Hello,

I have some question on chron

I currently doing this

t1 <- chron(,"11:30:00")
t2 <- chron(,"11:45:00")
tt <- seq(t1,t2,by=times("00:00:01"))

tt has 901 values (15 minutes * 60 secs) and then

x1 <- rnorm(1:901)
x2 <- rnorm(1:901)
x3 <- rnorm(1:901)


df <-  data.frame(tt, x1, x2, x3)

I would like to write a function such that I can divide df vector into any
interval,
For e.g 10 secs, 5 secs, 15 secs etc..

How can I achieve this. Is there a way to subtract seconds on a chron object
For e.g.

#This should subtract 20 seconds, but doesn't work, looks like it is
subtracting days
newtime <- df$tt - 20

Please help.

Rusty

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