Re: [R] How to create sequence of constant time interval

2009-02-18 Thread Gabor Grothendieck
For version 2.3-30 of chron which just appeared on CRAN this can be simplified to: library(chron) tt <- times(0:47/48) tt chron("1/1/09", tt) # no rep needed On Mon, Feb 16, 2009 at 6:04 AM, Gabor Grothendieck wrote: > Try this (and see R News 4/1 for more). > >> library(chron) >> tt <- times(0:

Re: [R] How to create sequence of constant time interval

2009-02-16 Thread Tony Breyal
ahh, didn't see Gabor's solution, that works much better :-) On 16 Feb, 10:00, Suresh_FSFM wrote: > Dear R-Experts, > > seek your help. > > There are two parts I want to deal with. > 1) > I want to create a time interval of say, 30 minutes starting from "00:00:00" > hrs > Thus at the end, I want

Re: [R] How to create sequence of constant time interval

2009-02-16 Thread Tony Breyal
Something like the following might give a few ideas: > start.date <- '2009-01-01' > start.time <- '00:00:00' > interval <- 30 > > increment.mins <- interval * 60 > x <- paste(start.date, start.time) > > for(i in 1:20) { + print(strptime(x, "%Y-%m-%d %H:%M:%S") + i*increment.mins) + } [1] "2009-

Re: [R] How to create sequence of constant time interval

2009-02-16 Thread Suresh_FSFM
Thank you very much for the precise response. Regards, Suresh Suresh_FSFM wrote: > > Dear R-Experts, > > seek your help. > > There are two parts I want to deal with. > 1) > I want to create a time interval of say, 30 minutes starting from > "00:00:00" hrs > Thus at the end, I want to crea

Re: [R] How to create sequence of constant time interval

2009-02-16 Thread Gabor Grothendieck
Try this (and see R News 4/1 for more). > library(chron) > tt <- times(0:47/48) > tt [1] 00:00:00 00:30:00 01:00:00 01:30:00 02:00:00 02:30:00 03:00:00 03:30:00 04:00:00 04:30:00 05:00:00 05:30:00 06:00:00 06:30:00 07:00:00 07:30:00 [17] 08:00:00 08:30:00 09:00:00 09:30:00 10:00:00 10:30:00 11:00

[R] How to create sequence of constant time interval

2009-02-16 Thread Suresh_FSFM
Dear R-Experts, seek your help. There are two parts I want to deal with. 1) I want to create a time interval of say, 30 minutes starting from "00:00:00" hrs Thus at the end, I want to create sequence: 00:00:00 00:30:00 01:00:00 01:30:00 .. .. How to do so ? Later, I want to change the time-in