### Name: pa.calls
### Title: Presence-Absence Calls from Negative Strand Matching Probesets
### Aliases: pa.calls
### Keywords: manip

### ** Examples

## Load example ExpressionSet 
data(gcrma.ExpressionSet)

## Generate Pvals and Pcalls matrices from ExpressionSet, using default cutoffs
PA <- pa.calls(gcrma.ExpressionSet)

## to access the Pcalls and Pvals:
myPcalls <- PA$Pcalls
myPvals <-  PA$Pvals



