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edwindj / ffbase

Basic (statistical) functionality for R package ff
github.com/edwindj/ffbase/wiki
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Column bind function for two ffdf: cbind.ffdf #36

Open AudreyKarsons opened 10 years ago

AudreyKarsons commented 10 years ago

Example code:

library(ff)
ff1 <- as.ffdf(data.frame(letA = letters[1:5], numA = 1:5))
ff2 <- as.ffdf(data.frame(letB = letters[6:10], numB = 6:10))

cbind.ffdf <- function(d1, d2){
D1names <- colnames(d1)
D2names <- colnames(d2)
mergeCall <- do.call("ffdf", c(physical(d1), physical(d2)))
colnames(mergeCall) <- c(D1names, D2names)
mergeCall
}

cbind.ffdf(ff1, ff2)[,]