如何使用 sns.kdeplot() 从热图中删除白色 shade/color？我只想要红色

Question

from mplsoccer.pitch import Pitch
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns
from scipy.stats import kde
from scipy.ndimage import gaussian_filter
from copy import copy
np.random.seed(19680801)

plt.style.use('dark_background')

fields = ['id', 'minute', 'result', 'X1', 'Y','xG','h_a','situation','season',
          'shotType','X']
df=pd.read_csv('shots.csv', skipinitialspace=True, usecols=fields)
fig, ax = pitch.draw()
sns.kdeplot(df.Y, df.X,shade=True, ax=ax, cmap='Reds',
              shade_lowest=False,levels=20,kernel='gau',gridsize=50,
              bw='scott',cut=0,cbar=True,)
ax.set_xlim(ax.get_xlim()[::-1])        # invert the axis
ax.yaxis.tick_right()  
plt.axis('off')
plt.show()

值 df.X 和 df.Y 介于 (0,1) 之间。我只想要红色部分。在 matplotlib 中，我使用 vmin 参数消除了白色部分。这里可以做什么？

编辑：再想一想，如果颜色图从附图中的 12 开始，白色区域将被消除。所以颜色图从红色开始，以深红色结束。这就是我想要的。

Answer 1

我会使用这种方法从您的颜色图中挑选颜色：

from matplotlib import cm
from matplotlib.colors import ListedColormap

# select 42 colours from the "Reds" cmap
red_selection = cm.get_cmap("Reds", 42)

# select half of the colours, closest to Red and assign to a new colormap
red_cmap = ListedColormap(red_selection(range(42))[21:, :])

from mplsoccer.pitch import Pitch
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns
from scipy.stats import kde
from scipy.ndimage import gaussian_filter
from copy import copy
np.random.seed(19680801)

plt.style.use('dark_background')

fields = ['id', 'minute', 'result', 'X1', 'Y','xG','h_a','situation','season',
          'shotType','X']
df=pd.read_csv('shots.csv', skipinitialspace=True, usecols=fields)
fig, ax = pitch.draw()
sns.kdeplot(df.Y, df.X,shade=True, ax=ax, cmap=red_cmap,
              shade_lowest=False,levels=20,kernel='gau',gridsize=50,
              bw='scott',cut=0,cbar=True,)
ax.set_xlim(ax.get_xlim()[::-1])        # invert the axis
ax.yaxis.tick_right()  
plt.axis('off')
plt.show()

如何使用 sns.kdeplot() 从热图中删除白色 shade/color？我只想要红色

How to remove the white shade/color from the heatmap using sns.kdeplot()? I just want the red color

python

matplotlib

seaborn

heatmap

density-plot