[英]How can I order dates and show only month+year on the x axis in matplotlib?
我想改进我的比特币数据集,但我发现日期排序不正确,只想显示月份和年份。 我该怎么做?
data = Bitcoin_Historical['Price']
Date1 = Bitcoin_Historical['Date']
train1 = Bitcoin_Historical[['Date','Price']]
#Setting the Date as Index
train2 = train1.set_index('Date')
train2.sort_index(inplace=True)
cols = ['Price']
train2 = train2[cols].apply(lambda x: pd.to_numeric(x.astype(str)
.str.replace(',',''), errors='coerce'))
print (type(train2))
print (train2.head())
plt.figure(figsize=(15, 5))
plt.plot(train2)
plt.xlabel('Date', fontsize=12)
plt.xlim(0,20)
plt.ylabel('Price', fontsize=12)
plt.title("Closing price distribution of bitcoin", fontsize=15)
plt.gcf().autofmt_xdate()
plt.show()
结果如下图所示:
它未订购并显示所有日期。 我想按月+年排序,只显示月名+年。 那怎么办?
数据示例:
谢谢
尝试将您的“日期”列转换为日期时间,检查它是否有效:
train1.Date = pd.to_datetime(train1.Date)
train2 = train1.set_index('Date')
我对您的代码进行了以下修改:
Date
列转换为日期时间类型Price
列并转换为浮动plt.xlim(0,20)
请尝试以下代码:
import pandas as pd
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
pd.options.mode.chained_assignment = None
Bitcoin_Historical = pd.read_csv('data.csv')
train1 = Bitcoin_Historical[['Date','Price']]
train1['Date'] = pd.to_datetime(train1['Date'], infer_datetime_format=True, errors='coerce')
train1['Price'] = train1['Price'].str.replace(',','').str.replace(' ','').astype(float)
train2 = train1.set_index('Date') #Setting the Date as Index
train2.sort_index(inplace=True)
print (type(train2))
print (train2.head())
ax = train2.plot(figsize=(15, 5))
ax.xaxis.set_major_locator(mdates.MonthLocator(interval=1))
ax.xaxis.set_major_formatter(mdates.DateFormatter('%Y-%b'))
plt.xlabel('Date', fontsize=12)
plt.ylabel('Price', fontsize=12)
plt.title("Closing price distribution of bitcoin", fontsize=15)
plt.show()
Output
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