC]6UJJ.png用下面这个控件怎么实现求功率谱密度，会有频率和功率谱输出吗？那相对应的输入是什么？跪求