# [R] Problem with converting factors to numbers

Petr PIKAL petr.pikal at precheza.cz
Tue Sep 20 10:22:42 CEST 2011

```Hi
>
> [R] Problem with converting factors to numbers
>
> Hi all,
> I have a very simple problem, but i cant find a solution probably
because i
> search for the wrong keywords.
>
> I have coordinates x and y. They look like this:
>
> > str(data)
> 'data.frame':   13979 obs. of  2 variables:
>  \$ x               : Factor w/ 3815 levels "","186011.4971280",..: 1528
1524
> 1524 1524 1524 ...
>  \$ y               : Factor w/ 3792 levels "","449372.9599780",..: 1333
1116
> 1116 1116 1116 ...
>
>
> > data\$x[1:10]
>  [1] 186843.8131840 186842.6156650 186842.6156650 186842.6156650
> 186842.6156650 186842.6156650 186842.6156650 186842.6156650
>  [9] 186842.6156650 186842.6156650
> 3815 Levels:  186011.4971280 186021.0356270 186048.6246680
186051.3570180
> 186052.7204140 186052.9162970 ... 188132.9056840
>
>
> I want them in *numbers*, so i run:
> data\$x2 <- as.numeric(data\$x)
>
> But what it did is this:
> > data\$x2[1:10]
>  [1] 1528 1524 1524 1524 1524 1524 1524 1524 1524 1524
>
> I tried converting it via character and then to numeric, but also that
didnt
> work.

It shall work. However nobody knows how did you apply converting via
character and numeric until you post the code you actually used.

>From str it seems to me that either your data are from beginning non
numeric or you have some non numeric characters in your input data.

Regards
Petr

>
> Anyone ideas?
>
>
>
>
>
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Problem-with-
> converting-factors-to-numbers-tp3826061p3826061.html
> Sent from the R help mailing list archive at Nabble.com.
>
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> and provide commented, minimal, self-contained, reproducible code.

```