scale for the y-axis

hi there
I hope you can help me
I'm doing a boxplot and I'm trying to change the y-axis from seconds to
minutes
I do this:
boxplot ( time~movement*scene, ylab = "Time (seconds)", xlab = "Condition")

but seconds goes from 0 to 900 and I'm looking to change it into minutes

Divide it by 60?

  tminutes<-time/60
  boxplot ( tminutes~movement*scene, ylab = "Time (minutes)", xlab =
	"Condition")
or just
   boxplot ( I(time/60)~movement*scene, ylab = "Time (minutes)", xlab =
	"Condition")


	-thomas

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