so4gp.gradual_patterns.GI

class GI(attr_col, symbol)

Parameters:

• attr_col (int) – Column index

• symbol (str) – Variation symbol either “+” or “-”

__init__(attr_col, symbol)

GI (Gradual Item). A class that is used to create GI objects. A GI is a pair (i,v) where is a column, and v is a variation symbol - increasing/decreasing. Each column of a data set yields 2 GIs; for example, column age yields GI age+ or age-.

>>> import so4gp as sgp
>>> gradual_item = sgp.GI(1, "+")
>>> print(gradual_item.to_string())
1+

Parameters:

• attr_col (int) – Column index

• symbol (str) – Variation symbol either “+” or “-”

Methods

__init__(attr_col, symbol)	GI (Gradual Item).
from_string(gi_str)	Creates a GI from a string like '1+', '12-', or '125+'
parse_gi(gi_str)	Converts a stringified GI into normal GI.
swap_gi_symbol(gi_obj)	Inverts a GI symbol to the opposite variation (i.e., from - to +; or, from + to -) :return: inverted GI object
to_string()	Returns a GI in string format :return: string

Attributes

as_tuple	The Gradual Item (GI) in tuple format
attribute_col	The column index of a GI
symbol	The variation symbol of a GI