How to use Python to modify the position to align the main image

Description of the problem

For an image like this, I'd like to set the colorbar on the right to the same height as the main image

methodologies

0. Description of parameters

/stable/api/_as_gen/?highlight=colorbar#

1. (im, fraction=0.046, pad=0.04, shrink=1.0)

The fraction can be adjusted from 0.035-0.046 to find the right size.

However, it may not work when the length and height contrast of the image is too large

2. make_axes_locatable

This is a function from the matplotlib package

from mpl_toolkits.axes_grid1 import make_axes_locatable

im = (data)
divider = make_axes_locatable(())
cax = divider.append_axes("right", size="5%", pad="3%")
(im, cax=cax)

Doesn't work for axes with projection parameters (will report an error), e.g. cartopy's GeoAxes

3. make_axes_locatables upgrades

/questions/18195758/set-matplotlib-colorbar-size-to-match-graph @Matthias

import  as plt
from mpl_toolkits import axes_grid1

def add_colorbar(im, aspect=20, pad_fraction=0.5, **kwargs):
    """Add a vertical color bar to an image plot."""
    divider = axes_grid1.make_axes_locatable()
    width = axes_grid1.axes_size.AxesY(, aspect=1./aspect)
    pad = axes_grid1.axes_size.Fraction(pad_fraction, width)
    current_ax = ()
    cax = divider.append_axes("right", size=width, pad=pad)
    (current_ax)
    return (im, cax=cax, **kwargs)

usage example

im = ((200).reshape((20, 10)))
add_colorbar(im)

4. manually add an axe to the colorbar

/questions/18195758/set-matplotlib-colorbar-size-to-match-graph @Fei Yao

import  as plt
import numpy as np

fig=()
ax = ()
im = ((100).reshape((10,10)))

# Create an axes for colorbar. The position of the axes is calculated based on the position of ax.
# You can change 0.01 to adjust the distance between the main image and the colorbar.
# You can change 0.02 to adjust the width of the colorbar.
# This practice is universal for both subplots and GeoAxes.

cax = fig.add_axes([ax.get_position().x1+0.01,ax.get_position().y0,0.02,ax.get_position().height])
(im, cax=cax) # Similar to (im, cax = cax)

Effective demonstration

summarize

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