[R] problem with sub()

[Rui Barradas]

Hello,

Works with me.


x <- c("21000 km", "119000 km", "36600 km", "92000 km", "140200 km", 
"90000 km")
sub("[[:blank:]]*km", "", x)
as.numeric(sub("km", "", x)) # for numeric, don't worry with blanks

Hope this helps,

Rui Barradas

Em 10-06-2012 19:44, t_o_b_y escreveu:
> Dear R users:
>
>
>
> I want to convert some character vectors into numeric vectors.
>
>> head(price)
> [1] "15450 EUR" "7900 EUR"  "13800 EUR" "3990 EUR"  "4500 EUR"
> [6] "4250 EUR"
>
>> head(mileage)
> [1] "21000 km"  "119000 km" "36600 km"  "92000 km"  "140200 km"
> [6] "90000 km"
>
> in the first example I can use:
>
> price <- sub(" EUR",  "",  price)
>
> to get
>
> "15450" "7900"  "13800" "3990"  "4500"  "4250"
>
> but in the second example it doesn't work with
>
> mileage <- sub(" km, "", mileage)
>
>
> I found a solution online:
>   sub("[[:blank:]]+$", "", x)
>
> so I can solve it with two steps (eliminate first "km" then blanks)
>
> but I'm wondering where the difference in my two examples is
> why does it work with the first vector and why not with the second
>
> --
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