cancer " data set " in Breast cancer diagnosis

for the program in this link http://read.pudn.com/downloads197/sourcecode/macos/928928/CancerDiagnosis.m__.htm

the parameter " cancer " is not defined in the file , however, the program is running ?

does that mean that " cancer " is built in somehow ?

Answer 1

[Geoff Hayes]

Mohamed - the variable cancer is an input parameter to several functions. For example,

 function [Arbol taux] = arbol_training(trainmat,Arbol,cancer,taux)

where arbol_training is called as

 Arbol =arbol_training(trainmat,Arbol,cancertrain,taux);

with cancertrain being initialized a few lines above.