38 lines
864 B
Go
38 lines
864 B
Go
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// Copyright © 2016 Abcum 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 "math/rand"
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func Sample(vals []float64, take int) []float64 {
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var out []float64
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if len(vals) == 0 {
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return nil
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}
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for k, v := range rand.Perm(len(vals)) {
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if k < take {
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out = append(out, vals[v])
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continue
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}
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break
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}
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return out
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}
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