geost.accessor.GeostFrame.select_by_condition#

GeostFrame.select_by_condition(condition: Any, invert: bool = False) → DataFrame[source]#

Do a condition-based selection on the DataFrame or GeoDataFrame: return the rows in the data where the ‘condition’ evaluates to True, see examples below.

Parameters:

  • condition (list, pd.Series or array like) – Boolean array like object with locations at which the values will be preserved, dtype must be ‘bool’ and the length must correspond with the length of the data.

  • invert (bool, optional) – If True, the selection is inverted so rows that evaluate to False will be returned. The default is False.

Returns:

New DataFrame containing only the data selected by this method.

Return type:

pd.DataFrame

Examples

Select rows in data that contain a specific value:

>>> selection = data.gst.select_by_condition(data["lith"] == "V")

Or select rows in the data that contain a specific (part of) string or strings:

>>> selection = data.gst.select_by_condition(data["column"].str.contains("foo|bar"))

Or select rows in the data based on multiple conditions:

>>> selection = data.gst.select_by_condition((data["column1"] > 2) & (data["column2] < 1))