How to convert time (mm:ss) to decimal form in R

Question

I\'ve imported a csv-file to R using RStudio where I am trying to plot points per game against minutes per game. However the minutes per game is in the format mm:ss and I\'m

Answer 1

Some tuning of first solution:

minPerGame <- paste(sample(1:89,100000,T),sample(0:59,100000,T),sep=":")

f1 <- function(){
sapply(strsplit(minPerGame,":"),
 function(x) {
  x <- as.numeric(x)
  x[1]+x[2]/60
 }
)
}
#
f2<- function(){
 w <- matrix(c(1,1/60),ncol=1)
 as.vector(matrix(as.numeric(unlist(strsplit(minPerGame,":"))),ncol=2,byrow=TRUE)%*%w)
}

system.time(f1())
system.time(f2())

system.time(f1()) user system elapsed 0.88 0.00 0.86

system.time(f2()) user system elapsed 0.25 0.00 0.27