[R] Change date time to epoch time

[David Winsemius]

On Nov 16, 2013, at 8:46 PM, vivek kumar singh wrote:

> Hi All,
>
> I have time series data in (Year-month-date-hour-minute-second) format
> and i want to convert it to epoch time.
>
> I have tried the following:
> *> Sys.time()**
> **[1] "2013-11-17 10:39:46 MYT"**
> **> as.numeric(Sys.time())**
> **[1] 1384656006**

Should we assume this is "epoch time"?

> **> as.numeric("2013-11-17 10:39:46 MYT")**
> **[1] NA**
> **Warning message:**
> **NAs introduced by coercion **
> **> as.numeric("2013-11-17 10:39:46 MYT")**
> **[1] NA**

If it is then this is close:

as.numeric(as.POSIXct("2013-11-17 10:39:46 MYT"))

(You may need to supply an appropriate TZ offset in seconds

?POSIXct


--  
David.

> **Warning message:**
> **NAs introduced by coercion **
> *
> Please let me know which function in R converts date-time to epoch  
> time.
>
> Regards,
> Vivek
>
> 	[[alternative HTML version deleted]]
>
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David Winsemius, MD
Alameda, CA, USA