search for: ff_matrix

...nr, ncols)) namb <- vector(mode="character", length=ncols) x <- 1 for(i in 1:(nc-1)){ for(j in (i+1):nc){ b[,x] <- a[,i]+a[,j] namb[x] <- paste(i, "_", j, sep="") x <- x+1 } } dimnames(b)[[2]] <- namb After the above step I need to convert my ff_matrix to a data.frame to discretize the whole matrix and calculate the mutual information. The calculated result should be saved as an ffdf-object or something similar. require(infotheo) disc <- as.ffdf(discretize(as.data.frame(as.ffdf(cc)), disc="equalwidth", nbins=5)) This won't work...

Hello, I frequently have to export a large quantity of data from some source (for example, a database, or a hand-written perl script) and then read it into R. This occasionally takes a lot of time; I'm usually using read.table("filename",comment.char="",quote="") to read the data once it is written to disk. However, I *know* that the program that generates

Hello Everyone,   Learning about R and its wonderful array of functions. If it's not obvious, I usually try to find out what a function stands for. I think this helps me remember better.   One function that has me stumped is "sink." Can anyone tell me if this stands for something?   Thanks,   Paul         __________________________________________________ [[alternative HTML