Hello, Angus!

For this method, if I want to draw a colorbar to indicate the specific values

for the colors, what should I do? the colorbar() in pylab is not waorking for

this case.

Thanks,

Wang Jun

于 2011/7/3 8:48, matplotlib-users-request@lists.sourceforge.net 写道:

## ···

On 1 July 2011 14:35, Francois Lemery<francois.lemery@...287...> wrote:

> Hello,

>

> I am interested in producing a 4 dimensional plot to represent some data.

>

> I picture this as looking like a normal 3d scatter plot with datapoints

> varying in a color scale which depends on a fourth column of data.

>

> Could anyone help me with this- I have searched google and the matplotlib

> website and have only found some documentation for a MatLab solution bywhich

> I am not interested.

>

> Thank you kindly!

> -FrancoisHow about this?

from mpl_toolkits.mplot3d import Axes3D

import matplotlib.pyplot as plt

import numpy as npfig = plt.figure()

ax = fig.add_subplot(111, projection='3d')x = np.random.standard_normal(100)

y = np.random.standard_normal(100)

z = np.random.standard_normal(100)

c = np.random.standard_normal(100)ax.scatter(x, y, z, c=c, cmap=plt.hot())

plt.show()Angus.

-- AJC McMorland Post-doctoral research fellow Neurobiology, University of Pittsburgh