[R] undefined columns selected!

chalabi.elahe at yahoo.de chalabi.elahe at yahoo.de
Wed May 4 15:05:26 CEST 2016

Hi all,
I know it seems simple but I am trying to copy a code and I don't know what is the problem with this command!


the error I get is : error in '[.data.frame '(msub, ,cn) : undefined columns selected 
Thanks for any help,

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