[R] Invert the sign of a number

Fran100681 franaruto at hotmail.it
Thu Oct 29 11:06:45 CET 2009


just a simple question

How can I do to invert the sign of a number? (for example: -4 to 4, 2 to -2
and so on..)
I was looking for a specific function in R but I didn't found it...
thank you

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