我使用当前版本的http://archive.ics.uci.edu/ml/datasets/Air+quality,我的问题是,我想要创建一个由多个图上绘制的不同特性组成的月度汇总排序的图。
X轴YearMonth 的创建
INPUT:
df['DateTime'] = df['Date'].astype(str) + ' ' + df['Time'].astype(str)
df['DateTime'] = pd.to_datetime(df['DateTime'], format='%m/%d/%Y %H:%M:%S')
print(df['DateTime'].iloc[:2])
OUTPUT:
0 2004-11-23 19:00:00
1 2004-11-23 20:00:00
Name: DateTime, dtype: datetime64[ns]
INPUT:
df['Date'] = pd.to_datetime(df['Date'].astype(str), format='%m/%d/%Y')
df['Year'] = df['DateTime'].map(lambda x: x.year)
print(df['Year'].iloc[:2])
OUTPUT:
0 2004
1 2004
Name: Year, dtype: int64
INPUT:
df['YearMonth'] = pd.to_datetime(df.DateTime).dt.to_period('m')
print(df['YearMonth'].iloc[:2])
OUTPUT:
0 2004-11
1 2004-11
Name: YearMonth, dtype: period[M]目标项目具有相同的结果、格式
我的绘图
plt.figure(figsize=(30,60))
#fig, axes = plt.subplots(1, 1, figsize=(30, 60), dpi=100)
gasList = ['CO_GT', 'C6H6_GT', 'Nox_GT', 'NO2_GT']
for i, col in enumerate(gasList, start=1):
plt.subplot(len(showList), 1, i)
sns.pointplot(x='YearMonth', y=col, hue='Year', data=df)
plt.title(col, y=0.5, loc='right')
#axes.set_xticks(year_month_day)
plt.show()

理想绘图
我正努力实现和这个项目一样的功能

试图解决这个问题,
<class 'pandas.core.frame.DataFrame'>
Int64Index: 9357 entries, 0 to 9356
Data columns (total 17 columns):
# Column Non-Null Count Dtype
--- ------ -------------- -----
0 Date 9357 non-null datetime64[ns]
1 Time 9357 non-null object
2 CO_GT 9357 non-null float64
3 PT08_S1_CO 9357 non-null float64
4 C6H6_GT 9357 non-null float64
5 PT08_S2_NMHC 9357 non-null float64
6 Nox_GT 9357 non-null float64
7 PT08_S3_Nox 9357 non-null float64
8 NO2_GT 9357 non-null float64
9 PT08_S4_NO2 9357 non-null float64
10 PT08_S5_O3 9357 non-null float64
11 T 9357 non-null float64
12 RH 9357 non-null float64
13 AH 9357 non-null float64
14 DateTime 9357 non-null datetime64[ns]
15 Year 9357 non-null int64
16 YearMonth 9357 non-null period[M]
dtypes: datetime64[ns](2), float64(12), int64(1), object(1), period[M](1)
memory usage: 1.3+ MBcol_one_list = df['YearMonth'].tolist()
plt.figure(figsize=(30,60))
gasList = ['CO_GT', 'C6H6_GT', 'Nox_GT', 'NO2_GT']
for i, col in enumerate(gasList, start=1):
plt.subplot(len(showList), 1, i)
sns.pointplot(x='YearMonth', y=col, hue='Year', data=df, order = col_one_list )
plt.title(col, y=0.5, loc='right')
plt.show()plt.figure(figsize=(30,60))
col_two_list = ['2004-03','2004-04', '2004-05', '2004-06', '2004-07', '2004-08', '2004-09', '2004-10', '2004-11','2004-12', '2005-01','2005-02','2005-03', '2005-04']
gasList = ['CO_GT', 'C6H6_GT', 'Nox_GT', 'NO2_GT']
for i, col in enumerate(gasList, start=1):
plt.subplot(len(showList), 1, i)
sns.pointplot(x='YearMonth', y=col, hue='Year', data=df, order = col_two_list )
plt.title(col, y=0.5, loc='right')
plt.show()发布于 2020-09-03 11:46:28
简短回答
生成切入点时,传递排序的 DataFrame (按YearMonth),打印输出应该按照您的意愿进行。
如果没有上述类型的图片,就像你所呈现的那样(错误)。
长答案
我只为2列准备了一个测试输入文件,如下所示:
DateTime CO_GT C6H6_GT
2004-11-01 2.7 12.4
2004-12-01 2.6 10.6
2004-10-01 3.0 13.8
2005-01-01 2.0 9.0
2005-02-01 2.2 8.0
2004-03-01 2.2 10.0
2004-09-01 2.2 12.0
2005-03-01 2.0 8.6
2004-04-01 2.1 10.2
2004-05-01 1.95 10.5
2004-06-01 1.85 10.4
2004-07-01 1.7 10.5
2005-04-01 1.3 4.5
2004-08-01 1.4 6.8然后,我读取它,将DateTime列转换为日期时间类型(尽早,即仅在读取时):
df = pd.read_fwf('Input.csv', widths=[12, 7, 7], parse_dates=[0])第一步是创建“辅助”列:
df['Year'] = df.DateTime.dt.year
df['YearMonth'] = df.DateTime.dt.to_period('m')为了生成图片,我跑了:
gasList = ['CO_GT', 'C6H6_GT']
plt.figure(figsize=(14, 8))
for i, col in enumerate(gasList, start=1):
plt.subplot(len(gasList), 1, i)
sns.pointplot(x='YearMonth', y=col, hue='Year', data=df.sort_values('DateTime'))
plt.title(col, y=0.5, loc='right')
plt.show()结果是:

https://stackoverflow.com/questions/63706303
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