在图中旋转matplotlib的填充功能

Question

I am trying to make a three joint plot. The frame of one of the plots is rotated by 90 degrees with respect to the other and perpendicular to the axis of the other. So I can make a histogram plot in this frame but when I use kde and generate data and use fill to overlay to the hist it won't rotate.

import pylab as plt
import seaborn as sns

from scipy.stats import gaussian_kde
import numpy as np
from astroML.plotting import hist

from mpl_toolkits.axes_grid1 import make_axes_locatable
sns.set_style("ticks")

axScatter = plt.subplot(111)

xmin, xmax = x.min(), x.max()
ymin, ymax = y.min(), y.max()

# Peform the kernel density estimate
xx, yy = np.mgrid[xmin:xmax:100j, ymin:ymax:100j]
positions = np.vstack([xx.ravel(), yy.ravel()])
values = np.vstack([x, y])
kernel = gaussian_kde(values)
f = np.reshape(kernel(positions).T, xx.shape)


axScatter.set_xlim(xmin, xmax)
axScatter.set_ylim(ymin, ymax)
# Contourf plot
cfset = axScatter.contourf(xx, yy, f, cmap='Blues')
## Or kernel density estimate plot instead of the contourf plot
#ax.imshow(np.rot90(f), cmap='Blues', extent=[xmin, xmax, ymin, ymax])
# Contour plot
cset = axScatter.contour(xx, yy, f, colors='k')
# Label plot
axScatter.scatter(x, y, marker='o', s=1, alpha=0.2, color='k')
axScatter.set_aspect('auto')

axScatter.set_xlabel(r'$X$')
axScatter.set_ylabel(r'$Y$')



# create new axes on the right and on the top of the current axes.
divider = make_axes_locatable(axScatter)

axHistx = divider.append_axes("top", size=1.2, pad=0.1, sharex=axScatter)
axHisty = divider.append_axes("right", size=1.2, pad=0.1, sharey=axScatter)

# the scatter plot:
# histograms
kde = gaussian_kde(x)
X_plot = np.linspace(xmin, xmax, 1000)
X_dens = kde.evaluate(X_plot)
axHistx.fill(X_plot, X_dens, fc='#AAAAFF',alpha=0.2)
hist(x, bins='knuth', ax=axHistx, color='black', histtype='step', normed=True)


kde = gaussian_kde(y)
Y_plot = np.linspace(ymin,ymax, 1000)
Y_dens = kde.evaluate(Y_plot)
axHisty.fill(Y_plot, Y_dens, fc='#AAAAFF' ,alpha=0.2)
hist(y, bins='knuth', ax=axHisty, color='black', histtype='step', normed=True, orientation='horizontal')

How can I rotate the fill function in right panel?

Answer 1

You can use the fill_betweenx function of the axHisty axes to do this:

axHisty.fill_betweenx(Y_plot, Y_dens, color='#AAAAFF' ,alpha=0.2)

Note the fill_betweenx doesn't take fc as a kwarg , but does take color .

I modified the scatter_hist.py example from the matplotlib gallery to have histograms and fills in the same style as your plot, and used the fill_betweenx line above, to create this plot: