Invert secondary Y axis?

[dartdog]

I have two variables (that are inversely correlated and I'm using the secondary plot axis on the right ie

df.total.plot()

df.UnemplRt.plot(secondary_y=True, style='g')

But I'd like the secondary_y to be inverted To show the correlation better.

I see in matplotlib there is plt.gca().invert_yaxis() 

Can I use that somehow?

[Skipper Seabold]

That should work AFAIK. You might need to call draw_if_interactive to have it show up.

Something like this should also work and is a bit more explicit.

ax = df.a.plot()

ax = df.b.plot(secondary_y=True, style='g', ax=ax)

ax.invert_yaxis()

If you're working interactively, you might need to call

plt.draw_if_interactive()

Skipper

[dartdog]

Perfect, I did not realize I needed to assign the plot to ax

so this did it as suggested

ax=df.total.plot()

ax=df.UnemplRt.plot(secondary_y=True, style='g')

ax.invert_yaxis()

[dartdog]

Darn It is inverting the primary Y not the secondary, how do I target the secondary?

[Skipper Seabold]

On Tue, Jan 22, 2013 at 6:39 PM, dartdog <tombr...@gmail.com> wrote:

Darn It is inverting the primary Y not the secondary, how do I target the secondary?

Hmm, right. Since pandas decided to return the axes instead of the figure, you need to get the figure.

ax = df.a.plot()

ax = df.b.plot(secondary_y=True, style='g', ax=ax)

fig = ax.get_figure()

fig.axes[1].invert_yaxis()

plt.draw_if_interactive()

Skipper

 

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[dartdog]

great, thanks!