我想在网格中绘制一系列seaborn热图。我知道子图的数量(可以是奇数或偶数)。 热图将显示平均占有率"星期几"星期几" (y轴)和"一天中的小时" (x轴),例如它们都共享相同的x / y域。
这是我目前的代码:
plt.savefig(figname,fotmat=figtype)
非常感谢任何提示
答案 0 :(得分:2)
您可以更灵活,只需为每个存在的名称创建一个轴,如下所示:
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
import seaborn as sns
import string
days = ['Mon','Tue','Wed','Thurs','Fri','Sat','Sun']
names = [string.lowercase[i] for i in range(22)]
nItems = 1000
df = pd.DataFrame()
df['name'] = [names[i] for i in np.random.randint(0,len(names),nItems)]
df['openLots'] = np.random.randint(0,100,nItems)
df['occupationRatio'] = np.random.randint(0,100,nItems)
df['DoW'] = [days[i] for i in np.random.randint(0,7,nItems)]
df['Hour'] = np.random.randint(0,12,nItems)
fig = plt.figure(figsize=(12,12))
for index, name in enumerate(names):
ax = fig.add_subplot(4,6,index+1)
dfn = df.loc[df.name==name]
dfn = dfn.groupby(['DoW','Hour']).mean()['occupationRatio'].unstack()
dfn = dfn.reindex(days)
# Now we can operate on each plot axis individually
if index%6!=5: #i.e.
# Don't draw a colorbar
sns.heatmap(data = dfn, cmap='coolwarm', ax=ax, cbar=False)
else:
sns.heatmap(data = dfn, cmap='coolwarm', ax=ax)
if index%6!=0:
# Remove the y-axis label
ax.set_ylabel('')
ax.set_yticks(())
ax.set_title(name)
fig.tight_layout()
fig.show()
答案 1 :(得分:1)
sharey = True
作为plt.subplots
的参数来完成。cbar = False
参数seaborn.heatmap
以便不显示颜色条。根据子图的实际数量,这可以作为绘图函数的输入给出。 删除"空图"在最后一行,因为奇数总数
在创建绘图的循环之后,您可以添加另一个循环来移除未使用的轴。
for j in range(len(locations), ncols*nrows):
axs[j].axis("off")
这是一个完整的例子(我借用了鳕鱼从@Robbie生成数据帧):
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np
import seaborn as sns
days = ['Mon','Tue','Wed','Thurs','Fri','Sat','Sun']
names = ["Parkhaus {:02}".format(i+1) for i in range(22)]
nItems = 1000
df = pd.DataFrame()
df['name'] = [names[i] for i in np.random.randint(0,len(names),nItems)]
df['openLots'] = np.random.randint(0,100,nItems)
df['occupationRatio'] = np.random.rand(nItems)
df['DoW'] = [days[i] for i in np.random.randint(0,7,nItems)]
df['Hour'] = np.random.randint(0,12,nItems)
df2 = df[['name','openLots','occupationRatio','DoW','Hour']]
nrows = 4; ncols=6
fig, axs = plt.subplots(nrows=nrows, ncols=ncols, figsize=(15,9), sharey=True)
axs = axs.flatten()
locations = df2['name'].sort_values().unique()
def occupation_heatmap (name, ax, cbar=False, ylabel=False):
dfn = df2[df2['name'] == name]
dfn = dfn.groupby(['DoW', 'Hour']).mean()['occupationRatio'].unstack()
dfn = dfn.reindex(['Mon', 'Tue', 'Wed','Thu','Fri','Sat','Sun'])
sns.heatmap(data=dfn, cmap="coolwarm", vmin=0, vmax=1.0, ax=ax, cbar=cbar)
ax.set_title(name)
plt.setp(ax.get_yticklabels(), rotation=0)
if not ylabel: ax.set_ylabel("")
for i, n in enumerate(locations):
occupation_heatmap (n, axs[i], cbar=i%ncols==ncols-1, ylabel=i%ncols==0)
for j in range(len(locations), ncols*nrows):
axs[j].axis("off")
plt.tight_layout()
plt.show()