Error message in R 'x' must be numeric principal component analysis

Sunday, May 11, 2014

I have imported the csv file into R, but R didn't recognize the first column is row.names.

I have tried to copy mtcars data to excel and then convert to csv file, using

df<- read.csv("E:/mtcars_test.csv",header=TRUE, quote="\"")

import successfully, test whether it is data.frame = true

when run pc <-prcomp(df, centre = TRUE, Scale = TRUE)

then error message show -X must be numeric. data set didn't have any null value.

Thanks Addamo