I have a dataframe with several double type varaibles.
I tried to code the normalization by myself, by it seems mean() function do not consume non-numeric type data.
I planned to normalize the columns into minimal value 0 and maximum value 1, so the built in function scale() don't work for me. And I also have an Date column that need to be neglected.
Is there any normalize function that I could do this easily? Thank you!