Holoviews点击相关热图和回归图流 [英] Holoviews tap stream of correlation heatmap and regression plot
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问题描述
我想为DataFrame制作一个关联热图,并为每对变量制作一个回归图.我已经尝试阅读所有文档,但是仍然很难连接两个图,因此当我点击热图时,可以显示相应的回归图.
I want to make a correlation heatmap for a DataFrame and a regression plot for each pair of the variables. I have tried to read all the docs and am still having a very hard time to connect two plots so that when I tap the heatmap, the corresponding regression plot can show up.
下面是一些示例代码:
import holoviews as hv
from holoviews import opts
import seaborn as sns
import numpy as np
import pandas as pd
hv.extension('bokeh')
df = sns.load_dataset('tips')
df = df[['total_bill', 'tip', 'size']]
corr = df.corr()
heatmap = hv.HeatMap((corr.columns, corr.index, corr))\
.opts(tools=['tap', 'hover'], height=400, width=400, toolbar='above')
m, b = np.polyfit(df.tip, df.total_bill, deg=1)
x = np.linspace(df.tip.min(), df.tip.max())
y = m*x + b
curve = hv.Curve((x, y))\
.opts(height=400, width=400, color='red', ylim=(0, 100))
points = hv.Scatter((df.tip, df.total_bill))
hv.Layout((points * curve) + heatmap).cols(2)
推荐答案
I adjusted the relevant parts of the docs http://holoviews.org/reference/streams/bokeh/Tap.html with your code. Maybe this clears up your confusion.
import pandas as pd
import numpy as np
import holoviews as hv
from holoviews import opts
hv.extension('bokeh', width=90)
import seaborn as sns
# Declare dataset
df = sns.load_dataset('tips')
df = df[['total_bill', 'tip', 'size']]
# Declare HeatMap
corr = df.corr()
heatmap = hv.HeatMap((corr.columns, corr.index, corr))
# Declare Tap stream with heatmap as source and initial values
posxy = hv.streams.Tap(source=heatmap, x='total_bill', y='tip')
# Define function to compute histogram based on tap location
def tap_histogram(x, y):
m, b = np.polyfit(df[x], df[y], deg=1)
x_data = np.linspace(df.tip.min(), df.tip.max())
y_data = m*x_data + b
return hv.Curve((x_data, y_data), x, y) * hv.Scatter((df[x], df[y]), x, y)
tap_dmap = hv.DynamicMap(tap_histogram, streams=[posxy])
(heatmap + tap_dmap).opts(
opts.Scatter(height=400, width=400, color='red', ylim=(0, 100), framewise=True),
opts.HeatMap(tools=['tap', 'hover'], height=400, width=400, toolbar='above'),
opts.Curve(framewise=True)
)
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