Extract data from fvtool output
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Hi there,
I am designing a filter using MATLAB's Filter Design Tool, however I need to verify certain data points in the response. In particular the group delay values. FVTool allows you to view the results of different responses (e.g. see following image), but I need a means of extracting the response data for further use in my code. How can I extract the group delay (or magnitude and phase) data from the filter design tool?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/157394/image.png)
How can I export that curve?
Thanks for any assistance you can offer me!
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Star Strider
el 25 de Oct. de 2016
I don’t routinely use fvtool, so my experience with it is limited. See the section on Modifying the Plot in the fvtool documentation. That will probably let you do what you want.
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Star Strider
el 25 de Oct. de 2016
My pleasure.
You can’t get there from here with fvtool. It’s designed to graphically let you explore the characteristics of your filter in a GUI.
Since you’ve already designed your filter, use the grpdelay, phasedelay, and related functions in the Signal Processing Toolbox to get the results you want.
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