P.smooth()

Description:

The external library function (See External Library Guide) performs smoothing on a table sequence/record sequence variable of a table sequence/ record sequence during modeling.

Sytnax:

P.smooth(cn, T)

During modeling, perform smoothing on high-frequency categorical enumerated variable cn and return a binary sequence containing the smoothing result and the smoothing records Rec

P.smooth@r(cn, Rec)

During scoring, perform smoothing on multiclassification enumerated variable cn according to Rec, the smoothing process records, and return the smoothing result

Parameter:

P

A table sequence/record sequence

T

A sequence of target variable values

cn

A string/number, which is the name of column (or the column number starting from 1) – the to-be-pre-processed variable – in a table sequence or record sequence

Rec

A sequence of smoothing process records

Option:

@c

Modify the original data to the smoothing result after execution

@bnie

Each option specifies a target type, and options are mutual-exclusive; automatically judge the type when no option is used; the order of priorities of the options is binary, numeric, integer and enumerated

Return value:

A sequence

Example:

 

A

 

1

=file("D:// titanic.csv").import@qtc()

Import the modeling data.

2

=file("D:// titanic_t.csv").import@qtc()

Import the scoring data.

3

=A1.smooth@ic("Ticket",A1.(Survived))

Smooth variable “Ticket” and return the smoothing result and the smoothing process records Rec.

4

=A2.smooth@rc("Ticket",A3(2))

Map the corresponding variable in the scoring data set according to A3’s smoothing process records.