import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0.0, a, b)
for i in range(d):
y1 = f1(x, p1_i, p2_i)
y2 = f2(x, p1_i, p2_i)
plt.scatter(x, y1, c=color[i])
plt.plot(x, y2, '-', c=color[i]
my question:
how can I setup color to be d colors from some colormap (like cm.copper or cm.jet), they should be somewhat "equally" spaced… maybe the loop is not ideal, but I don't know a better way (yet)…
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0.0, a, b)
for i in range(d):
y1 = f1(x, p1_i, p2_i)
y2 = f2(x, p1_i, p2_i)
plt.scatter(x, y1, c=color[i])
plt.plot(x, y2, '-', c=color[i]
my question:
how can I setup color to be d colors from some colormap (like cm.copper or cm.jet), they should be somewhat "equally" spaced… maybe the loop is not ideal, but I don't know a better way (yet)…
Thanks for your help,
Cheers,
Claus
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I agree with Sterling that the colors api page has a great deal of useful info. However, as another solution to your problem, keep in mind that the predefined colormaps contained in matplotlib.pyplot.cm return color tuples when called with a float between 0 and 1. To illustrate with an extension of your example code, try the following:
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0,10,25) # Your x values
A list of parameters for generating the y values
p = np.linspace(1,10,5)
An array of values between 0 and 1 with the same length as your parameter list.
d = np.linspace(0, 1, 5)
for i,j in zip(p,d):
y = np.sin(x*i)
plt.scatter(x, y, color=plt.cm.copper(j))
plt.plot(x, y, color=plt.cm.jet(j))
plt.show()
If you have a lot of parameters, hence a large number of plots, you might want to start reading up on collections: http://matplotlib.org/api/collections_api.html
My understanding is that collections plot faster than many repeated calls to plt.plot or plt.scatter. I’ve used LineCollection to plot a large number of lines: I don’t know which collection to use for repeated scatter plots, though.
Good luck
Ryan
···
On Thu, Nov 15, 2012 at 12:49 PM, Sterling Smith <smithsp@…3304…> wrote:
how can I setup color to be d colors from some colormap (like cm.copper or cm.jet), they should be somewhat “equally” spaced… maybe the loop is not ideal, but I don’t know a better way (yet)…
Thanks for your help,
Cheers,
Claus
Monitor your physical, virtual and cloud infrastructure from a single
web console. Get in-depth insight into apps, servers, databases, vmware,
SAP, cloud infrastructure, etc. Download 30-day Free Trial.
Pricing starts from $795 for 25 servers or applications!