change aspect on polar plot

2011 4 30
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I want to make a polar plot from azimuth angles and zenith angles. I wonder in polar(theta,rho) if theta is azimuth and rho is zenith? and if they must be in radian? I also wonder how I can put change the position of the origin (0) on the circule as I want the origin to start from north and increse clockwise. I appereciate your help.

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Walter Roberson
Walter Roberson 2011-4-30

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No, rho is radius. You cannot create a polar plot just from angles.
I do not see a MATLAB routine for 3D polar plots, but there might perhaps be one in the MATLAB File Exchange (FEX)

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Hassan
Hassan 2011-4-30
thanks Walter for the reply. azimuth range is 0-360 degrees and zenith range is 0-90 degrees. in that case, rho is radius of the circle which is equivalent to zenith, and azimuth is the angle (theta) am I right?
and the theta and rho must be in radiance?
I don't need a 3D polar plot. It can be done on the 2D polar plot.
Walter Roberson
Walter Roberson 2011-4-30
Since rho is not an angle, it is incorrect to think of it as being in degrees _or_ radians. theta must be in radians.
Hassan
Hassan 2011-4-30
I see. what about the change of the origin of angle to start from north (if we assume the current origin is in east) and increases clockwise?

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