67 lines
1.3 KiB
Go
67 lines
1.3 KiB
Go
|
// Copyright © 2016 Abcum Ltd
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package math
|
||
|
|
|
||
|
|
import "sort"
|
||
|
|
|
||
|
|
func Mode(vals []float64) []float64 {
|
||
|
|
|
||
|
|
var out []float64
|
||
|
|
|
||
|
|
switch len(vals) {
|
||
|
|
case 1:
|
||
|
|
return vals
|
||
|
|
case 0:
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
if !sort.Float64sAreSorted(vals) {
|
||
|
|
vals = Sort(vals)
|
||
|
|
}
|
||
|
|
|
||
|
|
out = make([]float64, 5)
|
||
|
|
|
||
|
|
cnt, max := 1, 1
|
||
|
|
|
||
|
|
for i := 1; i < len(vals); i++ {
|
||
|
|
switch {
|
||
|
|
case vals[i] == vals[i-1]:
|
||
|
|
cnt++
|
||
|
|
case cnt == max && max != 1:
|
||
|
|
out = append(out, vals[i-1])
|
||
|
|
cnt = 1
|
||
|
|
case cnt > max:
|
||
|
|
out = append(out[:0], vals[i-1])
|
||
|
|
max, cnt = cnt, 1
|
||
|
|
default:
|
||
|
|
cnt = 1
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch {
|
||
|
|
case cnt == max:
|
||
|
|
out = append(out, vals[len(vals)-1])
|
||
|
|
case cnt > max:
|
||
|
|
out = append(out[:0], vals[len(vals)-1])
|
||
|
|
max = cnt
|
||
|
|
}
|
||
|
|
|
||
|
|
if max == 1 {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
return out
|
||
|
|
}
|