每周vs天python的seaborn热图 [英] seaborn heat map for week vs day python
问题描述
我需要生成一个热图,在这里我必须将天安排为列,将week_num安排为行,绿色安排为正日,红色安排为负日.它应该每天和每周都有休息.
I need to generate a heat map Where I have to arrange days as columns and week_num as rows and Green for a positive day and red for the negative day. It should have break for each day and each week.
我尝试使用seaborn库,但无法成功绘制.有人可以帮我吗?
I have tried using seaborn library but couldn't succeed in plotting this. Can anyone help me with this?
week_num day color_code
1 2020-05-01 red
1 2020-05-02 green
2 2020-05-05 red
2 2020-05-06 red
3 2020-05-13 green
3 2020-05-14 green
3 2020-05-15 red
推荐答案
我猜您指的是星期几,否则它将是一个非常奇怪的热图.您可以尝试以下操作,基本上是在data.frame这样的操作中,将星期几作为另一列,然后将其转换为宽格式并作图.sns.heatmap不接受分类值,因此您需要将其替换为0,1并在图例中相应地标记它们:
I am guessing you refer to the day of the week, otherwise it will be a really weird heatmap. You can try something like below, basically in something like your data.frame, get the day of week as another column, then pivot this into a wide format and plot. sns.heatmap does not take in categorical values so you need to replace this with 0,1 and label them accordingly in the legend:
import pandas as pd
import numpy as np
import seaborn as sns
import matplotlib.pyplot as plt
dates = pd.date_range(start='1/1/2018', periods=60, freq='1D')
color_code = np.random.choice(['green','red'],60)
df = pd.DataFrame({'dates':dates ,'color_code':color_code})
df['week_num'] = df['dates'].dt.strftime("%W")
df['day_num'] = df['dates'].dt.weekday
fig, ax = plt.subplots(1, 1, figsize = (5, 3))
df_wide = df.pivot_table(index='week_num',columns='day_num',values='color_code',
aggfunc=lambda x:x)
sns.heatmap(df_wide.replace({'green':0,'red':1}),cmap=["#2ecc71","#e74c3c"],
linewidths=1.0,ax=ax)
colorbar = ax.collections[0].colorbar
colorbar.set_ticks([0.25,0.75])
colorbar.set_ticklabels(['green','red'])
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