Hi,
What's the best way to average dates?
I though mean.POISXct would work fine but...
a
[1] 2007-04-02 19:22:00 WEST
b
[1] 2007-03-17 16:23:00 WET
class(a)
[1] POSIXt POSIXct
class(b)
[1] POSIXt POSIXct
mean(a,b)
[1] 2007-04-02 19:22:00 WEST
mean(b,a)
[1] 2007-03-17 16:23:00 WET
?!
On Wed, 20 Jun 2007, Sérgio Nunes wrote:
Hi,
What's the best way to average dates?
I though mean.POISXct would work fine but...
a
[1] 2007-04-02 19:22:00 WEST
b
[1] 2007-03-17 16:23:00 WET
class(a)
[1] POSIXt POSIXct
class(b)
[1] POSIXt POSIXct
mean(a,b)
[1] 2007-04-02
You need to call 'mean.POSIXct' with a single vector:
a
[1] 2007-01-01 12:00:00 GMT
b
[1] 2007-07-01 14:22:00 GMT
mean(c(a,b))
[1] 2007-04-02 01:11:00 GMT
On 6/20/07, Sérgio Nunes [EMAIL PROTECTED] wrote:
Hi,
What's the best way to average dates?
I though mean.POISXct would work fine