[R] grid: dividing units by numbers

[Deepayan Sarkar]

On Wednesday 29 October 2003 09:36, Wolfram Fischer wrote:
> How can I divide a unit by an number
> or average a vector of units, e.g.:
>
> 	u1 <- unit( 3, 'npc' )
> 	u2 <- unit( 6, 'npc' )
>
> 	u1 / 2

0.5 * u1

> 	( u1 + u2 ) / 2

0.5 * (u1 + u2)

> 	mean( unit.c(u1,u2) )

Not sure if that's generally doable (other than adding all the units one at a 
time in a loop and then multiplying by 1/length).

But if all your units are going to be "npc", you might as well keep the 'x'-s 
separate and do arithmetic on them.

HTH,

Deepayan

> I would use that e.g. to to calculate the coordinates
> of the midpoint of a line.
>
> Wolfram
>
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