相关疑难解决方法(0)

如何在散景中制作相关热图？

import pandas as pd
import bokeh.charts

df = pd.util.testing.makeTimeDataFrame(1000)
c = df.corr()

p = bokeh.charts.HeatMap(c) # not right

# try to make it a long form
# (and it's ugly in pandas to use 'index' in melt)

c['x'] = c.index
c = pd.melt(c, 'x', ['A','B','C','D'])

# this shows the right 4x4 matrix, but values are still wrong
p = bokeh.charts.HeatMap(c, x = 'x', y = 'variable', values = 'value') 

顺便说一句，我可以在侧面制作一个颜色条，而不是情节中的图例吗？以及如何选择颜色范围/映射，例如深蓝色（-1）到白色（0）到深红色（+1）？