search for: aframe2

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2011 Feb 28
2
converting the string columns in a data.frame to factors?
...rying to convert the string columns in aframe1 to factors. But it seems stringsAsFactors=T in as.data.frame() doesn't do anything. Could anybody let know what is the correct way to converting strings to factors? > aframe1=data.frame(x=LETTERS[1:10], y=LETTERS[1:10], stringsAsFactors=F) > aframe2=as.data.frame(aframe1, stringsAsFactors=T) > > str(aframe1) 'data.frame': 10 obs. of 2 variables: $ x: chr "A" "B" "C" "D" ... $ y: chr "A" "B" "C" "D" ... > str(aframe2) 'data.frame': 10 o...
2010 Feb 03
3
How to flatten a tree (based on list) to a certain depth?
...following list of lists of frames 'root' (let's call it a 'tree' of frames). I want to flatten it to be a list of frames. However, if I unlist(root), it will flatten the frames as well. Is there a simply way to flatten the tree to certain depth? aframe1=data.frame(x=1:3,y=1:3) aframe2=data.frame(u=7:9,v=11:13) aframe3=data.frame(p=3:5,q=6:8) main1=list(sub1=aframe1, sub2=aframe2) main2=list(sub3=aframe3) root=list(main1=main1, main2=main2) str(root) unlist(root)