Carp/test/statistics.carp

(load "Test.carp")
(load "Statistics.carp")

(use-all Double Test Statistics)

(defn all-eq [a b]
  (if (Int./= (Array.count a) (Array.count b))
    false
    (let [res true]
      (do
        (for [i 0 (Array.count a)]
          (if (not (Double.= @(Array.nth a i) @(Array.nth b i)))
            (set! res false)
            ()))
        res))))

(defn all-approx [a b]
  (if (Int./= (Array.count a) (Array.count b))
    false
    (let [res true]
      (do
        (for [i 0 (Array.count a)]
          (if (not (Double.approx @(Array.nth a i) @(Array.nth b i)))
            (set! res false)
            ()))
        res))))

(defn main []
  (with-test test
    (assert-equal test
                  2.0
                  (median &[1.0 2.0 3.0])
                  "median works as expected")
    (assert-equal test
                  2.5
                  (mean &[1.0 2.0 4.5])
                  "mean works as expected")
    (assert-equal test
                  2.0
                  (low-median &[1.0 2.0 4.0 5.0])
                  "low-median works as expected")
    (assert-equal test
                  4.0
                  (high-median &[1.0 2.0 4.0 5.0])
                  "high-median works as expected")
    (assert-equal test
                  3.0
                  (grouped-median &[1.0 2.0 4.0 5.0] 2)
                  "grouped-median works as expected I")
    (assert-equal test
                  2.5
                  (grouped-median &[1.0 2.0 4.0 5.0] 3)
                  "grouped-median works as expected II")
    (assert-equal test
                  1.0
                  (variance &[1.0 2.0 4.0 5.0])
                  "variance works as expected")
    (assert-equal test
                  0.75
                  (pvariance &[1.0 2.0 4.0 5.0])
                  "pvariance works as expected")
    (assert-equal test
                  2.0
                  (stdev &[1.0 1.0 9.0 9.0])
                  "stdev works as expected")
    (assert-equal test
                  2.0
                  (pstdev &[1.0 9.0])
                  "pstdev works as expected")
    (assert-op test
               &[0.0 0.0 0.0 0.0 8.0]
               &(winsorize &[0.0 0.0 0.0 0.0 10.0] 5.0)
               "winsorizing works as expected"
               all-approx)
    (assert-op test
               &[2.5 5.0 7.5]
               &(quartiles &[0.0 2.5 5.0 7.5 10.0])
               "quartiles work as expected"
               all-eq)
    (assert-equal test
                  5.0
                  (iqr &[0.0 2.5 5.0 7.5 10.0])
                  "iqr works as expected")
    (assert-equal test
                  10.0
                  (sum &[2.5 5.0 2.0 0.5])
                  "sum works as expected")
    (assert-equal test
                  40.0
                  (stdev-pct &[1.0 1.0 9.0 9.0])
                  "stdev-pct works as expected")
    (assert-op test
               3.7065
               (median-abs-dev &[5.0 10.0])
               "median-abs-dev works as expected"
               Double.approx)
    (assert-op test
               49.42
               (median-abs-dev-pct &[5.0 10.0])
               "median-abs-dev-pct works as expected"
               Double.approx)
    (assert-equal test
                  2.0
                  @(Summary.median &(summary &[1.0 2.0 3.0]))
                  "summary works as expected")
    (print-test-results test)))