On Fri, Aug 20, 2010 at 8:33 AM, Michael Droettboom <md...@stsci.edu> wrote:
> On 08/19/2010 05:53 PM, Friedrich Romstedt wrote: > > 2010/8/19 Michael Droettboom<md...@stsci.edu>: > > > >> On 08/18/2010 06:03 PM, Friedrich Romstedt wrote: > >> > >>> Is the attached issue with a plain polar axes already fixed? I never > >>> encountered this before. 344 degrees happens to be 6.0 rad. I'm on > >>> svn 8626. > >>> > >> How are you creating that graph? By default, polar plots don't do that. > >> > > Yeah, it's my issue, but I'm not happy with fixing it. Currently, > > matplotlib forces the xticks (i.e., the theta ticks) to be at sensible > > values via .set_xticks() and .set_xlabels() (projections/polar.py). > > > > I'm coding a matplotlib extension package which has to clear the axes > > often, but restoring the major locators, the title and stuff after > > clearing. It was agnostic to the specialities of polar axes so far. > > > Why and how are you restoring the major locator? It seems like that's > the issue. I don't think preventing the theta locator from being > changed is something we want to do. Polar plots (by default) just set > fixed theta ticks at multiples of pi/4. > > I would rather suggest to insert a new Locator class being aware of > > radians. It would suffice to return tick positions dividing 2 pi into > > an integer number of bins. It's not necessary to cover all the > > peculiarities of the old historic division system into 360 parts. > > > Perhaps using FixedLocator, rather than explicitly setting the ticks > using set_xticks (as polar plots currently do) would be better. > However, the locator could still be changed, not really addressing your > problem. > > For convenience, however, we could add a locator that given n, divides > 2pi into n parts. > > Accompanying would be formatters in radians and degrees with > > adjustable precision (no autodetect necessary). > > > Sure. Adding a radian formatter makes sense. > > Just curious, this wouldn't have to be just for PolarPlots, right? Could it also be used for regular plots of sinusoids and such. Ben Root
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