Displaying 3 results from an estimated 3 matches for "ihasnext".
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2010 Jan 14
0
itertools 0.1-1
...he "itertools" package is strongly inspired by the Python itertools
module, and includes a number of functions of the same name. There are
a variety of functions that create iterators for splitting, chunking,
repeating, recycling, zipping, and filtering your data. There is also
an "ihasNext" function, written by Hadley Wickham, that adds a "hasNext"
method to any iterator, making it easier to get values from an iterator
without the use of the "foreach" function. Hadley also contributed some
utility functions for writing your own iterators.
- Steve Weston
__...
2010 Jan 14
0
itertools 0.1-1
...he "itertools" package is strongly inspired by the Python itertools
module, and includes a number of functions of the same name. There are
a variety of functions that create iterators for splitting, chunking,
repeating, recycling, zipping, and filtering your data. There is also
an "ihasNext" function, written by Hadley Wickham, that adds a "hasNext"
method to any iterator, making it easier to get values from an iterator
without the use of the "foreach" function. Hadley also contributed some
utility functions for writing your own iterators.
- Steve Weston
__...
2013 Jul 23
0
Function apply
...140,replace=TRUE),nrow=140)
#either
res1<-do.call(rbind,lapply(split(as.data.frame(X),((seq_len(nrow(X))-1)%/%10)+1),function(x) apply(x,2,mean)))
#or
?res2<-t(sapply(split(as.data.frame(X),((seq_len(nrow(X))-1)%/%10)+1),colMeans))
?identical(res1,res2)
#[1] TRUE
#orlibrary(itertools)
it<-ihasNext(isplitRows(X,chunkSize=10))
?while(hasNext(it)){
?print( apply(nextElem(it),2,mean))
?}
#[1] 23.4 29.1 31.5
#[1] 28.2 21.8 17.2
#[1] 14.3 24.3 36.4
#[1] 22.2 25.2 24.2
#[1] 28.5 22.6 27.3
#[1] 19.6 25.6 20.0
#[1] 25.7 16.3 27.9
#[1] 20.0 24.8 26.7
#[1] 26.3 30.0 33.0
#[1] 21.9 24.0 32.3
#[1] 25.6 2...