[R] lapply function

Sarah Goslee sarah.goslee at gmail.com
Sat May 30 13:51:53 CEST 2015

You need the vectorizes ifelse() instead of if().

Also watch out for order of operations in the last line, and there is
already a base R function named scale(). And spelling of arguments, of

On Saturday, May 30, 2015, Sohail Khan <sohail13 at gmail.com> wrote:

> Hi R Gurus,
> I am writing a simple function that take a numeric vector column from a
> data frame and scales the vector column with certain criteria.  I would
> then pass this function to a list of dataframes by lappy.
> Question is how do I write a function that works on a numeric vector.  My
> function as is, seems to work on the first element of the vector.
> I.E.
> scale
> function(x,mn,max){
> if (x==min(x)) 0
> if (x==max(x)) 10
> else x=max-min/10
> }
> where x is the numeric column of the dataframe.
> Thank you.

Sarah Goslee

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