RC4 encryption matlab code conversion not working

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MatLab

I have been trying to implement RC4 encryptionhttp://en.wikipedia.org/wiki/RC4[^] in Matlab but due to unknown reason the following code is not giving the right output. Please give me suggestion on improving this Matlab code:

function ef = rc4full(pf,ki)
    s = rc4key(ki);
    disp(s);
    s = uint8(s);
    j0 = 0;
    i0 = 0;
    r = prga(s, pf);
    disp(r);
    v = uint8(pf);
    C = bitxor(v,r);
    disp(C);
    data_show =dec2hex(C);
    ef = data_show;
function sc=rc4key(key)
for i0 = 0:255
    sc(i0+1) = i0+1;   
end
    j0 = 0;
for i0 = 0:255
    j0 = mod(j0 + sc(i0+1) + key(mod(i0, length(key)) + 1), 256);
    tmp = sc(i0+1);
    sc(i0+1) = sc(j0+1);
    sc(j0+1) = tmp;
end
function r = prga(sc, data)
    i0=0; j0=0; x=[]; t=[];
for x=0:length(data)-1
    i0 = mod( (i0+1), 256);
    j0 = mod( j0 + sc(i0+1), 256);
    tmp = sc(i0+1);
    sc(i0+1) = sc(j0+1);
    sc(j0+1) = tmp;
    r(x+1) = sc(mod( sc(i0+1) + sc(j0+1), 256)+1);
end

what I am expecting: Suppose I tried 'Hello' as data and 'Hi' as key. then in online it shows this: c9 9f 8d 97 91 but I am getting: af fe 50 1e ff.