| SOM Toolbox | Online documentation | http://www.cis.hut.fi/projects/somtoolbox/ |
sig = som_drsignif(sigmea,Cm)
SOM_DRSIGNIF Significance measure from confusion matrix between two clusters and a rule.
sig = som_drsignif(sigmea,Cm)
sigmea (string) significance measure: 'accuracy',
'mutuconf' (default), or 'accuracyI'.
(See definitions below).
Cn Vectorized confusion matrix, or a matrix of such vectors.
(vector) [a, c, b, d] (see below)
(matrix) [[a1,c1,b1,d1], ..., [an,cn,bn,dn]]
sig (vector) length=n, significance values
The confusion matrix Cm below between group (G) and contrast group (not G)
and rule (true - false) is used to determine the significance values:
G not G
--------------- accuracy = (a+d) / (a+b+c+d)
true | a | b |
|-------------- mutuconf = a*a / ((a+b)(a+c))
false | c | d |
--------------- accuracyI = a / (a+b+c)
See also SOM_DREVAL, SOM_DRMAKE.