calculate_scatters.m File Reference

Detailed Description

Calculates scatter matrices from X and classes.

Definition in file calculate_scatters.m.

Go to the source code of this file.

Functions
function	calculate_scatters (in X, in classes, in flag_modified_s_b, in P)

Function Documentation

function calculate_scatters	(	in	X,
		in	classes,
		in	flag_modified_s_b,
		in	P
	)

Parameters

X	[no]x[nf] matrix
classes	[no]x[1] matrix
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"