Re: [R] Converting a dataframe to a matrix

Hi: Below works but it's extremely ugly and overly complicated. i'm sure someone else will send you something better and I'll be waiting also. Also, the way I named the rows and columns works for below but it won't hold in the general case if you don't have nice ordered names like you do below.

Re: [R] Converting a dataframe to a matrix

xtabs is your friend: xtabs(likes ~ color + name, data=dat) color nameblue green red jake 1 1 0 sally1 1 0 tom 0 0 1 See ?xtabs for more info. Note that I changed the "likes?" column to just "likes". It is a bad idea to have question marks in varia

[R] Converting a dataframe to a matrix

If I have a dataframe which is organized like this: name color likes? 1 sally red0 2 sally blue1 3 sally green1 4 jake red0 5 jake blue1 6 jake green1 7 tom red1 8 tom blue0 9 tom green0 And I want to create a matrix in the form: red