Python 关于 Pandas 'Freq' 标签的文档在哪里？
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Where is the documentation on Pandas 'Freq' tags?
提问by sundowner
I am new to Pandas, and am trying to use date_range. I came across all kinds of good things for freq, like BMEand BMSand I would like to be able to quickly look up the proper strings to get what I want. Yesterday I found a nicely formatted table somewhere in the documentation, but the title of the table was so obtuse that I can not use search to find it again today.
我是 Pandas 的新手，正在尝试使用date_range. 我遇到了各种各样的好东西freq，比如BME和BMS，我希望能够快速查找正确的字符串来获得我想要的东西。昨天我在文档的某处找到了一个格式很好的表格，但是表格的标题太钝了，我今天无法使用搜索再次找到它。
采纳答案by jezrael
You can find it called Offset Aliases:
你可以找到它叫做Offset Aliases：
A number of string aliases are given to useful common time series frequencies. We will refer to these aliases as offset aliases (referred to as time rules prior to v0.8.0).
为有用的常见时间序列频率提供了许多字符串别名。我们将这些别名称为偏移别名（在 v0.8.0 之前称为时间规则）。
Alias Description
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, min minutely frequency
S secondly frequency
L, ms milliseonds
U, us microseconds
N nanoseconds
But later it can be better:
但以后可能会更好：
DOC: more complete docs on offsets/frequencies needed #8438
DOC: in docstrings point users to valid offset aliases #3324
