[julia-users] Re: ERROR: no method getindex(Array{Any,1},ASCIIString)

[Michael Wojnowicz]

I am actually experiencing a similar problem on Julia Studio on my Mac OSX 
10.9.3.  The code below is a clip from an optimization algorithm I am 
writing.   If I have theta (which is a 4-element vector; it is called at 
the bottom) already set to some value, then copying and pasting the code 
below into Julia Studio DOES NOT update theta.  However, if I run this code 
line by line, it does update theta.



    ####### Load Data

    iris=readtable("iris.csv",header=true)

    xx=iris[:,2:5]

    yy=iris[:,6]



    ###### Extract Training Set

    x=xx[1:80,:]

    y=yy[1:80]

    y=pool(y) #make it a factor ("pooled data array)

    y=[int(y[i]==levels(y)[1]) for i=1:length(y)] #convert to numeric via 
"comprehension syntax"

    y=2y-1 #convert {0,1} to {-1,1}

    y=y*-1



    ####### Set Types

    x=matrix(x)

    y=float(y)


    ####START

    nsamples=size(x)[1];

    nfeatures=size(x)[2];

    theta=rep(0.1,nfeatures);