Pandas DataFrame: first() function
DataFrame - first() function
The first() function is used to convenience method for subsetting initial periods of time series data based on a date offset.
Syntax:
DataFrame.first(self, offset)
Parameters:
| Name | Description | Type/Default Value | Required / Optional |
|---|---|---|---|
| offset | string, DateOffset, dateutil.relativedelta | Required |
Returns: subset - same type as caller
Raises: TypeError
If the index is not a DatetimeIndex
Example:
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