vastorbit.VastFrame.at_time¶

VastFrame.at_time(ts: str, time: Annotated[str | timedelta, 'Time Interval']) → VastFrame¶

Filters the VastFrame by only keeping the records at the input time.

Parameters:

ts (str) – TS (Time Series) VastColumn used to filter the data. The VastColumn type must be date (date, datetime, timestamp…).
time (TimeInterval) – Input Time. For example, time = ‘12:00’ will filter the data when time(‘ts’) is equal to 12:00.

Returns:

self

Return type:

VastFrame

Examples

We import vastorbit:

import vastorbit as vo

Hint

By assigning an alias to vastorbit, we mitigate the risk of code collisions with other libraries. This precaution is necessary because vastorbit uses commonly known function names like “average” and “median”, which can potentially lead to naming conflicts. The use of an alias ensures that the functions from vastorbit are used as intended without interfering with functions from other libraries.

For this example, we will use a dummy time-series data:

vdf = vo.VastFrame(
    {
        "time": [
            "1993-11-03 00:00:00",
            "1993-11-03 00:00:01",
            "1993-11-03 00:00:02",
            "1993-11-04 00:00:01",
            "1993-11-04 00:00:02",
        ],
        "val": [0., 1., 2., 4., 5.],
    }
)["time"].astype("timestamp")

	📅 time Timestamp(3)	123 val Decimal(2, 1)
1	1993-11-04 00:00:01	4.0
2	1993-11-03 00:00:02	2.0
3	1993-11-04 00:00:02	5.0
4	1993-11-03 00:00:01	1.0
5	1993-11-03 00:00:00	0.0

Rows: 1-5 | Columns: 2

Note

vastorbit offers a wide range of sample datasets that are ideal for training and testing purposes. You can explore the full list of available datasets in the Datasets, which provides detailed information on each dataset and how to use them effectively. These datasets are invaluable resources for honing your data analysis and machine learning skills within the vastorbit environment.

In the above data, we have values for two dates. We can use the at_time filter to get the required time-stamp values:

vdf.at_time(ts = "time", time = "00:00:01")

	📅 time Timestamp(3)	123 val Decimal(2, 1)
1	1993-11-03 00:00:01	1.0
2	1993-11-04 00:00:01	4.0

Rows: 2 | Columns: 2