instantaneous phase angle plots?

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David
David 2013-11-17
编辑： Walter Roberson 2016-12-21
Hello, I'm struggling with this last part of an instantaneous phase angle plots.
I know how to get the phase angle
yh=hilbert(data);
amplitude=abs(yh);
phase=unwrap(angle(yh));
But I want to get the sawtooth plotting of phase angle(see link image for example).
I can't seem to figure out this last part. Any help? thank you.
extra question:
Also, why aren't the values of the phase angle normalized? that is, shouldn't they always go from pi to -pi? I have a noisy signal and the extrema of the phase angle plot range from 0.2 to 0.5
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vu ngothanh
vu ngothanh 2015-8-27
编辑：vu ngothanh 2015-8-27
How can you do that. I want to do the same like you. Could you please to help me

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David
David 2013-11-18
ack! i just had to zscore normalize my signal! thankyou

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