pandas で scatter matrix

pandas (Python Data Analysis Library)
http://pandas.pydata.org/

iris データを対象として scatter matrix を描画した。

>>> from pandas import *
>>> from pandas.tools.plotting import *
>>> import matplotlib.pyplot as plt
>>> data = read_csv('iris.csv')
>>> scatter_matrix(data)
array([[Axes(0.125,0.7;0.19375x0.2), Axes(0.31875,0.7;0.19375x0.2),
Axes(0.5125,0.7;0.19375x0.2), Axes(0.70625,0.7;0.19375x0.2)],
[Axes(0.125,0.5;0.19375x0.2), Axes(0.31875,0.5;0.19375x0.2),
Axes(0.5125,0.5;0.19375x0.2), Axes(0.70625,0.5;0.19375x0.2)],
[Axes(0.125,0.3;0.19375x0.2), Axes(0.31875,0.3;0.19375x0.2),
Axes(0.5125,0.3;0.19375x0.2), Axes(0.70625,0.3;0.19375x0.2)],
[Axes(0.125,0.1;0.19375x0.2), Axes(0.31875,0.1;0.19375x0.2),
Axes(0.5125,0.1;0.19375x0.2), Axes(0.70625,0.1;0.19375x0.2)]], dtype=object)
>>> plt.show()

適当にやったところ，"class" 列は文字列のためか，勝手に除いてくれた。