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