How to create sequence of constant time interval
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] "2009-01-01 00:30:00 GMT" [1] "2009-01-01 01:00:00 GMT" [1] "2009-01-01 01:30:00 GMT" [1] "2009-01-01 02:00:00 GMT" [1] "2009-01-01 02:30:00 GMT" [1] "2009-01-01 03:00:00 GMT" [1] "2009-01-01 03:30:00 GMT" [1] "2009-01-01 04:00:00 GMT" [1] "2009-01-01 04:30:00 GMT" [1] "2009-01-01 05:00:00 GMT" [1] "2009-01-01 05:30:00 GMT" [1] "2009-01-01 06:00:00 GMT" [1] "2009-01-01 06:30:00 GMT" [1] "2009-01-01 07:00:00 GMT" [1] "2009-01-01 07:30:00 GMT" [1] "2009-01-01 08:00:00 GMT" [1] "2009-01-01 08:30:00 GMT" [1] "2009-01-01 09:00:00 GMT" [1] "2009-01-01 09:30:00 GMT" [1] "2009-01-01 10:00:00 GMT"
On 16 Feb, 10:00, Suresh_FSFM <suresh.ghals... at gmail.com> 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 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-increment value in a variable and changing the value of this variable, I would like to create new sequence with that time increment. How to use "seq()" correctly? 2) I have a date stored in one variable. Say "2009-01-01" How can I combine this date with each time interval in the first part? Will concatenate work? so at the end, I would like to have: 2009-01-01 00:00:00 2009-01-01 00:30:00 2009-01-01 01:00:00 2009-01-01 01:30:00 ... ... Thank you in advance. -- View this message in context:http://www.nabble.com/How-to-create-sequence-of-constant-time-interva... Sent from the R help mailing list archive at Nabble.com.
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