Looping in Julia

[Eric.O]

@SteffenPL

function distance(xs, ys, a, b) 
    n = length(xs)
    m = length(a)
    r = zeros(n, m)  # create the matrix and fill it with zeros
    for j in 1:m
        for i in 1:n
            if sqrt( (xs[i]-a[j])^2 + (ys[i]-b[j])^2 ) < 2 
                r[i,j] = 1
                @show i j r      # display the matrix in each iteration
            end
         end
    end
    return r
end

When I run this code I get the error “distance (generic function with 2 methods)”

How do I make this work, please?