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"""

==========

matplotlib

==========

Thanks to Tony Yu <tsyu80@gmail.com> for the logo design

"""

import numpy as np

import matplotlib as mpl

import matplotlib.pyplot as plt

import matplotlib.cm as cm

mpl.rcParams['xtick.labelsize'] = 10

mpl.rcParams['ytick.labelsize'] = 12

mpl.rcParams['axes.edgecolor'] = 'gray'

axalpha = 0.05

figcolor = 'white'

dpi = 80

fig = plt.figure(figsize=(6, 1.1), dpi=dpi)

fig.figurePatch.set_edgecolor(figcolor)

fig.figurePatch.set_facecolor(figcolor)

def add_math_background():

ax = fig.add_axes([0., 0., 1., 1.])

text = []

text.append(

(r"$W^{3\beta}_{\delta_1 \rho_1 \sigma_2} = "

r"U^{3\beta}_{\delta_1 \rho_1} + \frac{1}{8 \pi 2}"

r"\int^{\alpha_2}_{\alpha_2} d \alpha^\prime_2 "

r"\left[\frac{ U^{2\beta}_{\delta_1 \rho_1} - "

r"\alpha^\prime_2U^{1\beta}_{\rho_1 \sigma_2} "

r"}{U^{0\beta}_{\rho_1 \sigma_2}}\right]$", (0.7, 0.2), 20))

text.append((r"$\frac{d\rho}{d t} + \rho \vec{v}\cdot\nabla\vec{v} "

r"= -\nabla p + \mu\nabla^2 \vec{v} + \rho \vec{g}$",

(0.35, 0.9), 20))

text.append((r"$\int_{-\infty}^\infty e^{-x^2}dx=\sqrt{\pi}$",

(0.15, 0.3), 25))

text.append((r"$F_G = G\frac{m_1m_2}{r^2}$",

(0.85, 0.7), 30))

for eq, (x, y), size in text:

ax.text(x, y, eq, ha='center', va='center', color="#11557c",

alpha=0.25, transform=ax.transAxes, fontsize=size)

ax.set_axis_off()

return ax

def add_matplotlib_text(ax):

ax.text(0.95, 0.5, 'matplotlib', color='#11557c', fontsize=65,

ha='right', va='center', alpha=1.0, transform=ax.transAxes)

def add_polar_bar():

ax = fig.add_axes([0.025, 0.075, 0.2, 0.85], projection='polar')

ax.axesPatch.set_alpha(axalpha)

ax.set_axisbelow(True)

N = 7

arc = 2. * np.pi

theta = np.arange(0.0, arc, arc/N)

radii = 10 * np.array([0.2, 0.6, 0.8, 0.7, 0.4, 0.5, 0.8])

width = np.pi / 4 * np.array([0.4, 0.4, 0.6, 0.8, 0.2, 0.5, 0.3])

bars = ax.bar(theta, radii, width=width, bottom=0.0)

for r, bar in zip(radii, bars):

bar.set_facecolor(cm.jet(r/10.))

bar.set_alpha(0.6)

for label in ax.get_xticklabels() + ax.get_yticklabels():

label.set_visible(False)

for line in ax.get_ygridlines() + ax.get_xgridlines():

line.set_lw(0.8)

line.set_alpha(0.9)

line.set_ls('-')

line.set_color('0.5')

ax.set_yticks(np.arange(1, 9, 2))

ax.set_rmax(9)

if __name__ == '__main__':

main_axes = add_math_background()

add_polar_bar()

add_matplotlib_text(main_axes)

plt.show()

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