使用python3环境

import matplotlib.gridspec as gridspec
import matplotlib.pyplot as plt

import numpy as np
import matplotlib as mpl
#mpl.use('pgf')

def figsize(scale, nplots = 1):
    fig_width_pt = 390.0                          # Get this from LaTeX using \the\textwidth
    inches_per_pt = 1.0/72.27                       # Convert pt to inch
    golden_mean = (np.sqrt(5.0)-1.0)/2.0            # Aesthetic ratio (you could change this)
    fig_width = fig_width_pt*inches_per_pt*scale    # width in inches
    fig_height = nplots*fig_width*golden_mean              # height in inches
    fig_size = [fig_width,fig_height]
    return fig_size

pgf_with_latex = {                      # setup matplotlib to use latex for output
    "pgf.texsystem": "xelatex",        # change this if using xetex or lautex
    "text.usetex": True,                # use LaTeX to write all text
    "font.family": "serif",
    "font.serif": [],                   # blank entries should cause plots to inherit fonts from the document
    "font.sans-serif": [],
    "font.monospace": [],
    "axes.labelsize": 10,               # LaTeX default is 10pt font.
    "font.size": 10,
    "legend.fontsize": 8,               # Make the legend/label fonts a little smaller
    "xtick.labelsize": 8,
    "ytick.labelsize": 8,
    "figure.figsize": figsize(1.0),     # default fig size of 0.9 textwidth
    "pgf.preamble": "\n".join([
        r"\usepackage[utf8x]{inputenc}",    # use utf8 fonts becasue your computer can handle it :)
        r"\usepackage[T1]{fontenc}",        # plots will be generated using this preamble
        ]),
    }
mpl.rcParams.update(pgf_with_latex)

# gs2 = gridspec.GridSpec(1, 2)
# gs2.update(top=1-2/3-0.05, bottom=0, left=0.15, right=0.85, wspace=0.0)

ax = plt.subplot()
ax.axis('off')
s1 = r'$\begin{tabular}{ |c|c| }  \hline Correct PDE & $u_t + u u_x + 0.0025 u_{xxx} = 0$ \\  \hline Identified PDE (clean data) & '
s2 = r'$u_t + %.3f u u_x + %.7f u_{xxx} = 0$ \\  \hline ' % (0.5,0.5)
s3 = r'Identified PDE (1\% noise) & '
s4 = r'$u_t + %.3f u u_x + %.7f u_{xxx} = 0$  \\  \hline ' % (0.15, 0.2)
s5 = r'\end{tabular}$'
s = s1+s2+s3+s4+s5
ax.text(-0.1,0.2,s)

结果如下