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Question: Spherical coordinates

Question:Spherical coordinates

8shekj 10
plot
November 11 2010
2

This problem has been doing my head in for a long time now! I'd be very grateful if anyone can help.

I need to plot this function f(r,theta,phi)=exp[-(r-r0)2/22]. where r0=4 But first, if this is in spherical coordinates, where's the theta and phi in this expression? Why are they missing?

I believe the code required to plot this is something like: sphericalplot(f(r),r=0..5,theta=0..2Pi,phi=0..2Pi), but it doens't seem to work. If theta and phi are missing in the above expression, why are they included in the plot code? 

Secondly, I can't seem to figure out the code that's required to plot this in cartesian coordinates

Many Thanks
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