Re: [Matplotlib-users] Novice question: Am I using pyplot.rgrids correctly?

[Pierre H. <pie...@cr...>]

Le 18/12/2012 11:13, Bob Dowling a écrit :
> Any how, the answer seems to be "yes I'm using rgrids() correctly, but 
> no I'm not using matplotlib-friendly data points".  I shall adjust my 
> values of (r,th).
You don't need to change your (r,th) values. The two workarounds I see
to get your "version2" script work are :

1) Either call rgrids *after* plotting :

subplot(111, polar=True)
polar(t, r)
rgrids([2,4,6])


2) or call ylim to change the "rmin" parameter which tunes the radius
offset :

subplot(111, polar=True)
rgrids([2,4,6])
polar(t, r)
ylim(ymin=0) # or ylim(0,8) which looks even better in your specific case


Best,
Pierre