[R] converting character matrix to POSIXct matrix

[Rui Barradas]

Hello,

Use sapply instead.


Hope this helps,

Rui Barradas

Em 26-04-2013 18:51, hh wt escreveu:
> I thought this is a common question but rseek/google searches don't yield
> any relevant hit.
>
> I have a matrix of character strings, which are time stamps,
>
>> time.m[1:5,1:5]
>       [,1]           [,2]           [,3]           [,4]           [,5]
>
> [1,] "08:00:20.799" "08:00:20.799" "08:00:20.799" "08:00:20.799"
> "08:00:20.799"
> [2,] "08:00:21.996" "08:00:22.071" "08:00:23.821" "08:00:24.370"
> "08:00:25.573"
> [3,] "08:00:29.200" "08:00:29.200" "08:00:29.591" "08:00:30.368"
> "08:00:30.536"
> [4,] "08:00:31.073" "08:00:31.372" "08:00:31.384" "08:00:31.403"
> "08:00:31.867"
> [5,] "08:00:31.867" "08:00:31.867" "08:00:31.971" "08:00:34.571"
> "08:00:34.571"
>
> And i would like to convert it to a POSIXct matrix. I tried this,
>
> time1 = lapply(time.m, function(tt)strptime(tt, "%H:%M:%OS"))
>
> but it yields a list.
>
> Any tip is appreciated.
>
>
> Horace
>
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>
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