R compute percentage values in data frame

Question

My question today refers to a data frame I\'m working on in R. The header of the data frame looks like the following: String(unique), Integer N[0-23]

Those 24 Integ

Answer 1

Use prop.table on a matrix containing the values:

x <- data.frame(id=letters[1:3],val0=1:3,val1=4:6,val2=7:9)
prop.table(as.matrix(x[-1]),margin=1)
           val0      val1      val2
[1,] 0.08333333 0.3333333 0.5833333
[2,] 0.13333333 0.3333333 0.5333333
[3,] 0.16666667 0.3333333 0.5000000

Edit: A fully working example:

tt=read.table("topichitsperhod.csv",sep=",",header=TRUE)  
tt=na.omit(tt[-1])
pt=prop.table(tt[-1],margin=NULL)

First column is being left out because it held the topic strings.