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sequence => seq

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This commit is contained in:
Will Charczuk 2017-05-12 14:17:43 -07:00
parent 182c4eeed2
commit 9ca1b0466a
28 changed files with 205 additions and 141 deletions
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_examples/axes/output.png
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9
_examples/custom_padding/main.go
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@ -5,6 +5,7 @@ import (
"github.com/wcharczuk/go-chart"
"github.com/wcharczuk/go-chart/drawing"
"github.com/wcharczuk/go-chart/seq"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
@ -30,8 +31,8 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
},
Series: []chart.Series{
chart.ContinuousSeries{
XValues: chart.Sequence.Float64(1.0, 100.0),
YValues: chart.Sequence.Random(100.0, 256.0),
XValues: seq.Wrap(seq.NewLinear().WithStart(1.0).WithEnd(100.0)).Array(),
YValues: seq.Wrap(seq.NewRandom().WithLen(100).WithAverage(256)).Array(),
},
},
}
@ -57,8 +58,8 @@ func drawChartDefault(res http.ResponseWriter, req *http.Request) {
},
Series: []chart.Series{
chart.ContinuousSeries{
XValues: chart.Sequence.Float64(1.0, 100.0),
YValues: chart.Sequence.Random(100.0, 256.0),
XValues: seq.Wrap(seq.NewLinear().WithStart(1.0).WithEnd(100.0)).Array(),
YValues: seq.Wrap(seq.NewRandom().WithLen(100).WithAverage(256)).Array(),
},
},
}

16
bollinger_band_series.go
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@ -3,7 +3,7 @@ package chart
import (
"fmt"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
// BollingerBandsSeries draws bollinger bands for an inner series.
@ -17,7 +17,7 @@ type BollingerBandsSeries struct {
K float64
InnerSeries ValuesProvider
valueBuffer *sequence.Buffer
valueBuffer *seq.Buffer
}
// GetName returns the name of the time series.
@ -67,7 +67,7 @@ func (bbs *BollingerBandsSeries) GetBoundedValues(index int) (x, y1, y2 float64)
return
}
if bbs.valueBuffer == nil || index == 0 {
bbs.valueBuffer = sequence.NewBufferWithCapacity(bbs.GetPeriod())
bbs.valueBuffer = seq.NewBufferWithCapacity(bbs.GetPeriod())
}
if bbs.valueBuffer.Len() >= bbs.GetPeriod() {
bbs.valueBuffer.Dequeue()
@ -76,8 +76,8 @@ func (bbs *BollingerBandsSeries) GetBoundedValues(index int) (x, y1, y2 float64)
bbs.valueBuffer.Enqueue(py)
x = px
ay := sequence.Seq{Provider: bbs.valueBuffer}.Average()
std := sequence.Seq{Provider: bbs.valueBuffer}.StdDev()
ay := seq.New(bbs.valueBuffer).Average()
std := seq.New(bbs.valueBuffer).StdDev()
y1 = ay + (bbs.GetK() * std)
y2 = ay - (bbs.GetK() * std)
@ -96,15 +96,15 @@ func (bbs *BollingerBandsSeries) GetBoundedLastValues() (x, y1, y2 float64) {
startAt = 0
}
vb := sequence.NewBufferWithCapacity(period)
vb := seq.NewBufferWithCapacity(period)
for index := startAt; index < seriesLength; index++ {
xn, yn := bbs.InnerSeries.GetValues(index)
vb.Enqueue(yn)
x = xn
}
ay := sequence.Seq{Provider: vb}.Average()
std := sequence.Seq{Provider: vb}.StdDev()
ay := seq.Seq{Provider: vb}.Average()
std := seq.Seq{Provider: vb}.StdDev()
y1 = ay + (bbs.GetK() * std)
y2 = ay - (bbs.GetK() * std)

10
bollinger_band_series_test.go
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@ -6,15 +6,15 @@ import (
"testing"
"github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
func TestBollingerBandSeries(t *testing.T) {
assert := assert.New(t)
s1 := mockValuesProvider{
X: sequence.Values(1.0, 100.0),
Y: sequence.RandomValuesWithAverage(1024, 100),
X: seq.Range(1.0, 100.0),
Y: seq.RandomValuesWithAverage(1024, 100),
}
bbs := &BollingerBandsSeries{
@ -38,8 +38,8 @@ func TestBollingerBandLastValue(t *testing.T) {
assert := assert.New(t)
s1 := mockValuesProvider{
X: sequence.Values(1.0, 100.0),
Y: sequence.Values(1.0, 100.0),
X: seq.Range(1.0, 100.0),
Y: seq.Range(1.0, 100.0),
}
bbs := &BollingerBandsSeries{

20
chart_test.go
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@ -10,7 +10,7 @@ import (
"github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/drawing"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
func TestChartGetDPI(t *testing.T) {
@ -392,8 +392,8 @@ func TestChartRegressionBadRangesByUser(t *testing.T) {
},
Series: []Series{
ContinuousSeries{
XValues: sequence.Values(1.0, 10.0),
YValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
YValues: seq.Range(1.0, 10.0),
},
},
}
@ -408,8 +408,8 @@ func TestChartValidatesSeries(t *testing.T) {
c := Chart{
Series: []Series{
ContinuousSeries{
XValues: sequence.Values(1.0, 10.0),
YValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
YValues: seq.Range(1.0, 10.0),
},
},
}
@ -419,7 +419,7 @@ func TestChartValidatesSeries(t *testing.T) {
c = Chart{
Series: []Series{
ContinuousSeries{
XValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
},
},
}
@ -505,8 +505,8 @@ func TestChartE2ELine(t *testing.T) {
},
Series: []Series{
ContinuousSeries{
XValues: sequence.ValuesWithStep(0, 4, 1),
YValues: sequence.ValuesWithStep(0, 4, 1),
XValues: seq.RangeWithStep(0, 4, 1),
YValues: seq.RangeWithStep(0, 4, 1),
},
},
}
@ -550,8 +550,8 @@ func TestChartE2ELineWithFill(t *testing.T) {
StrokeColor: drawing.ColorBlue,
FillColor: drawing.ColorRed,
},
XValues: sequence.ValuesWithStep(0, 4, 1),
YValues: sequence.ValuesWithStep(0, 4, 1),
XValues: seq.RangeWithStep(0, 4, 1),
YValues: seq.RangeWithStep(0, 4, 1),
},
},
}

14
concat_series_test.go
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@ -4,25 +4,25 @@ import (
"testing"
assert "github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
func TestConcatSeries(t *testing.T) {
assert := assert.New(t)
s1 := ContinuousSeries{
XValues: sequence.Values(1.0, 10.0),
YValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
YValues: seq.Range(1.0, 10.0),
}
s2 := ContinuousSeries{
XValues: sequence.Values(11, 20.0),
YValues: sequence.Values(10.0, 1.0),
XValues: seq.Range(11, 20.0),
YValues: seq.Range(10.0, 1.0),
}
s3 := ContinuousSeries{
XValues: sequence.Values(21, 30.0),
YValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(21, 30.0),
YValues: seq.Range(1.0, 10.0),
}
cs := ConcatSeries([]Series{s1, s2, s3})

14
continuous_series_test.go
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@ -5,7 +5,7 @@ import (
"testing"
assert "github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
func TestContinuousSeries(t *testing.T) {
@ -13,8 +13,8 @@ func TestContinuousSeries(t *testing.T) {
cs := ContinuousSeries{
Name: "Test Series",
XValues: sequence.Values(1.0, 10.0),
YValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
YValues: seq.Range(1.0, 10.0),
}
assert.Equal("Test Series", cs.GetName())
@ -54,20 +54,20 @@ func TestContinuousSeriesValidate(t *testing.T) {
cs := ContinuousSeries{
Name: "Test Series",
XValues: sequence.Values(1.0, 10.0),
YValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
YValues: seq.Range(1.0, 10.0),
}
assert.Nil(cs.Validate())
cs = ContinuousSeries{
Name: "Test Series",
XValues: sequence.Values(1.0, 10.0),
XValues: seq.Range(1.0, 10.0),
}
assert.NotNil(cs.Validate())
cs = ContinuousSeries{
Name: "Test Series",
YValues: sequence.Values(1.0, 10.0),
YValues: seq.Range(1.0, 10.0),
}
assert.NotNil(cs.Validate())
}

4
ema_series_test.go
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@ -4,11 +4,11 @@ import (
"testing"
"github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
var (
emaXValues = sequence.Values(1.0, 50.0)
emaXValues = seq.Range(1.0, 50.0)
emaYValues = []float64{
1, 2, 3, 4, 5, 4, 3, 2,
1, 2, 3, 4, 5, 4, 3, 2,

6
histogram_series_test.go
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@ -4,7 +4,7 @@ import (
"testing"
assert "github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
func TestHistogramSeries(t *testing.T) {
@ -12,8 +12,8 @@ func TestHistogramSeries(t *testing.T) {
cs := ContinuousSeries{
Name: "Test Series",
XValues: sequence.Values(1.0, 20.0),
YValues: sequence.Values(10.0, -10.0),
XValues: seq.Range(1.0, 20.0),
YValues: seq.Range(10.0, -10.0),
}
hs := HistogramSeries{

8
linear_regression_series.go
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@ -3,7 +3,7 @@ package chart
import (
"fmt"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
util "github.com/wcharczuk/go-chart/util"
)
@ -107,14 +107,14 @@ func (lrs *LinearRegressionSeries) computeCoefficients() {
p := float64(endIndex - startIndex)
xvalues := sequence.NewBufferWithCapacity(lrs.Len())
xvalues := seq.NewBufferWithCapacity(lrs.Len())
for index := startIndex; index < endIndex; index++ {
x, _ := lrs.InnerSeries.GetValues(index)
xvalues.Enqueue(x)
}
lrs.avgx = sequence.Seq{Provider: xvalues}.Average()
lrs.stddevx = sequence.Seq{Provider: xvalues}.StdDev()
lrs.avgx = seq.Seq{Provider: xvalues}.Average()
lrs.stddevx = seq.Seq{Provider: xvalues}.StdDev()
var sumx, sumy, sumxx, sumxy float64
for index := startIndex; index < endIndex; index++ {

14
linear_regression_series_test.go
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@ -4,7 +4,7 @@ import (
"testing"
assert "github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
)
func TestLinearRegressionSeries(t *testing.T) {
@ -12,8 +12,8 @@ func TestLinearRegressionSeries(t *testing.T) {
mainSeries := ContinuousSeries{
Name: "A test series",
XValues: sequence.Values(1.0, 100.0),
YValues: sequence.Values(1.0, 100.0),
XValues: seq.Range(1.0, 100.0),
YValues: seq.Range(1.0, 100.0),
}
linRegSeries := &LinearRegressionSeries{
@ -34,8 +34,8 @@ func TestLinearRegressionSeriesDesc(t *testing.T) {
mainSeries := ContinuousSeries{
Name: "A test series",
XValues: sequence.Values(100.0, 1.0),
YValues: sequence.Values(100.0, 1.0),
XValues: seq.Range(100.0, 1.0),
YValues: seq.Range(100.0, 1.0),
}
linRegSeries := &LinearRegressionSeries{
@ -56,8 +56,8 @@ func TestLinearRegressionSeriesWindowAndOffset(t *testing.T) {
mainSeries := ContinuousSeries{
Name: "A test series",
XValues: sequence.Values(100.0, 1.0),
YValues: sequence.Values(100.0, 1.0),
XValues: seq.Range(100.0, 1.0),
YValues: seq.Range(100.0, 1.0),
}
linRegSeries := &LinearRegressionSeries{

12
market_hours_range.go
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@ -4,7 +4,7 @@ import (
"fmt"
"time"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
"github.com/wcharczuk/go-chart/util"
)
@ -115,31 +115,31 @@ func (mhr MarketHoursRange) GetMarketClose() time.Time {
// GetTicks returns the ticks for the range.
// This is to override the default continous ticks that would be generated for the range.
func (mhr *MarketHoursRange) GetTicks(r Renderer, defaults Style, vf ValueFormatter) []Tick {
times := sequence.Time.MarketHours(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
times := seq.Time.MarketHours(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth := mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)
}
times = sequence.Time.MarketHourQuarters(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
times = seq.Time.MarketHourQuarters(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth = mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)
}
times = sequence.Time.MarketDayCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
times = seq.Time.MarketDayCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth = mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)
}
times = sequence.Time.MarketDayAlternateCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
times = seq.Time.MarketDayAlternateCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth = mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)
}
times = sequence.Time.MarketDayMondayCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
times = seq.Time.MarketDayMondayCloses(mhr.Min, mhr.Max, mhr.GetMarketOpen(), mhr.GetMarketClose(), mhr.GetHolidayProvider())
timesWidth = mhr.measureTimes(r, defaults, vf, times)
if timesWidth <= mhr.Domain {
return mhr.makeTicks(vf, times)

2
sequence/array.go → seq/array.go
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@ -1,4 +1,4 @@
package sequence
package seq
// NewArray creates a new array.
func NewArray(values ...float64) Array {

6
sequence/buffer.go → seq/buffer.go
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@ -1,4 +1,4 @@
package sequence
package seq
import (
"fmt"
@ -47,7 +47,7 @@ func NewBufferWithCapacity(capacity int) *Buffer {
// Buffer is a fifo datastructure that is backed by a pre-allocated array.
// Instead of allocating a whole new node object for each element, array elements are re-used (which saves GC churn).
// Enqueue can be O(n), Dequeue is generally O(1).
// Buffer implements `sequence.Provider`
// Buffer implements `seq.Provider`
type Buffer struct {
array []float64
head int
@ -61,7 +61,7 @@ func (b *Buffer) Len() int {
return b.size
}
// GetValue implements sequence provider.
// GetValue implements seq provider.
func (b *Buffer) GetValue(index int) float64 {
effectiveIndex := (b.head + index) % len(b.array)
return b.array[effectiveIndex]

2
sequence/buffer_test.go → seq/buffer_test.go
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@ -1,4 +1,4 @@
package sequence
package seq
import (
"testing"

29
sequence/linear.go → seq/linear.go
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@ -1,18 +1,18 @@
package sequence
package seq
// Values returns the array values of a linear sequence with a given start, end and optional step.
func Values(start, end float64) []float64 {
// Range returns the array values of a linear seq with a given start, end and optional step.
func Range(start, end float64) []float64 {
return Seq{NewLinear().WithStart(start).WithEnd(end).WithStep(1.0)}.Array()
}
// ValuesWithStep returns the array values of a linear sequence with a given start, end and optional step.
func ValuesWithStep(start, end, step float64) []float64 {
// RangeWithStep returns the array values of a linear seq with a given start, end and optional step.
func RangeWithStep(start, end, step float64) []float64 {
return Seq{NewLinear().WithStart(start).WithEnd(end).WithStep(step)}.Array()
}
// NewLinear returns a new linear generator.
func NewLinear() *Linear {
return &Linear{}
return &Linear{step: 1.0}
}
// Linear is a stepwise generator.
@ -22,7 +22,22 @@ type Linear struct {
step float64
}
// Len returns the number of elements in the sequence.
// Start returns the start value.
func (lg Linear) Start() float64 {
return lg.start
}
// End returns the end value.
func (lg Linear) End() float64 {
return lg.end
}
// Step returns the step value.
func (lg Linear) Step() float64 {
return lg.step
}
// Len returns the number of elements in the seq.
func (lg Linear) Len() int {
if lg.start < lg.end {
return int((lg.end-lg.start)/lg.step) + 1

48
seq/linear_test.go Normal file
View File

@ -0,0 +1,48 @@
package seq
import (
"testing"
assert "github.com/blendlabs/go-assert"
)
func TestRange(t *testing.T) {
assert := assert.New(t)
values := Range(1, 100)
assert.Len(values, 100)
assert.Equal(1, values[0])
assert.Equal(100, values[99])
}
func TestRangeWithStep(t *testing.T) {
assert := assert.New(t)
values := RangeWithStep(0, 100, 5)
assert.Equal(100, values[20])
assert.Len(values, 21)
}
func TestRangeReversed(t *testing.T) {
assert := assert.New(t)
values := Range(10.0, 1.0)
assert.Equal(10, len(values))
assert.Equal(10.0, values[0])
assert.Equal(1.0, values[9])
}
func TestValuesRegression(t *testing.T) {
assert := assert.New(t)
// note; this assumes a 1.0 step is implicitly set in the constructor.
linearProvider := NewLinear().WithStart(1.0).WithEnd(100.0)
assert.Equal(1, linearProvider.Start())
assert.Equal(100, linearProvider.End())
assert.Equal(100, linearProvider.Len())
values := Seq{Provider: linearProvider}.Array()
assert.Len(values, 100)
assert.Equal(1.0, values[0])
assert.Equal(100, values[99])
}

16
sequence/random.go → seq/random.go
View File

@ -1,4 +1,4 @@
package sequence
package seq
import (
"math"
@ -16,14 +16,14 @@ func RandomValuesWithAverage(average float64, count int) []float64 {
return Seq{NewRandom().WithAverage(average).WithLen(count)}.Array()
}
// NewRandom creates a new random sequence.
// NewRandom creates a new random seq.
func NewRandom() *Random {
return &Random{
rnd: rand.New(rand.NewSource(time.Now().Unix())),
}
}
// Random is a random number sequence generator.
// Random is a random number seq generator.
type Random struct {
rnd *rand.Rand
scale *float64
@ -55,12 +55,22 @@ func (r *Random) WithLen(length int) *Random {
return r
}
// Scale returns the scale.
func (r Random) Scale() *float64 {
return r.scale
}
// WithScale sets the scale and returns the Random.
func (r *Random) WithScale(scale float64) *Random {
r.scale = &scale
return r
}
// Average returns the average.
func (r Random) Average() *float64 {
return r.average
}
// WithAverage sets the average and returns the Random.
func (r *Random) WithAverage(average float64) *Random {
r.average = &average

18
seq/random_test.go Normal file
View File

@ -0,0 +1,18 @@
package seq
import (
"testing"
assert "github.com/blendlabs/go-assert"
)
func TestRandomRegression(t *testing.T) {
assert := assert.New(t)
randomProvider := NewRandom().WithLen(100).WithAverage(256)
assert.Equal(100, randomProvider.Len())
assert.Equal(256, *randomProvider.Average())
randomValues := New(randomProvider).Array()
assert.Len(randomValues, 100)
}

33
sequence/sequence.go → seq/sequence.go
View File

@ -1,27 +1,32 @@
package sequence
package seq
import (
"math"
"sort"
)
// New returns a new sequence.
func New(values ...float64) Seq {
// New wraps a provider with a seq.
func New(provider Provider) Seq {
return Seq{Provider: provider}
}
// Values returns a new seq composed of a given set of values.
func Values(values ...float64) Seq {
return Seq{Provider: Array(values)}
}
// Provider is a provider for values for a sequence.
// Provider is a provider for values for a seq.
type Provider interface {
Len() int
GetValue(int) float64
}
// Seq is a utility wrapper for sequence providers.
// Seq is a utility wrapper for seq providers.
type Seq struct {
Provider
}
// Array enumerates the sequence into a slice.
// Array enumerates the seq into a slice.
func (s Seq) Array() (output []float64) {
if s.Len() == 0 {
return
@ -42,7 +47,7 @@ func (s Seq) Each(mapfn func(int, float64)) {
}
// Map applies the `mapfn` to all values in the value provider,
// returning a new sequence.
// returning a new seq.
func (s Seq) Map(mapfn func(i int, v float64) float64) Seq {
output := make([]float64, s.Len())
for i := 0; i < s.Len(); i++ {
@ -51,7 +56,7 @@ func (s Seq) Map(mapfn func(i int, v float64) float64) Seq {
return Seq{Array(output)}
}
// FoldLeft collapses a sequence from left to right.
// FoldLeft collapses a seq from left to right.
func (s Seq) FoldLeft(mapfn func(i int, v0, v float64) float64) (v0 float64) {
if s.Len() == 0 {
return 0
@ -68,7 +73,7 @@ func (s Seq) FoldLeft(mapfn func(i int, v0, v float64) float64) (v0 float64) {
return
}
// FoldRight collapses a sequence from right to left.
// FoldRight collapses a seq from right to left.
func (s Seq) FoldRight(mapfn func(i int, v0, v float64) float64) (v0 float64) {
if s.Len() == 0 {
return 0
@ -85,7 +90,7 @@ func (s Seq) FoldRight(mapfn func(i int, v0, v float64) float64) (v0 float64) {
return
}
// Min returns the minimum value in the sequence.
// Min returns the minimum value in the seq.
func (s Seq) Min() float64 {
if s.Len() == 0 {
return 0
@ -101,7 +106,7 @@ func (s Seq) Min() float64 {
return min
}
// Max returns the maximum value in the sequence.
// Max returns the maximum value in the seq.
func (s Seq) Max() float64 {
if s.Len() == 0 {
return 0
@ -137,8 +142,8 @@ func (s Seq) MinMax() (min, max float64) {
return
}
// Sort returns the sequence sorted in ascending order.
// This fully enumerates the sequence.
// Sort returns the seq sorted in ascending order.
// This fully enumerates the seq.
func (s Seq) Sort() Seq {
if s.Len() == 0 {
return s
@ -148,7 +153,7 @@ func (s Seq) Sort() Seq {
return Seq{Provider: Array(values)}
}
// Median returns the median or middle value in the sorted sequence.
// Median returns the median or middle value in the sorted seq.
func (s Seq) Median() (median float64) {
l := s.Len()
if l == 0 {

4
sequence/sequence_test.go → seq/sequence_test.go
View File

@ -1,4 +1,4 @@
package sequence
package seq
import (
"testing"
@ -85,7 +85,7 @@ func TestSequenceVariance(t *testing.T) {
func TestSequenceNormalize(t *testing.T) {
assert := assert.New(t)
normalized := New(1, 2, 3, 4, 5).Normalize().Array()
normalized := Values(1, 2, 3, 4, 5).Normalize().Array()
assert.NotEmpty(normalized)
assert.Len(normalized, 5)

6
sequence/time.go → seq/time.go
View File

@ -1,4 +1,4 @@
package sequence
package seq
import (
"time"
@ -6,12 +6,12 @@ import (
"github.com/wcharczuk/go-chart/util"
)
// Time is a utility singleton with helper functions for time sequence generation.
// Time is a utility singleton with helper functions for time seq generation.
var Time timeSequence
type timeSequence struct{}
// Days generates a sequence of timestamps by day, from -days to today.
// Days generates a seq of timestamps by day, from -days to today.
func (ts timeSequence) Days(days int) []time.Time {
var values []time.Time
for day := days; day >= 0; day-- {

2
sequence/time_test.go → seq/time_test.go
View File

@ -1,4 +1,4 @@
package sequence
package seq
import (
"testing"

2
sequence/util.go → seq/util.go
View File

@ -1,4 +1,4 @@
package sequence
package seq
import "math"

33
sequence/linear_test.go
View File

@ -1,33 +0,0 @@
package sequence
import (
"testing"
assert "github.com/blendlabs/go-assert"
)
func TestValues(t *testing.T) {
assert := assert.New(t)
values := Values(1, 100)
assert.Len(values, 100)
assert.Equal(1, values[0])
assert.Equal(100, values[99])
}
func TestValuesWithStep(t *testing.T) {
assert := assert.New(t)
values := ValuesWithStep(0, 100, 5)
assert.Equal(100, values[20])
assert.Len(values, 21)
}
func TestValuesReversed(t *testing.T) {
assert := assert.New(t)
values := Values(10.0, 1.0)
assert.Equal(10, len(values))
assert.Equal(10.0, values[0])
assert.Equal(1.0, values[9])
}

14
sma_series_test.go
View File

@ -4,7 +4,7 @@ import (
"testing"
"github.com/blendlabs/go-assert"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
"github.com/wcharczuk/go-chart/util"
)
@ -33,8 +33,8 @@ func TestSMASeriesGetValue(t *testing.T) {
assert := assert.New(t)
mockSeries := mockValuesProvider{
sequence.Values(1.0, 10.0),
sequence.Values(10, 1.0),
seq.Range(1.0, 10.0),
seq.Range(10, 1.0),
}
assert.Equal(10, mockSeries.Len())
@ -64,8 +64,8 @@ func TestSMASeriesGetLastValueWindowOverlap(t *testing.T) {
assert := assert.New(t)
mockSeries := mockValuesProvider{
sequence.Values(1.0, 10.0),
sequence.Values(10, 1.0),
seq.Range(1.0, 10.0),
seq.Range(10, 1.0),
}
assert.Equal(10, mockSeries.Len())
@ -90,8 +90,8 @@ func TestSMASeriesGetLastValue(t *testing.T) {
assert := assert.New(t)
mockSeries := mockValuesProvider{
sequence.Values(1.0, 100.0),
sequence.Values(100, 1.0),
seq.Range(1.0, 100.0),
seq.Range(100, 1.0),
}
assert.Equal(100, mockSeries.Len())

4
stacked_bar_chart.go
View File

@ -7,7 +7,7 @@ import (
"math"
"github.com/golang/freetype/truetype"
"github.com/wcharczuk/go-chart/sequence"
"github.com/wcharczuk/go-chart/seq"
util "github.com/wcharczuk/go-chart/util"
)
@ -202,7 +202,7 @@ func (sbc StackedBarChart) drawYAxis(r Renderer, canvasBox Box) {
r.LineTo(canvasBox.Right+DefaultHorizontalTickWidth, canvasBox.Bottom)
r.Stroke()
ticks := sequence.ValuesWithStep(0.0, 1.0, 0.2)
ticks := seq.RangeWithStep(0.0, 1.0, 0.2)
for _, t := range ticks {
axisStyle.GetStrokeOptions().WriteToRenderer(r)
ty := canvasBox.Bottom - int(t*float64(canvasBox.Height()))