[R] changing "," to "." in data.frame

[Troels Ring]

Dear friends - I have a data.frame with "," instead of "." and found the 
discussion

http://r.789695.n4.nabble.com/How-to-replace-all-commas-with-semicolon-in-a-string-tt4721187.html#a4721192

so copying the code of Ulrik(I hope:-)) I tried

(making some data)

AX <- 
data.frame(a=chartr(".",",",rnorm(5)),b=chartr(".",",",rnorm(5)),c=rnorm(5)) 


library(plyr)

adply(AX, 2, function(x){
if(!is.numeric(x[[1]]){
gsub(",", ".", x[[1]])
}else{
x[[1]]
}
})

and got the unwelcome error

Error: unexpected '{' in:
"adply(AX, 2, function(x){
if(!is.numeric(x[[1]]){"

Here is:

 > sessionInfo()
R version 3.4.1 (2017-06-30)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

Matrix products: default

locale:
[1] LC_COLLATE=Danish_Denmark.1252  LC_CTYPE=Danish_Denmark.1252
[3] LC_MONETARY=Danish_Denmark.1252 LC_NUMERIC=C
[5] LC_TIME=Danish_Denmark.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods base

other attached packages:
[1] plyr_1.8.4      TinnRcom_1.0.20 formatR_1.5 svSocket_0.9-57

loaded via a namespace (and not attached):
[1] compiler_3.4.1 tools_3.4.1    svMisc_0.9-70  Rcpp_0.12.13 tcltk_3.4.1

All best wishes

Troels Ring, Aalborg, Denmark