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Summary

Description
English: The Poinsot's spiral given by the parametric equation with .
Date
Source Own work
Author Krishnavedala
Other versions File:Poinsot2.PNG
SVG development
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This plot was created with Matplotlib.
Source code
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Python code

Source code 
from numpy import linspace, append
from math import sinh, sin, cos, pi
from matplotlib.pyplot import *
from mpl_toolkits.axes_grid.axislines import SubplotZero

fig = figure(figsize=(4,4))
ax = SubplotZero(fig,111)
fig.add_subplot(ax)
ax.grid(True)
ax.set_xticks([-2,-1,0,1,2])
ax.set_yticks([-1.5,-.5,.5,1.5,2.5])
ax.set_ylim(-1,2.75)
ax.set_xlim(-2,2)
for direction in ["xzero","yzero"]:
	ax.axis[direction].set_axisline_style("-|>")
	ax.axis[direction].set_visible(True)
for direction in ["left","right","bottom","top"]:
	ax.axis[direction].set_visible(False)

theta = linspace(-4*pi,4*pi,150)
X, Y = [],[]
for x in theta:
	X = append(X,cos(x)/sinh(x/3.))
	Y = append(Y,sin(x)/sinh(x/3.))
ax.plot(X,Y)

ax.text(2,0.1,r"x")
ax.text(-0.5,2.75,r"y")
#fig.show()
fig.savefig("Poinsot2.svg",bbox_inches="tight",\
	pad_inches=.15)

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GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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inception

4 June 2011

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Date/TimeThumbnailDimensionsUserComment
current12:52, 4 June 2011Thumbnail for version as of 12:52, 4 June 2011319 × 314 (19 KB)Krishnavedala{{Information |Description ={{en|1=The Poinsot's spiral given by the parametric equation <math>r = \mathrm{csch}\left(\theta/3\right)</math> with <math>-4\pi\leq\theta\leq4\pi</math>. Created using [[:w:python (programming lan

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