[julia-users] how to replace , to . in Array{Any,2}:

[paul analyst]

I have file with decimal separator lika ","
x=readdlm("x.txt",'\t')

julia> x=x[2:end,:]
6390x772 Array{Any,2}:

some kolumns looks :
julia> x[:,69]
6390-element Array{Any,1}:
 0.0
  "0,33"
  "0,72"
  "1,09"
  "0,95"
  "3,57"
  "2,27"
  "2,42"



julia> replace(x[:,69],',','.')
ERROR: `replace` has no method matching replace(::Array{Any,1}, ::Char, 
::Char)

julia> replace(string(x[:,69],',','.'))
ERROR: `replace` has no method matching replace(::ASCIIString)


how to replace , to . ?

I can repalce all , to . 

Paul