DataFrame中resample函数时间戳筛选

例如

dataframe.resample('M',how=np.mean) # 按照每个月求平均值

dataframe.resample('M',how=np.median) # 按照月求中位数

最新的计算方式如下：

data = df.loc[:,['total_purchase_amt','total_redeem_amt']].resample('D').apply(np.sum) # 计算dataframe名称为total_purchase_amt与total_redeem_amt两列数据按照天求和的结果

 

其中第一个参数的解释

B       business day frequency

C       custom business day frequency (experimental)

D       calendar day frequency

W       weekly frequency

M       month end frequency

BM      business month end frequency

CBM     custom business month end frequency

MS      month start frequency

BMS     business month start frequency

CBMS    custom business month start frequency

Q       quarter end frequency

BQ      business quarter endfrequency

QS      quarter start frequency

BQS     business quarter start frequency

A       year end frequency

BA      business year end frequency

AS      year start frequency

BAS     business year start frequency

BH      business hour frequency

H       hourly frequency

T       minutely frequency

S       secondly frequency

L       milliseonds

U       microseconds

N       nanoseconds