dt

package module
v0.1.5 Latest Latest
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 Go to latest Published: May 21, 2020 License: MIT Imports: 7 Imported by: 2

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func IsNA 

func IsNA(a Value) bool

IsNA checks if a is NA.

Types

type Frame 

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

Frame is the frame data structure.

func NewFrame 

func NewFrame(keys ...string) *Frame

NewFrame creates a new frame.

func (*Frame) Add 

func (a *Frame) Add(key string, list List) *Frame

Add adds the list with key.

func (*Frame) Append 

func (a *Frame) Append(rs ...Record) *Frame

Append appends x to frames a.

func (*Frame) Check added in v0.1.1 

func (a *Frame) Check(keys ...string) error

Check checks if the frame has the keys.

func (*Frame) Concat 

func (a *Frame) Concat(b *Frame) *Frame

Concat concats frame a with b.

func (*Frame) Copy 

func (a *Frame) Copy(deep bool) *Frame

Copy makes a copy of frame a.

func (*Frame) Del 

func (a *Frame) Del(keys ...string) *Frame

Del deletes the list by keys.

func (*Frame) DropNA 

func (a *Frame) DropNA(keys ...string) *Frame

DropNA drops NA value.

func (*Frame) Empty 

func (a *Frame) Empty() *Frame

Empty returns a empty frame like frame a.

func (*Frame) FillNA 

func (a *Frame) FillNA(value Value, keys ...string) *Frame

FillNA fills NA value with v.

func (*Frame) Filter 

func (a *Frame) Filter(f func(Record) bool) *Frame

Filter filters the frame with function f.

func (*Frame) Get 

func (a *Frame) Get(key string) List

Get gets the list by key.

func (*Frame) GroupBy 

func (a *Frame) GroupBy(key string, keys ...string) *Group

GroupBy groups records by keys.

func (*Frame) Has 

func (a *Frame) Has(keys ...string) bool

Has checks if the frame has the keys.

func (*Frame) Iter 

func (a *Frame) Iter() *Iter

Iter returns a iter of frame a.

func (*Frame) Join 

func (a *Frame) Join(b *Frame, key string, keys ...string) *Join

Join joins frame a and b.

func (*Frame) Keys 

func (a *Frame) Keys() []string

Keys returns the keys of frame a.

func (*Frame) Len 

func (a *Frame) Len() int

Len returns the length of frame a.

func (*Frame) Lists 

func (a *Frame) Lists() []List

Lists returns the lists of frame a.

func (*Frame) Map 

func (a *Frame) Map(f func(Record) Value) List

Map maps frame a to list by function f.

func (*Frame) MapTo 

func (a *Frame) MapTo(key string, f func(Record) Value) *Frame

MapTo maps frame a to the key list.

func (*Frame) Pick 

func (a *Frame) Pick(key string, keys ...string) *Frame

Pick picks some lists and returns a new frame,

func (*Frame) Rename 

func (a *Frame) Rename(old, new string) *Frame

Rename renames the key.

func (*Frame) Set 

func (a *Frame) Set(key string, list List) *Frame

Set sets the list by key.

func (*Frame) Slice 

func (a *Frame) Slice(i, j int) *Frame

Slice gets the slice of frame a.

func (*Frame) Sort 

func (a *Frame) Sort(f func(Record, Record) bool) *Frame

Sort sorts frame a by function f.

func (*Frame) String 

func (a *Frame) String() string

String shows frame a as string.

type Group 

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

Group is a group data structure.

func (*Group) Apply 

func (a *Group) Apply(key string, name string, f func(List) Value) *Group

Apply applies the aggregate function to group a.

func (*Group) Do 

func (a *Group) Do() *Frame

Do does the group.

type Iter 

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

Iter is a iter of frame.

func (*Iter) Next 

func (a *Iter) Next() bool

Next check if has next record.

func (*Iter) Record 

func (a *Iter) Record() Record

Record returns the current record.

type Join 

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

Join is the join option.

func (*Join) Do 

func (a *Join) Do(prefix string) *Frame

Do does the join operation.

func (*Join) On 

func (a *Join) On(key string, keys ...string) *Join

On sets the left keys.

type List 

type List []Value

List is the list data structure.

func (List) FillNA 

func (a List) FillNA(value Value) List

FillNA fills NA value with value.

func (List) Filter 

func (a List) Filter(f func(Value) bool) List

Filter filters the list with function f.

func (List) Map 

func (a List) Map(f func(Value) Value) List

Map maps the list by function f.

func (List) Number 

func (a List) Number() List

Number converts the list to float list.

func (List) String 

func (a List) String() List

String converts the list to string list.

type Number 

type Number float64

Number is a float64 value.

func (Number) Number 

func (a Number) Number() float64

Number returns as a number value.

func (Number) String 

func (a Number) String() string

String returns as a string value.

type Record 

type Record interface {
	Value(key string) Value
	Number(key string) float64
	String(key string) string
}

Record is the record interface.

type String 

type String string

String is a string value.

func (String) Number 

func (a String) Number() float64

Number returns as a number value.

func (String) String 

func (a String) String() string

String returns as a string value.

type Value 

type Value interface {
	Number() float64
	String() string
}

Value is the value interface.

func Count 

func Count(l List) Value

Count returns the count of list l.

func First 

func First(l List) Value

First returns the first of list l.

func Last 

func Last(l List) Value

Last returns the last of list l.

func Max 

func Max(l List) Value

Max returns the max of list l.

func Mean 

func Mean(l List) Value

Mean returns the mean of list l.

func Min 

func Min(l List) Value

Min returns the min of list l.

func Std 

func Std(l List) Value

Std returns the std of list l.

func Sum 

func Sum(l List) Value

Sum returns the sum of list l.

func Var 

func Var(l List) Value

Var returns the var of list l.

Source Files

View all Source files

Directories

Path Synopsis
io
csv
xlsx

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