定制 plotly create_scattermatrix 图

Question

简单调用 plotly 的 figure_factory 例程来创建散点矩阵：

import pandas as pd
import numpy as np
from plotly import figure_factory

df = pd.DataFrame(np.random.randn(40,3))
fig = figure_factory.create_scatterplotmatrix(df, diag='histogram')
fig.show()

产量

我的问题是：

如何为所有绘图指定一种颜色？
如何为散点图上的三个变量分别设置坐标轴范围？
有没有办法创建直方图的密度（归一化）版本？
有没有办法在非对角线图的右上角包含相关系数（例如，从 df.corr() 计算）？

Answer 1

第一次改成相同颜色，更新生成的图表数据中的marker属性颜色；修改第二个散点图的轴范围，以相同的方式更新生成的数据；由于只有 x-axis 被修改，如有必要，对 y-axis 使用相同的技术；更改为第三个直方图的规范化版本要更改为第三个直方图的规范化版本，请将其替换为规范化数据。要替换的数据是参考文献中示例规范中完成的数据。如果这没有达到归一化，我相信可以用 np.histogram() 等获得的数据替换它。第四个是注释，但我已经添加了 df.corr() 获得的数据使用图形数据参考，按每个子图的轴名称指定数据。

import pandas as pd
import numpy as np
from plotly import figure_factory
np.random.seed(20220529)

df = pd.DataFrame(np.random.randn(40,3))
density = px.histogram(df, x=[0,1,2], histnorm='probability density')
df_corr = df.corr()

fig = figure_factory.create_scatterplotmatrix(df, diag='histogram', height=600, width=600)

# 1.How can I specify a single color for all the plots?
for i in range(9):
    fig.data[i]['marker']['color'] = 'blue'

# 2.How can I set the axes ranges for each of the three variables on the scatter plot?
for axes in ['xaxis2','xaxis3','xaxis4','xaxis6','xaxis7']: 
    fig.layout[axes]['range']=(-4,4)

# 3.Is there a way to create a density (normalized) version of the histogram? 
fig['data'][0]['histnorm'] = 'probability density'
fig['data'][4]['histnorm'] = 'probability density'
fig['data'][8]['histnorm'] = 'probability density'


# 4.Is there a way to include the correlation coefficient (say, computed from df.corr())
# in the upper right corner of the non-diagonal plots?
for r,x,y in zip(df_corr.values.flatten(),
                 ['x1','x2','x3','x4','x5','x6','x7','x8','x9'],
                 ['y1','y2','y3','y4','y5','y6','y7','y8','y9']):
    if r == 1.0:
        pass
    else:
        fig.add_annotation(x=3.3, y=2, xref=x, yref=y, showarrow=False, text='R:'+str(round(r,2)))

fig.show()

定制 plotly create_scattermatrix 图

customization of plotly create_scattermatrix plots

python

scatter-plot

plotly