Is there a way to set the color map and color limits of the dsp.SpectrumAnalyzer without using the spectrum properties GUI?

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boatnoise
boatnoise 2015-6-11
评论： Mary Malast 2022-3-16
I have a piece of script that calls the dsp.SpectrumAnalyzer and uses it as a spectrogram. I would like to be able to hard code the color map and color limits into the script so that I don't have to go through the GUI in the spectrogram window to change these parameters each time it starts. Is there a property that can be set ahead of time that does this?

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Aarti Ghatkesar
Aarti Ghatkesar 2015-6-16
Hi
This cannot be done as there are no command line API's available to set the color properties for Spectrum Analyzer in DSP System Toolbox.

更多回答（1 个）

Kenny Barlee
Kenny Barlee 2016-1-12
There is actually an easy way to do this (posting as a note for people who find this page):
  1. make a spectrum analyzer object
  2. display data in it
  3. create figure handle to it
  4. set the colormap and color limits using figure handle
% create object
obj_spectrum = dsp.SpectrumAnalyzer(...)
% display data in it
step(obj_spectrum, data) % ('data' needs to come from somewhere)
% get figure handle
hfig = gcf
% set parameters
hfig.CurrentAxes.CLim = [-20 30] % for scale between -20dBm and 30dBm
hfig.Colormap = jet(256) % use jet/ hot/ cool/ grey etc

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