Confused about atan versus angle- Not getting the same result!

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Sarah Crimi
Sarah Crimi 2018-11-16
评论： Sarah Crimi 2018-11-19
Hi,
So I am creating a GUI to show some admittance data. I have the data in two columns real and imaginary by using the angle command. However, when I attempt to check my data, atan does not give me the same result as angle. I can't figure out why. For instance at the peak of one of the plots, I have real= .003453, imag = .001354.
Then, atan((.001354/.003453))=.38, atand((.001354/.003453))=21.4113. BUT angle((.001354/.003453))=0. Why?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Here's the code I used in my GUI.
%This selects the proper plot to plot according to slider value (from 1-220).
handles.admdatatocompare = handles.celldata1{1,handles.slidervar};
guidata(hObject,handles);
admtocompare_full=handles.admdatatocompare(:,2)+(1i.*handles.admdatatocompare(:,3));
admchannel=m1(:,2)+(1i.*m1(:,3));
admphasechannel = angle(admchannel);
admphasetocompare = angle(admtocompare_full);

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采纳的回答

Stephan
Stephan 2018-11-16
编辑：Stephen23 2018-11-16
Hi,
angle works correctly on complex numbers:
atan((.001354/.003453))
atand((.001354/.003453))
angle((.001354i+.003453))
% This is what you did:
angle(.001354/.003453)+0i
Best regards
Stephan

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