Displaying 2 results from an estimated 2 matches for "ffrowapply".
2009 Apr 03
1
bigglm "update" with ff
Hi, since bigglm doesn't have update, I was wondering how to achieve
something like (similar to the example in ff package manual using biglm):
first <- TRUE
ffrowapply ({
if (first) {
first <- FALSE
fit <- bigglm(eqn, as.data.frame(bigdata[i1:i2,,drop=FALSE]), chunksize =
10000, family = binomial())
} else {
fit <- update(fit, as.data.frame(bigdata[i1:i2,,drop=FALSE]), chunksize =
10000, family = binomial())
}
}, X=bigdata, VERBOSE = TRUE...
2007 Nov 02
0
applying duplicated, unique and match to lists?
...names(x)[MARGIN]
}
}else{
i <- id(x, fromLast = fromLast, hashFUN=hashFUN)
}
i
}
# xx this is yet without a final identity check agains md5 collisions
# row identity for ff and R matrices (less overhead compared to id.ff via ffapply )
ffrowid <- function(x, ...){
id(ffrowapply(x, apply(x[i1:i2,,drop=FALSE], 1, md5), return="unlist", use.names=FALSE, ...))
}
if (FALSE){
a <- ff(0, dim=c(100000,10),dimorder=2:1)
ffapply(a, a[i1:i2]<-runif(i2-i1+1))
r <- ffrowhash(a)
}
if (FALSE){
n <- 100000
m <- 10
x <- ff(0, dim=c(n,m))
x[,dim...