如何在水平條形圖 matplotlib 的條內寫入文本？

Question

到目前為止，我的代碼給了我一些看起來像這樣的東西：

如果可能的話，我想自己在酒吧里寫下這樣的東西：

到目前為止，這是我的基本代碼：

我想把Disease放到酒吧里

import matplotlib
from matplotlib import pyplot as plt
import pandas as pd 
import numpy as np

x = [u'Rimegepant',u'Rimegepant',u'Zavegepant',u'Zavegepant',u'Troriluzole',u'Troriluzole',u'Troriluzole',u'Verdiperstat',u'Verdiperstat']

y = [4,3,3,3,2,3,3,3,3]

Disease = ['Acute Treatment of Migraine','Preventive Treatment of Migraine','Acute and Preventive Migraine','Lung Inflammation COVID-19',"Alzheimer's Disease", "OCD", "Spinocerebellar Ataxia", "Multiple System Atrophy", "Amyotrophic Lateral Sclerosis"]

fig, ax = plt.subplots()    
width = 0.75 # the width of the bars 
ind = np.arange(len(y))  # the x locations for the groups
ax.barh(ind, y, width, color="green", align='edge')
ax.set_yticks(ind+width/2)
ax.set_yticklabels(x, minor=False)
plt.xticks(np.arange(5),('Pre-clinical','Phase I','Phase II','Phase III', 'Approved'))
plt.margins(0,0.05)
plt.title('BHVN')
plt.ylabel('Drug')

plt.show()

Answer 1

您可以通過 matplotlib 將文本添加到ax.text()中。

如果你添加

for bar, disease in zip(ax.patches, Disease[::-1]):
    ax.text(0.1, bar.get_y()+bar.get_height()/2, disease, color = 'white', ha = 'left', va = 'center') 

就在代碼中的plt.show()之前，您將獲得：

請注意，我必須顛倒您的Disease列表（使用 [::-1]）以使文本以您在圖像中的方式顯示，否則肌萎縮側索硬化症在頂部，偏頭痛的急性治療在底部。

Function 通用形式來自plt.text(x, y, text) ，所以你看到我將 x 偏移 0.1 並從條形補丁中獲取 y。

有關 function 的更多信息，您可以在此處查看 matplotlib 文檔

Answer 2

這將正常工作：

import matplotlib
from matplotlib import pyplot as plt
import pandas as pd
import numpy as np

x = [u'Rimegepant',u'Rimegepant',u'Zavegepant',u'Zavegepant',u'Troriluzole',u'Troriluzole',u'Troriluzole',u'Verdiperstat',u'Verdiperstat']

y = [4,3,3,3,2,3,3,3,3]

Disease = ['Acute Treatment of Migraine','Preventive Treatment of Migraine','Acute and Preventive Migraine','Lung Inflammation COVID-19',"Alzheimer's Disease", "OCD", "Spinocerebellar Ataxia", "Multiple System Atrophy", "Amyotrophic Lateral Sclerosis"]
Disease.reverse()
fig, ax = plt.subplots()
width = 0.75 # the width of the bars
ind = np.arange(len(y))  # the x locations for the groups
bar_plot = ax.barh(ind, y, width, color="green", align='edge')
ax.set_yticks(ind+width/2)
ax.set_yticklabels(x, minor=False)
plt.xticks(np.arange(5),('Pre-clinical','Phase I','Phase II','Phase III', 'Approved'))

def autolabel(bar_plot):
    for idx,rect in enumerate(bar_plot):
        ax.text(0.25, idx+.25, Disease[idx], color = 'white')
autolabel(bar_plot)

plt.margins(0,0.05)
plt.title('BHVN')
plt.ylabel('Drug')

plt.show()

Answer 3

import matplotlib
from matplotlib import pyplot as plt
import pandas as pd
import numpy as np

x =[u'Rimegepant',u'Rimegepant',u'Zavegepant',u'Zavegepant',u'Troriluzole',u'Troriluzole',u'Troriluzole',u'Verdiperstat',u'Verdiperstat']

y = [4,3,3,3,2,3,3,3,3]

Disease = ['Acute Treatment of Migraine','Preventive Treatment of Migraine','Acute and Preventive Migraine','Lung Inflammation COVID-19',"Alzheimer's Disease", "OCD", "Spinocerebellar Ataxia", "Multiple System Atrophy", "Amyotrophic Lateral Sclerosis"]

fig, ax = plt.subplots()
width = 0.75 # the width of the bars
ind = np.arange(len(y))  # the x locations for the groups

# I changed this line
p1 = ax.barh(ind,y, width, color="green", align='edge')
ax.set_yticks(ind+width/2)
ax.set_yticklabels(x, minor=False)

# I added this line
ax.bar_label(p1, Disease, label_type='center')
plt.xticks(np.arange(5),('Pre-clinical','Phase I','Phase II','Phase III', 'Approved'))
plt.margins(0,0.05)
plt.title('BHVN')
plt.ylabel('Drug')

plt.show()

您需要更改疾病列表的順序才能正確顯示