标准化 R 中的数字列

Question

I need to normalize all numeric columns of the data frame clean_mlb.

Here is a picture of clean_mlb (Photo #1)

This is the code that I wrote:

scaled_mlb = data.frame(scale(clean_mlb))

And this is the error that I got:

Error in colMeans(x, na.rm = TRUE) : 'x' must be numeric

Answer 1

Find out columns which are numeric and then apply scale on those columns.

cols <- sapply(clean_mlb, is.numeric)
clean_mlb[cols] <- scale(clean_mlb[cols])