gnum

package
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 Go to latest Published: Sep 27, 2020 License: MIT Imports: 12 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	Billion = 1000000000
	Million = 1000000
	Kilo    = 1000
)
View Source 
const (
	GoldenRatio = 0.618
)

Variables

View Source 
var (
	PosInf = math.Inf(1)
	NegInf = math.Inf(-1)
)

Functions

func AddSS 

func AddSS(inReal0, inReal1 []float64) []float64

func AddSV 

func AddSV(inReal []float64, v float64) []float64

func Avg 

func Avg(inReal []float64, timePeriod int) []float64

Avg - Vector average

func BaseConvert 

func BaseConvert(num string, fromBase, toBase int) (string, error)

func BigIntToFloat64 

func BigIntToFloat64(it *big.Int) float64

func BiggerEqualThan 

func BiggerEqualThan(left, right *big.Int) bool

func BiggerThan 

func BiggerThan(left, right *big.Int) bool

func BoundUint32 

func BoundUint32(min, toBound, max uint32) uint32

给toBound划界，不超过[min, max]的范围

func CmpInt64Array 

func CmpInt64Array(a, b []int64) bool

func ContainsInt 

func ContainsInt(src []int, toFind int) bool

func DetectMaxPrec 

func DetectMaxPrec(vals []ElegantFloat, humanReadPrec int) int

func DetectMaxPrecRaw 

func DetectMaxPrecRaw(vals []float64, humanReadPrec int) int

func DetectPrecByHumanReadPrec 

func DetectPrecByHumanReadPrec(val float64, humanReadPrec int) int

func ElegantFloatArrayToFloatArray 

func ElegantFloatArrayToFloatArray(in []ElegantFloat) []float64

func Fibonacci 

func Fibonacci(n int) int

func Float64ToByte 

func Float64ToByte(f float64) []byte

Converts the float64 into an uint64 without changing the bits, it's the way the bits are interpreted that change. big endian references: https://stackoverflow.com/questions/37758267/golang-float64bits https://stackoverflow.com/questions/43693360/convert-float64-to-byte-array

func Float64ToByteLE 

func Float64ToByteLE(f float64) []byte

little endian

func FloatAlmostEqual 

func FloatAlmostEqual(a, b float64) bool

func FloatsEqual 

func FloatsEqual(a, b []float64) bool

func FloatsPtrToFloats 

func FloatsPtrToFloats(in []*float64) []float64

func FloatsToFloatsPtr 

func FloatsToFloatsPtr(in []float64) []*float64

func Format 

func Format(num interface{}, base int) (string, error)

func FormatFloat64 

func FormatFloat64(f float64, prec int) string

func FormatInt 

func FormatInt(i int) string

func FormatInt64 

func FormatInt64(i int64) string

func FormatUint16 

func FormatUint16(u uint16) string

func FormatUint32 

func FormatUint32(u uint32) string

func FormatUint64 

func FormatUint64(u uint64) string

func FormatUint8 

func FormatUint8(u uint8) string

func GetLast1 

func GetLast1(v int) int

199012 -> 2

func GetLast2 

func GetLast2(v int) int

199012 -> 12

func IsDigit 

func IsDigit(s string) bool

123 00123 +123 -123 123.456 2.07539829195e-05

func IsEvenInt64 

func IsEvenInt64(n int64) bool

func IsEvenUint64 

func IsEvenUint64(n uint64) bool

func IsOddInt64 

func IsOddInt64(n int64) bool

func IsOddUint64 

func IsOddUint64(n uint64) bool

func IsZero 

func IsZero(val *big.Int) bool

func JoinFormatInt 

func JoinFormatInt(sep string, num ...int) string

func MaxFloat 

func MaxFloat(args ...float64) float64

func MaxFloat64 

func MaxFloat64(first float64, args ...float64) float64

func MaxInt 

func MaxInt(first int, args ...int) int

func MaxInt64 

func MaxInt64(first int64, args ...int64) int64

func MaxSS 

func MaxSS(inReal0, inReal1 []float64) []float64

func MaxSV 

func MaxSV(inReal []float64, inTimePeriod int) []float64

func MaxUint32 

func MaxUint32(first uint32, args ...uint32) uint32

func MaxUint64 

func MaxUint64(first uint64, args ...uint64) uint64

func Mean 

func Mean(values []float64) float64

Mean (均值)

func MinFloat 

func MinFloat(args ...float64) float64

func MinFloat64 

func MinFloat64(first float64, args ...float64) float64

func MinInt 

func MinInt(first int, args ...int) int

func MinInt64 

func MinInt64(first int64, args ...int64) int64

func MinSS 

func MinSS(inReal0, inReal1 []float64) []float64

func MinSV 

func MinSV(inReal []float64, inTimePeriod int) []float64

func MinUint32 

func MinUint32(first uint32, args ...uint32) uint32

func MinUint64 

func MinUint64(first uint64, args ...uint64) uint64

func MinUintArray 

func MinUintArray(args []uint) uint

func MulSS 

func MulSS(inReal0, inReal1 []float64) []float64

func MulSV 

func MulSV(inReal []float64, v float64) []float64

func ParseBigInt 

func ParseBigInt(num string, base int) (big.Int, error)

func ParseFloat64 

func ParseFloat64(s string) (float64, error)

func RealGoldenRatio 

func RealGoldenRatio() float64

func RemoveDuplicate 

func RemoveDuplicate(elements []int) []int

func RemoveLast1 

func RemoveLast1(v int) int

199012 -> 19901

func RemoveLast2 

func RemoveLast2(v int) int

199012 -> 1990

func RemoveUint 

func RemoveUint(src []uint, toRemove uint, removeCount int) []uint

func ReverseBigFloats 

func ReverseBigFloats(in []big.Float)

func ReverseBigInts 

func ReverseBigInts(in []big.Int)

func ReverseFloats 

func ReverseFloats(in []float64)

func ReverseInt64s 

func ReverseInt64s(in []int64)

func ReverseInts 

func ReverseInts(in []int)

func ReverseUints 

func ReverseUints(in []uint)

func SetHead0 

func SetHead0(inReal []float64, count int)

func Slice 

func Slice(v int64, begin, len int) (int64, error)

SliceBetweenEqual(19901201, 4, 2) -> 12 SliceBetweenEqual(-19901201, 4, 2) -> 12

func SmallerEqualThan 

func SmallerEqualThan(left, right *big.Int) bool

func SmallerThan 

func SmallerThan(left, right *big.Int) bool

func SortBigFloats 

func SortBigFloats(in []big.Float)

func SortBigInts 

func SortBigInts(in []big.Int)

func SortFloats 

func SortFloats(in []float64)

func SortInt64s 

func SortInt64s(in []int64)

func SortInts 

func SortInts(in []int)

func SortUints 

func SortUints(in []uint)

func Std 

func Std(values []float64, ddof int) float64

Standard Deviation (均方差) ddof: Delta Degrees of Freedom. The divisor used in calculations is N - ddof, where N represents the number of elements. By default ddof is zero.

func SubSS 

func SubSS(inReal0, inReal1 []float64) []float64

func SubSV 

func SubSV(inReal []float64, v float64) []float64

func Sum 

func Sum(values []float64) float64

Sum (和)

func SumFloat 

func SumFloat(args ...float64) float64

func ToString 

func ToString(x interface{}) string

Types

type ElegantFloat 

type ElegantFloat struct {
	// contains filtered or unexported fields
}

original -> prec: 2 -> humanReadPrec: 2 37 -> 37.00 -> 37.00 12237.89374 -> 12237.89 -> 12237.89 3.3483300000000003 -> 3.35 -> 3.35 0.00883300000000003 -> 0.01 -> 0.0088 0.000012800003 -> 0.00 -> 0.000013

func NewElegantFloat 

func NewElegantFloat(val float64, prec int) ElegantFloat

func NewElegantFloatArray 

func NewElegantFloatArray(vals []float64, prec int) []ElegantFloat

func NewElegantFloatPtrArray 

func NewElegantFloatPtrArray(vals []*float64, prec int) []*ElegantFloat

func NewElegantFloatPtrArray2 

func NewElegantFloatPtrArray2(vals []float64, prec int) []*ElegantFloat

func NewElegantFloatPtrArray3 

func NewElegantFloatPtrArray3(vals []float64, prec int, nilVal float64) []*ElegantFloat

func (*ElegantFloat) JSON 

func (t *ElegantFloat) JSON(fmtNaNasNull bool) ([]byte, error)

What will happen if value is math.NaN? it will output bytes buffer `"NaN"`

func (ElegantFloat) MarshalJSON 

func (t ElegantFloat) MarshalJSON() ([]byte, error)

MarshalJSON will marshal using 2006-01-02T15:04:05+07:00 layout

FIXME if t.val = math.NaN and t.JSON(false), json.Marshal(t) will output error: json: error calling MarshalJSON for type *gnum.ElegantFloat: invalid character 'N' looking for beginning of value why and how to fix?

func (*ElegantFloat) Raw 

func (t *ElegantFloat) Raw() float64

func (*ElegantFloat) SetHumanReadPrec 

func (t *ElegantFloat) SetHumanReadPrec(humanReadPrec int)

func (*ElegantFloat) SetPrec 

func (t *ElegantFloat) SetPrec(prec int)

func (*ElegantFloat) String 

func (t *ElegantFloat) String() string

func (*ElegantFloat) UnmarshalJSON 

func (t *ElegantFloat) UnmarshalJSON(b []byte) error

TODO: NaN +-Inf会被ParseFloat64认为是错误吗，需要测试一下 UnmarshalJSON will unmarshal using 2006-01-02T15:04:05+07:00 layout

Source Files

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