[BioC] sigpathway pheno object

[Adrian Johnson]

Hi:
In sigPathways package, if I have characters for defining a pheno
object, how is sigPathway treating the class labels based on pheno
object.

for example:

my.pheno <- c('normal', 'cancer','normal','normal','cancer')

now when I "runSigPathway" on the data matrix, how is sigPathway
considers to computer t-statistic. Normal/cancer or cancer/normal.

similarly, if I define binary vector for pheno class lable, is 1/0
considered or 0/1 considered.

thank you.
Ad