Simple pagerank in Julia

pagerank.jl

# Simple pagerank implementation
# M - transition matrix
# r - initial rankings
# \beta - the taxation cost, (1-\beta) is the teleport prob
# iter - iterations to run for
function pagerank(M::Matrix{Float64}, r::Vector{Float64}, β::Float64, iter::Int64)
    c = (1-β)/length(r)
    v_prime = β*M*r + c
    for i = 1:iter
        v_prime = β*M*v_prime + c
    end
    return v_prime
end