i am trying to get all the colums of my data frame to be in the same scale..
right now i have something like this... where a is on a 0-1 scale b is on a 100 scale and
Using scale
, if dat
is the name of your data frame:
## for one column
dat$a <- scale(dat$a, center = FALSE, scale = max(dat$a, na.rm = TRUE)/100)
## for every column of your data frame
dat <- data.frame(lapply(dat, function(x) scale(x, center = FALSE, scale = max(x, na.rm = TRUE)/100)))
For a simple case like this, you could also write your own function.
fn <- function(x) x * 100/max(x, na.rm = TRUE)
fn(c(0,1,0))
# [1] 0 100 0
## to one column
dat$a <- fn(dat$a)
## to all columns of your data frame
dat <- data.frame(lapply(dat, fn))
My experience is that this is still unanswered, what if one of the columns had a -2, the current answer would not produce a 0-100 scale. While I appreciate the answer, when I attempted it, I have variables that are -100 to 100 and this left some negative still?
I have a solution in case this applies to you:
rescale <- function(x) (x-min(x))/(max(x) - min(x)) * 100
dat <- rescale(dat)