Mode calculation fix and tests

Author: ginodeis

mode.go

@@ -25,6 +25,8 @@ func Mode(input Float64Data) (mode []float64, err error) {
 		case cnt > maxCnt:
 			mode = append(mode[:0], c[i-1])
 			maxCnt, cnt = cnt, 1
+		default:
+			cnt = 1
 		}
 	}
 	switch {

mode_test.go

@@ -16,6 +16,8 @@ func TestMode(t *testing.T) {
 		{[]float64{5, 5, 3, 3, 4, 2, 1}, []float64{3, 5}},
 		{[]float64{1}, []float64{1}},
 		{[]float64{-50, -46.325, -46.325, -.87, 1, 2.1122, 3.20, 5, 15, 15, 15.0001}, []float64{-46.325, 15}},
+		{[]float64{1, 2, 3, 4, 4, 4, 4, 4, 5, 3, 6, 7, 5, 0, 8, 8, 7, 6, 9, 9}, []float64{4}},
+		{[]float64{76, 76, 110, 76, 76, 76, 76, 119, 76, 76, 76, 76, 31, 31, 31, 31, 83, 83, 83, 78, 78, 78, 78, 78, 78, 78, 78}, []float64{76}},
 	} {
 		got, err := Mode(c.in)
 		if err != nil {