在Seaborn热图中将标题移动到颜色条上方

Question

我在Seaborn制作了热图，我有一个相应的水平颜色条。我已经为颜色条添加了一个标题，但是当我真正想要它时，标题会出现在颜色条下方。有什么可以改变这个的原因吗？是否可以更改标题的字体大小和颜色栏上标签的大小？

fig, ax = plt.subplots(figsize=(30,12))
graph = sns.heatmap(df_pivot, cmap="Blues", linecolor="white", linewidths=0.1, 
            cbar_kws={"orientation": "horizontal", "shrink":0.40, "aspect":40, "label": "Number of accidents"})


ax.set_title("Number of traffic accidents per day & hour combination", 
fontsize=30, fontweight="bold")

from matplotlib import rcParams
rcParams['axes.titlepad'] = 70 # Space between the title and graph

locs, labels = plt.yticks() # Rotating row labels
plt.setp(labels, rotation=0) # Rotating row labels

ax.xaxis.tick_top() # x axis on top
ax.xaxis.set_label_position('top')

graph.tick_params(axis='both',labelsize=15) # Tick label size
graph

这是迄今为止的样子。我希望“事故数”标题高于彩条，但低于热图。我希望颜色条与热图一样宽。

Answer 1

在此示例中单独绘制颜色条。欲了解更多信息，请阅读评论：

import matplotlib.pyplot as plt
import numpy as np; np.random.seed(0)
import seaborn as sns; sns.set()

flights = sns.load_dataset("flights")
flights = flights.pivot("month", "year", "passengers")

# set height ratios of heatmap and coresponding colorbar
# hspace shows space between plots
# adjust hspace to put your title of colorbar correctly
grid_kws = {"height_ratios": (.9, .05), "hspace": .15}
f, (ax, cbar_ax) = plt.subplots(2, gridspec_kw=grid_kws, figsize=(30,12))
ax = sns.heatmap(flights, ax=ax,
    cbar_ax=cbar_ax,
    cbar_kws={"orientation": "horizontal","label": "Number of accidents"})

# set title and set font of title
ax.set_title("Number of traffic accidents per day & hour combination", 
fontsize=30, fontweight="bold")

# set font size of colorbar labels
cbar_ax.tick_params(labelsize=25) 

plt.show()