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Task/Benfords-law/Go/benfords-law.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+    "fmt"
+    "math"
+)
+
+func Fib1000() []float64 {
+    a, b, r := 0., 1., [1000]float64{}
+    for i := range r {
+        r[i], a, b = b, b, b+a
+    }
+    return r[:]
+}
+
+func main() {
+    show(Fib1000(), "First 1000 Fibonacci numbers")
+}
+
+func show(c []float64, title string) {
+    var f [9]int
+    for _, v := range c {
+        f[fmt.Sprintf("%g", v)[0]-'1']++
+    }
+    fmt.Println(title)
+    fmt.Println("Digit  Observed  Predicted")
+    for i, n := range f {
+        fmt.Printf("  %d  %9.3f  %8.3f\n", i+1, float64(n)/float64(len(c)),
+            math.Log10(1+1/float64(i+1)))
+    }
+}