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<p><a href="https://i.stack.imgur.com/vd0le.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vd0le.png" alt="enter image description here"/></a>
这是调色板,seaborn在默认情况下使用带有分类变量的列为分散点着色。<br/>
<strong>有没有办法获取所用调色板的名称或颜色?</strong>
我在一开始就得到了这个配色方案,但一旦我在绘图中使用了一个diff方案,我就不能在同一个图表中使用这个调色板。
这不是来自<code>sns.color_palette</code>的方案。这也可以是matplotlib颜色方案</p>
<p><strong>最小可再现示例</strong></p>
<pre><code>import pandas as pd
import numpy as np
import seaborn as sns
import matplotlib.pyplot as plt
import plotly.express as px
# download data
df = pd.read_csv("https://www.statlearning.com/s/Auto.csv")
df.head()
# remove rows with "?"
df.drop(df.index[~df.horsepower.str.isnumeric()], axis=0, inplace=True)
df['horsepower'] = pd.to_numeric(df.horsepower, errors='coerce')
# plot 1 (gives the desired color-palette)
fig = sns.PairGrid(df, vars=df.columns[~df.columns.isin(['cylinders','origin','name'])].tolist(), hue='cylinders')
plt.gcf().set_size_inches(17,15)
fig.map_diag(sns.histplot)
fig.map_upper(sns.scatterplot)
fig.map_lower(sns.kdeplot)
fig.add_legend(ncol=5, loc=1, bbox_to_anchor=(0.5, 1.05), borderaxespad=0, frameon=False);
# plot 2
# Converting column cylinder to factor before using for 'color'
df.cylinders = df.cylinders.astype('category')
# Scatter plot - Cylinders as hue
pal = ['#fdc086','#386cb0','#beaed4','#33a02c','#f0027f']
col_map = dict(zip(sorted(df.cylinders.unique()), pal))
fig = px.scatter(df, y='mpg', x='year', color='cylinders',
color_discrete_map=col_map,
hover_data=['name','origin'])
fig.update_layout(width=800, height=400, plot_bgcolor='#fff')
fig.update_traces(marker=dict(size=8, line=dict(width=0.2,color='DarkSlateGrey')),
selector=dict(mode='markers'))
fig.show()
# plot 1 run again
fig = sns.PairGrid(df, vars=df.columns[~df.columns.isin(['cylinders','origin','name'])].tolist(), hue='cylinders')
plt.gcf().set_size_inches(17,15)
fig.map_diag(sns.histplot)
fig.map_upper(sns.scatterplot)
fig.map_lower(sns.kdeplot)
fig.add_legend(ncol=5, loc=1, bbox_to_anchor=(0.5, 1.05), borderaxespad=0, frameon=False);
</code></pre>