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extracting parts of words or extraxting letter to use in ifelse-func.

hey Joe,
I had a quick look at your code. In this line:

b2$PRRSvac <- ifelse(b2$status=="MS-X, PRRS-pos"|b2$status=="R?d
SPF+Myc+Ap2+DK+Vac",1,0)

some special characters are used. You must use only plain ascii characters
Hope this help.

Cheers,

Patrizio

2009/2/13 joe1985 <johannes at dsr.life.ku.dk>: