data_calculate_scatters.m File Reference

Detailed Description

Calculates scatter matrices from dataset.

See also

calculate_scatters.m

Definition in file data_calculate_scatters.m.

Go to the source code of this file.

Functions
function	data_calculate_scatters (in data, in flag_modified_s_b, in P)

Function Documentation

function data_calculate_scatters	(	in	data,
		in	flag_modified_s_b,
		in	P
	)

Parameters

data	irdata object
flag_modified_s_b	if 1, S_B will be calculated in an alternative way which is class terms will not be weighet by class sample size, which will cause all classes to have equal importance.
P	penalty matrix to be added to S_W

Returns

[S_B, S_W] Respectively "inter-class scatter matrix" and "within-class scatter matrix"