18 lines
455 B
Go
18 lines
455 B
Go
package stats
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import "math"
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// Sigmoid returns the input values in the range of -1 to 1
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// along the sigmoid or s-shaped curve, commonly used in
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// machine learning while training neural networks as an
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// activation function.
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func Sigmoid(input Float64Data) ([]float64, error) {
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if input.Len() == 0 {
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return Float64Data{}, EmptyInput
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}
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s := make([]float64, len(input))
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for i, v := range input {
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s[i] = 1 / (1 + math.Exp(-v))
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}
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return s, nil
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}
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