パンダの時系列/日付機能を設定する

Question

パンダで周波数をTime Series/Date functionalityに設定するときは、大文字または小文字を使用するのと同じですか？

freq = 'd'またはfreq = 'D'を使用すると同じですか？

Offset Aliases 

A number of string aliases are given to useful common time series frequencies. We will refer to these aliases as offset aliases. 

Alias Description 
B business day frequency 
C custom business day frequency 
D calendar day frequency 
W weekly frequency 
M month end frequency 
SM semi-month end frequency (15th and end of month) 
BM business month end frequency 
CBM custom business month end frequency 
MS month start frequency 
SMS semi-month start frequency (1st and 15th) 
BMS business month start frequency 
CBMS custom business month start frequency 
Q quarter end frequency 
BQ business quarter end frequency 
QS quarter start frequency 
BQS business quarter start frequency 
A, Y year end frequency 
BA, BY business year end frequency 
AS, YS year start frequency 
BAS, BYS business year start frequency 
BH business hour frequency 
H hourly frequency 
T, min minutely frequency 
S secondly frequency 
L, ms milliseconds 
U, us microseconds 
N nanoseconds 

Answer 1

文書ではすべてoffset-aliasesを確認してください。

それが同じであれば、私は小さなチェックをしてみてください。

L= ['B','D','W','M','Q','H','T','S'] 

rng = pd.date_range('2017-04-03', periods=10) 
df = pd.DataFrame({'a': range(10)}, index=rng) 
print (df) 

for x in L: 
    a = df.resample(x.lower()).ffill() 
    b = df.resample(x).ffill() 
    print ((a == b).all()) 

a True 
dtype: bool 
a True 
dtype: bool 
a True 
dtype: bool 
a True 
dtype: bool 
a True 
dtype: bool 
a True 
dtype: bool 
a True 
dtype: bool 
a True 
dtype: bool