[Matplotlib-users] Role of numpy Method arange in Matplotlib

[JonBL <jc....@bi...>]

I'm unsure about the role of numpy method arange in Matplotlib plots. All
Matplotlib examples I have seen call numpy's method arange, and pass the
result as the first arg to Matplotlib's plot method.

But the following works as expected:

--- quote ---
import matplotlib.pyplot as plt
import numpy as np

dom = 	[1, 3, 4, 5, 7]		# Plot domain on x-axis in ascending order of values
ran = 	[7, -2, 11, 5.8, 0]	# Plot range on y-axis in 1-to-1 correspondence
with domain items

fig = plt.figure()
ax = plt.subplot(111)
ax.plot(dom, ran)
plt.grid()
plt.show()
--- end quote ---

I'm not calling  numpy.arange(arg) here, but I see the expected plot of 5
co-ordinate points. When should I use numpy.arange(arg) instead of what I
have done above? Something to do with the domain that I want to include in
the plot?

TIA,
  Jon


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