How to add different graphs (as an inset) in another python graph [duplicate]

Question

I'd like to make a graph like that:

the problem is, I've got the data from some external files, and I can make the background graph, but I have no idea how to add another graph inside of the one that I already have and change the data to have different results in both of them:

Below I am adding the code I am using to do the background graph. Hope someone can help.

from __future__ import division import numpy as np import matplotlib.pyplot as plt  plt.rc('text',usetex=True) font = {'family':'serif','size':16} plt.rc('font',**font) plt.rc('legend',**{'fontsize':14})  matplotlib.rcParams['text.latex.preamble']=[r'\usepackage{amsmath}']  data=np.loadtxt(r'C:\...\file.txt') plt.plot(data[:,0],data[:,6],linewidth = 3,label='B$_0$ = 1.5 T d',linestyle= '--', color='black')  plt.show() 

Answer 1

There's more than one way do to this, depending on the relationship that you want the inset to have.

If you just want to inset a graph that has no set relationship with the bigger graph, just do something like:

import matplotlib.pyplot as plt  fig, ax1 = plt.subplots()  # These are in unitless percentages of the figure size. (0,0 is bottom left) left, bottom, width, height = [0.25, 0.6, 0.2, 0.2] ax2 = fig.add_axes([left, bottom, width, height])  ax1.plot(range(10), color='red') ax2.plot(range(6)[::-1], color='green')  plt.show() 

If you want to have some sort of relationship between the two, have a look at some of the examples here: http://matplotlib.org/1.3.1/mpl_toolkits/axes_grid/users/overview.html#insetlocator

This is useful if you want the inset to be a "zoomed in" version, (say, at exactly twice the scale of the original) that will automatically update as you pan/zoom interactively.

For simple insets, though, just create a new axes as I showed in the example above.

Answer 2

You can do this with inset_axes method (see docs):

from mpl_toolkits.axes_grid1.inset_locator import inset_axes inset_ax = inset_axes(parent_axes,                     width="30%", # width = 30% of parent_bbox                     height=1., # height : 1 inch                     loc=3) 

See this example for a full demo.