[R] Convert matrix to numeric

[Duncan Murdoch]

On 03/08/2011 3:04 PM, Jeffrey Joh wrote:
> I have a matrix that looks like this:
>
>
> structure(c("0.0376673981759913", "0.111066500741386", "1", "1103",
> "18", "OPEN", "DEPR", "0.0404073656092023", "0.115186044704599",
> "1", "719", "18", "OPEN", "DEPR", "0.0665342096693433", "0.197570061769498",
> "1", "1103", "18", "OPEN", "DEPR", "0.119287147905722", "0.356427096010845",
> "1", "1103", "18", "OPEN", "DEPR"), .Dim = c(7L, 4L), .Dimnames = list(
>      c("Sn", "SlnC", "housenum", "date", "hour", "flue", "pressurization"
>      ), c("10019.BLO", "1002.BLO", "10020.BLO", "10021.BLO")))
>
>
>
> How do I convert rows 1-5 to numeric?  I tried mode()<- "numeric" but that doesn't change anything.

Every entry in a matrix has the same type, so you can't change just 
those rows other than by extracting them into a separate matrix and 
changing that.

Duncan Murdoch

>
>
> I also tried converting this to a table then converting to numeric, but I got: (list) object cannot be coerced to type 'double'
>
>
>
> Jeff 		 	   		
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