/
statistics.go
51 lines (42 loc) · 1.3 KB
/
statistics.go
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// Copyright 2017 Xiaomi, Inc.
//
// 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 utils
import "math"
func ComputeMean(values []float64) float64 {
var sum float64
for _, value := range values {
sum = sum + value
}
return (sum / float64(len(values)))
}
func ComputeStdDeviation(values []float64) float64 {
var (
mean float64
vp []float64
stdDiv, temp float64
)
vp = make([]float64, len(values))
/*Calculate mean of the data points*/
mean = ComputeMean(values)
/*Calculate standard deviation of individual data points*/
for i, v := range values {
temp = v - mean
vp[i] = (temp * temp)
}
/* Finally, Compute standard Deviation of data points
* by taking mean of individual std. Deviation.
*/
stdDiv = ComputeMean(vp)
return float64(math.Sqrt(float64(stdDiv)))
}