virtualArrayBuildExprs: Format ExpressionSets as data.frames with identifiers in...
In virtualArray: Build virtual array from different microarray platforms

Description Usage Arguments Details Value Author(s) See Also Examples

This function takes ExpressionSets as input and formats the expression matrix into a data.frame whose identifiers are put into the first column

1	virtualArrayBuildExprs(x)

`x`	An ExpressionSet

This function is normally only called by "virtualArray.ExpressionSet". It can be used, however, to extract the "exprs" slot of an ExpressionSet as a data.frame. At the same time the identifiers (rownames) are saved in column "1" of the data.frame.

The value returned is a data.frame which is based on the expression matrix of the input ExpressionSet.

Andreas Heider

virtualArray-package, virtualArray.ExpressionSet, virtualArrayCompile

## first we need to load dummy data
library(affydata)
data(Dilution)
## we apply RMA to get an ExpressionSet
Dilution <- rma(Dilution,normalize=FALSE)
## now we derive a data.frame from the expression values
new_exprs_data.frame <- virtualArrayBuildExprs(Dilution)
head(new_exprs_data.frame,n=10)