[Matplotlib-users] Legend labels and placement ignored?

Akkana Peck akkana at shallowsky.com
Fri Feb 23 16:57:09 EST 2018


That's it! Adding loc= fixes the problem. Many thanks!

So I guess the u, p and p were coming from iterating over the string
"upper left". How funny! (Funny now that it's solved, anyway. :-)

        ...Akkana

vincent.adrien at gmail.com writes:
> Hi Akkana,
> 
> Just to be sure, did you try with
> ```
> ax1.legend(loc="upper left")  # instead of ax1.legend("upper left")
> ```
> 
> Best,
> Adrien
> 
> On 02/23/2018 01:01 PM, Akkana Peck wrote:
> > Hi -- I'm having a problem with the legend on one of two subplots.
> > For each curve plotted on each subplot, I set label="something",
> > and then I set subplot.legend(position). This works for ax2, but
> > for ax1 it's ignored.
> > 
> > I asked on #matplotlib on Freenode and was advised it looked like
> > a bug and that I should report it. So I did,
> > https://github.com/matplotlib/matplotlib/issues/10576
> > but I thought I'd ask here too, to see if I'm doing something wrong
> > in the way I specify my legends.
> > 
> > I pared the example program down to this:
> > 
> > =======
> > import matplotlib.pyplot as plt
> > from matplotlib import gridspec
> > import numpy as np
> > 
> > def plot_planet():
> >      tde = np.array([-23.029638, -22.953653, -22.871279, -22.782548, -22.687498, -22.586167, -22.478597, -22.364832, -22.244918, -22.118904, -21.986842])
> > 
> >      obliq_ra = [-3.67878, -3.97686, -4.27044, -4.55928, -4.84302, -5.12142, -5.39412, -5.66088, -5.92146, -6.17544, -6.42264]
> >      eccen_ra = [ 0.40722, 0.27366, 0.14028, 0.0072, -0.12558, -0.25788, -0.3897, -0.52098, -0.6516, -0.78162, -0.91086]
> >      true_ra = [-3.27156, -3.7032, -4.13016, -4.55208, -4.9686, -5.3793, -5.78382, -6.18186, -6.57306, -6.95706, -7.3335 ]
> > 
> >      fig = plt.figure(figsize=(12, 8))   # width, height in inches
> > 
> >      gs = gridspec.GridSpec(1, 2, width_ratios=[2.5, 1])
> > 
> >      # Plot equations of time:
> >      ax1 = fig.add_subplot(gs[0])
> >      ax1.plot(obliq_ra, label="obliquity",    color="lightblue")
> >      ax1.plot(eccen_ra, label="eccentricity", color="pink")
> >      ax1.plot(true_ra,  label="Eqn of Time",  color="black")
> >      ax1.set_title("Equation of Time")
> >      ax1.legend("upper left")
> > 
> >      # Plot the analemma:
> >      ax2 = fig.add_subplot(gs[-1])
> >      ax2.plot(obliq_ra, tde, label="obliquity", color="lightblue")
> >      ax2.plot(eccen_ra, tde, label="eccentricity", color="pink")
> >      ax2.plot(true_ra,  tde, label="analemma", color="black")
> >      ax2.set_title("Analemma")
> >      ax2.legend(loc="upper right")
> > 
> >      plt.show()
> > 
> > if __name__ == '__main__':
> >      plot_planet()
> > =======
> > 
> > Here's what I see: http://shallowsky.com/tmp/mpl-legend.jpg
> > Note that the left subplot (ax1) has the legend in the upper right
> > even though I specified upper left, and that the labels are
> > mysteriously u, p, and p -- I can't figure out where those labels
> > are coming from but they're clearly not the ones I specified.
> > 
> > Any idea how I could fix this? Thanks!
> > 
> >          ...Akkana
> > _______________________________________________
> > Matplotlib-users mailing list
> > Matplotlib-users at python.org
> > https://mail.python.org/mailman/listinfo/matplotlib-users
> > 
> 
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