Maybe this will work for you?
julia> a = "foobarbaz"
"foobarbaz"
julia> b = SubString(a,3,6)
"obar"
julia> typeof(b)
SubString{ASCIIString}
julia> c = ASCIIString(b)
"obar"
julia> typeof(c)
ASCIIString
On Friday, December 4, 2015 at 2:48:12 PM UTC-8, Charles Santana wrote:
>
> Hi people,
>
> Maybe it is a trivial question for most of you, but I really could not
> find a way to solve my problem.
>
> I am using the function quandlget(id::ASCIIString) from the library
> https://github.com/milktrader/Quandl.jl (a great contribution, by the
> way!)
>
> Everything works fine when I use it in a straightforward way:
>
> julia> mydat = quandl("GOOG/NASDAQ_GOOG",rows=100,format="DataFrame")
> 100x6 DataFrames.DataFrame
> | Row | Date | Open | High | Low | Close | Volume |
> |-----|------------|--------|--------|--------|--------|-----------|
> | 1 | 2015-07-08 | 521.05 | 522.73 | 516.11 | 516.83 | 1.2967e6 |
> | 2 | 2015-07-09 | 523.12 | 523.77 | 520.35 | 520.68 | 1.84235e6 |
> | 3 | 2015-07-10 | 526.29 | 532.56 | 525.55 | 530.13 | 1.95668e6 |
>
>
> or when I do:
>
> julia> myid = "GOOG/NASDAQ_GOOG"
> "GOOG/NASDAQ_GOOG"
>
> julia> typeof(myid)
> ASCIIString
>
> julia> mydat = quandl(myid,rows=100,format="DataFrame")
> 100x6 DataFrames.DataFrame
> | Row | Date | Open | High | Low | Close | Volume |
> |-----|------------|--------|--------|--------|--------|-----------|
> | 1 | 2015-07-08 | 521.05 | 522.73 | 516.11 | 516.83 | 1.2967e6 |
> | 2 | 2015-07-09 | 523.12 | 523.77 | 520.35 | 520.68 | 1.84235e6 |
> | 3 | 2015-07-10 | 526.29 | 532.56 | 525.55 | 530.13 | 1.95668e6 |
>
>
> However, I get an error when I read my data from an external file. Assume
> I have an ascii file containing only one line:
>
> $ echo "GOOG/NASDAQ_GOOG" > portfolio.txt
>
> $ cat portfolio.txt
> GOOG/NASDAQ_GOOG
>
>
> I just read the content of this file by using readdlm and try to use it to
> call the same function quandl, but it does not work.
>
> julia> myportfolio = readdlm("./portfolio.txt",'\n')
> 1x1 Array{Any,2}:
> "GOOG/NASDAQ_GOOG"
>
> julia> typeof(myportfolio[1])
> SubString{ASCIIString}
>
> julia> mydat = quandl(myportfolio[1],rows=100,format="DataFrame")
> ERROR: MethodError: `quandlget` has no method matching
> quandlget(::SubString{ASCIIString})
>
>
> I suppose the easiest way to solve this problem is to convert my
> SubString{ASCIIString} variable to ASCIIString. Am I right here? How can I
> do it?
>
> Does any of you have another suggestion? May be I could read my data in a
> different way instead of using readdlm?
>
> Thanks for any tip!
>
> best,
>
> Charles
> --
> Um axé! :)
>
> --
> Charles Novaes de Santana, PhD
> http://www.imedea.uib-csic.es/~charles
>
