func frequencyTest(gen *Generator, d, iters int) (float64, float64) {
bins := make([]int, d)
for n := 0; n < iters; n++ {
bins[gen.UniformInt(0, d-1)]++
}
probs := make([]float64, d)
for i, _ := range probs {
probs[i] = 1 / float64(d)
}
chiSqr, prob := stats.ChiSqr(bins, probs)
return chiSqr, prob
}
func serialTest(gen *Generator, d, iters int) (float64, float64) {
bins := make([]int, d*d)
for n := 0; n < iters; n++ {
x, y := gen.UniformInt(0, d-1), gen.UniformInt(0, d-1)
bins[y*d+x]++
}
probs := make([]float64, d*d)
for i, _ := range probs {
probs[i] = 1 / float64(d*d)
}
chi, prob := stats.ChiSqr(bins, probs)
return chi, prob
}