[R] Convert Time Variable to Numeric

[Don MacQueen]

Perhaps something like:

>  as.numeric(chron(times.=c('01:23:21','11:12:13')))
[1] 0.05788194 0.46681713

-Don

At 7:02 AM -0800 11/24/09, RanjanV wrote:
>Hello Everyone
>
>I am new to R
>
>I would like to know how to deal with Time Variable. If I have a column of
>containing Time data in the format of hh:mm:ss such as 00:56:45, 01:24:36,
>01:41:25, and so on......
>
>I could find averages for this column using the Chron package. But now I
>need to plot a graph so I need to convert this Time variable to numeric.
>
>My data is as follows:
>Activity               Time Required
>A                        00:56:45
>B                        01:24:36
>C                        01:41:25
>D                        01:48:25
>E                        01:51:25
>F                        01:55:25
>G                        01:59:25
>and so on..............
>
>total rows in my data are 150
>Can someone guide me regarding converting this Time variable to numeric?
>
>Thank you
>RanjanV
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-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062