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package vecf64
import "math"
// IncrAdd performs a̅ + b̅ and then adds it elementwise to the incr slice
func IncrAdd(a, b, incr []float64) {
b = b[:len(a)]
incr = incr[:len(a)]
for i, v := range a {
incr[i] += v + b[i]
}
}
// IncrSub performs a̅ = b̅ and then adds it elementwise to the incr slice
func IncrSub(a, b, incr []float64) {
b = b[:len(a)]
incr = incr[:len(a)]
for i, v := range a {
incr[i] += v - b[i]
}
}
// IncrMul performs a̅ × b̅ and then adds it elementwise to the incr slice
func IncrMul(a, b, incr []float64) {
b = b[:len(a)]
incr = incr[:len(a)]
for i, v := range a {
incr[i] += v * b[i]
}
}
func IncrDiv(a, b, incr []float64) {
b = b[:len(a)]
incr = incr[:len(a)]
for i, v := range a {
if b[i] == 0 {
incr[i] = math.Inf(0)
continue
}
incr[i] += v / b[i]
}
}
// IncrDiv performs a̅ ÷ b̅. a̅ will be clobbered
func IncrPow(a, b, incr []float64) {
b = b[:len(a)]
incr = incr[:len(a)]
for i, v := range a {
switch b[i] {
case 0:
incr[i]++
case 1:
incr[i] += v
case 2:
incr[i] += v * v
case 3:
incr[i] += v * v * v
default:
incr[i] += math.Pow(v, b[i])
}
}
}
// IncrMod performs a̅ % b̅ then adds it to incr
func IncrMod(a, b, incr []float64) {
b = b[:len(a)]
incr = incr[:len(a)]
for i, v := range a {
incr[i] += math.Mod(v, b[i])
}
}
// Scale multiplies all values in the slice by the scalar and then increments the incr slice
// incr += a̅ * s
func IncrScale(a []float64, s float64, incr []float64) {
incr = incr[:len(a)]
for i, v := range a {
incr[i] += v * s
}
}
// IncrScaleInv divides all values in the slice by the scalar and then increments the incr slice
// incr += a̅ / s
func IncrScaleInv(a []float64, s float64, incr []float64) {
IncrScale(a, 1/s, incr)
}
/// IncrScaleInvR divides all numbers in the slice by a scalar and then increments the incr slice
// incr += s / a̅
func IncrScaleInvR(a []float64, s float64, incr []float64) {
incr = incr[:len(a)]
for i, v := range a {
incr[i] += s / v
}
}
// IncrTrans adds all the values in the slice by a scalar and then increments the incr slice
// incr += a̅ + s
func IncrTrans(a []float64, s float64, incr []float64) {
incr = incr[:len(a)]
for i, v := range a {
incr[i] += v + s
}
}
// IncrTransInv subtracts all the values in the slice by a scalar and then increments the incr slice
// incr += a̅ - s
func IncrTransInv(a []float64, s float64, incr []float64) {
IncrTrans(a, -s, incr)
}
// IncrTransInvR subtracts all the numbers in a slice from a scalar and then increments the incr slice
// incr += s - a̅
func IncrTransInvR(a []float64, s float64, incr []float64) {
incr = incr[:len(a)]
for i, v := range a {
incr[i] += s - v
}
}
// IncrPowOf performs elementwise power function and then increments the incr slice
// incr += a̅ ^ s
func IncrPowOf(a []float64, s float64, incr []float64) {
incr = incr[:len(a)]
for i, v := range a {
incr[i] += math.Pow(v, s)
}
}
// PowOfR performs elementwise power function below and then increments the incr slice.
// incr += s ^ a̅
func IncrPowOfR(a []float64, s float64, incr []float64) {
incr = incr[:len(a)]
for i, v := range a {
incr[i] += math.Pow(s, v)
}
}
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