To change imshow colorbar label size in matplotlib, there is the tick_params function, example

`#!/usr/bin/env python`

`import numpy as np`

`import matplotlib.pyplot as plt`

`def f(x,y):`

`return (x+y)*np.exp(-5.0*(x**2+y**2))`

`x,y = np.mgrid[-1:1:100j, -1:1:100j]`

`z = f(x,y)`

`plt.imshow(z,extent=[-1,1,-1,1])`

`cb = plt.colorbar()`

`cb.ax.tick_params(labelsize=7)`

`plt.savefig("imshow_colorbar_labelsize_02.png")`

`plt.show()`

### References

Links | Site |
---|---|

tick_params | matplotlib.org |

matplotlib.pyplot.imshow | matplotlib.org |

Python matplotlib decrease size of colorbar labels | stackoverflow |