matrix not seen as numeric R

dataframe, matrix, r

Solution

use

dims <- dim(m)
m <- as.numeric(m)
dim(m) <- dims

Probably want to wrap the above in a function

`as.matrix` will not necessarily convert any arbitrary data.frame to numeric. eg:

x <- data.frame(LETTERS)
m <- as.matrix(x)
is.numeric(x) 
# [1] FALSE
is.character(x) 
# [1] TRUE

Problem

So I converted my data frame to as.matrix(df): ``` m<-as.matrix(df) ``` But then: ``` > is.numeric(m) [1] FALSE ``` I even tried to see if a certain single factor in the matrix is numeric: ``` > is.numeric(m[15,15]) [1] FALSE ``` Anyone else had this happen?

Original source