R version 2.15.3 (2013-03-01) -- "Security Blanket"
Copyright (C) 2013 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)

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> x <- array(list(m,-6.5,m,-7.33,m,49.33,m,-11,f,-2.67,m,-8.33,m,9,f,9.67,m,2.33,m,-12.3,f,-6,m,5.67,f,28.33,f,12,m,-2,f,-11.3,m,1.33,f,3,f,-4.67,f,-5,m,-13,f,2.33,f,37.67,f,7.5,f,5,m,-5.67,m,-4,f,30,f,15.33,m,2),dim=c(2,30),dimnames=list(c('SEX','RAD'),1:30))
Error in array(list(m, -6.5, m, -7.33, m, 49.33, m, -11, f, -2.67, m,  : 
  object 'm' not found
Execution halted