Script Programming(스크립트 프로그래밍)

#!/usr/bin/env python

"""
An example which plots the parametirized curve.
         Plot the Descartes' folium.
"""

import numpy as np
from matplotlib.pyplot import figure, show, rc, title

# radar green, solid grid lines
rc('grid', color='#316931', linewidth=1, linestyle='-')
rc('xtick', labelsize=15)
rc('ytick', labelsize=15)

# force square figure and square axes looks better for polar, IMO
fig = figure(figsize=(8,8))
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8], polar=False, axisbg='#d5de9c')

t = np.arange(0.0, 27.0, 0.05)
x =3*t/(1 + t**3)
y =3*t**2/(1 + t**3)
ax.plot(x, y, color='#ee8d18', lw=3, label='a line')
ax.legend()

t = np.arange(-18, -1.15, 0.05)
x =3*t/(1 + t**3)
y =3*t**2/(1 + t**3)
ax.plot(x, y, color='#ee8d18', lw=3, label='a line')

t = np.arange(-0.82, 0.01, 0.05)
x =3*t/(1 + t**3)
y =3*t**2/(1 + t**3)
ax.plot(x, y, color='#ee8d18', lw=3, label='a line')
# ax.legend()

title("Descartes' folium")
show()

#set terminal to windows
set term win

set contour
splot x**3 + y**3 - 3*x*y

#set discrete levels
set cntrparam levels discrete 0
set title "Descartes' folium"
unset surface

#show contour setting
# show contour
set isosamples 100
set view 0,0

# set the line color to black
set linetype 1 lc rgb "dark-violet" lw 2 pt 0
set linetype 2 lc rgb "sea-green"   lw 2 pt 7
set linetype 3 lc rgb "cyan"        lw 2 pt 6 pi -1
set linetype 4 lc rgb "dark-red"    lw 2 pt 5 pi -1
set linetype 5 lc rgb "blue"        lw 2 pt 8
set linetype 6 lc rgb "dark-orange" lw 2 pt 3
set linetype 7 lc rgb "black"       lw 2 pt 11
set linetype 8 lc rgb "goldenrod"   lw 2
set linetype cycle 8
replot

         Plot the Descartes' folium.
"""
import matplotlib
import numpy as np
import matplotlib.pyplot as plt

delta = 0.025
x = np.arange(-6.0, 6.0, delta)
y = np.arange(-6.0, 6.0, delta)
X, Y = np.meshgrid(x, y)
Z = X**3 + Y**3 - 3*X*Y

# Set negative contours to be solid iine.
matplotlib.rcParams['contour.negative_linestyle'] = 'solid'
plt.figure()
CS = plt.contour(X, Y, Z, 1, colors='k')
plt.title("Descartes' folium")

plt.show()

#!/usr/bin/env python

from pylab import *
import matplotlib.pyplot as plt

x = arange(-8.0, 2.0, 0.01)

plot(x, (x**2)*exp(x), '-')
grid(True)
xlabel('x')
ylabel('y')

# set the rectangular range to be viewed.
plt.axis([-8, 2, -2.0, 15.0])

show()

#!/usr/bin/env python

from pylab import *
import matplotlib.pyplot as plt

x = arange(-2.0*pi, 2.0*pi, 0.01)

plot(x, sin(1/x), '-')
grid(True)
xlabel('x')
ylabel('y')

# set the rectangular range to be viewed.
plt.axis([-2*pi, 2*pi, -1.5, 1.5])

show()

#!/usr/bin/env python

from pylab import *
import matplotlib.pyplot as plt

x = arange(-2.0*pi, 2.0*pi, 0.01)

plot(x, sin(x**2), '-')
grid(True)
xlabel('x')
ylabel('y')

# set the rectangular range to be viewed.
plt.axis([-2*pi, 2*pi, -1.5, 1.5])

show()