Matplotlib colorbar ticks on left/opposite side

Question

One could generate a vertical colorbar like so(simplified):

import matplotlib.pyplot as plt
import matplotlib as mpl

plt.figure()
c_ax=plt.subplot(111)
cb =          


        

Answer 1

I was having the same problem. This situation probably arises when you are setting explicitly the axes of the colorbar. In that case you can easily specify on what side of these axes you get the the ticks and the labels. For example, if you have created an image using imshow

fig = plt.figure()
ax = plt.subplot(1, 1, 1)
im = ax.imshow(data)

You can define the axis for the colorbar, in this example using inset_axes:

from mpl_toolkits.axes_grid1.inset_locator import inset_axes
cbaxes = inset_axes(ax, width="7%", height="20%", loc=4)

then add your colorbar

cb = fig.colorbar(im, cax=cbaxes, ticks=[vmin, vmax], orientation='vertical')

and then control the position of the ticks, etc...

cbaxes.yaxis.tick_left()