func TestFlattenFlatMap(t *testing.T) {
m := data.Map{
"abc": data.Float(123),
"def": data.Float(456),
"ghi": data.Float(789),
}
Convey("Given a flat data.Map", t, func() {
Convey("when flatten it", func() {
a := []*kv{}
err := Flatten(m, func(k string, x float32) {
a = append(a, &kv{
key: k,
value: x,
})
})
Convey("it should succeed.", func() {
So(err, ShouldBeNil)
Convey("and the flatten slice should be converted correctly.", func() {
So(len(a), ShouldEqual, len(m))
for _, e := range a {
mValue, ok := m[e.key]
So(ok, ShouldBeTrue)
So(e.value, ShouldEqual, mValue)
}
})
})
})
})
}
func (s *source) Parse(line string, lineNo int) (data.Map, error) {
line = strings.TrimSpace(line)
fields := strings.Split(line, ",")
if len(fields) == 0 {
return nil, perline.Pass
}
if len(fields) != len(schema) {
return nil, fmt.Errorf("invalid csv line at %s:%d", s.path, lineNo)
}
fv := data.Map{}
for i := range schema {
if schema[i].isString {
if schema[i].name != "label" {
// key names on Jubatus
key := fmt.Sprintf("%s$%s@str#bin/bin", schema[i].name, fields[i])
fv[key] = data.Float(1)
}
} else {
x, err := strconv.ParseFloat(fields[i], 32)
if err != nil {
return nil, fmt.Errorf("invalid input at %s:%d", s.path, lineNo)
}
if x != 0 {
// key names on Jubatus
key := schema[i].name + "@num"
fv[key] = data.Float(x)
}
}
}
return data.Map{
"feature_vector": fv,
}, nil
}
func TestFlattenNestedArray(t *testing.T) {
m := data.Map{
"a": data.Array{data.Array{}, data.Array{data.Float(123), data.Float(456), data.Float(789)}},
}
Convey("Given a flat data.Map having a data.Array", t, func() {
Convey("when flatten it", func() {
a := []*kv{}
err := Flatten(m, func(k string, x float32) {
a = append(a, &kv{
key: k,
value: x,
})
})
Convey("it should succeed.", func() {
So(err, ShouldBeNil)
Convey("and the flatten slice should be converted correctly.", func() {
So(len(a), ShouldEqual, 3)
})
})
})
})
}
func TestFlattenNestedMap(t *testing.T) {
m := data.Map{
"a": data.Float(123),
"b": data.Map{
"c": data.Float(456),
"d": data.Map{},
"e": data.Float(789),
},
"f": data.Map{},
"g": data.Float(1234),
"h": data.Map{
"i": data.Map{
"j": data.Map{
"k": data.Map{
"l": data.Map{
"m": data.Map{
"n": data.Map{
"o": data.Float(5678),
},
},
},
},
},
},
},
}
flattenM := data.Map{
"a": data.Float(123),
"b\x00c": data.Float(456),
"b\x00e": data.Float(789),
"g": data.Float(1234),
"h\x00i\x00j\x00k\x00l\x00m\x00n\x00o": data.Float(5678),
}
Convey("Given a nested data.Map", t, func() {
a := []*kv{}
err := Flatten(m, func(k string, x float32) {
a = append(a, &kv{
key: k,
value: x,
})
})
Convey("it should succeed.", func() {
So(err, ShouldBeNil)
Convey("and the flatten slice should be converted correctly.", func() {
So(len(a), ShouldEqual, len(flattenM))
for _, e := range a {
mValue, ok := flattenM[e.key]
So(ok, ShouldBeTrue)
So(e.value, ShouldEqual, mValue)
}
})
})
})
}
func TestPassiveAggressiveStateLoad(t *testing.T) {
ctx := core.NewContext(nil)
c := PassiveAggressiveStateCreator{}
pas, err := c.CreateState(ctx, data.Map{
"regularization_weight": data.Float(3.402823e+38),
"sensitivity": data.Float(0.1),
})
if err != nil {
t.Fatal(err)
}
pa := pas.(*PassiveAggressiveState)
for i := 0; i < 100; i++ {
if err := pa.Write(ctx, &core.Tuple{
Data: data.Map{
"value": data.Float(i),
"feature_vector": data.Map{
"n": data.Int(i),
},
},
}); err != nil {
t.Fatal(err)
}
}
Convey("Given a trained PassiveAggressiveState", t, func() {
Convey("when saving it", func() {
buf := bytes.NewBuffer(nil)
err := pa.Save(ctx, buf, data.Map{})
Convey("it should succeed.", func() {
So(err, ShouldBeNil)
Convey("and the loaded state should be same.", func() {
pa2, err := c.LoadState(ctx, buf, data.Map{})
So(err, ShouldBeNil)
So(pa2, ShouldResemble, pa)
fv := FeatureVector{
"n": data.Int(123),
}
v, err := pa.pa.Estimate(fv)
So(err, ShouldBeNil)
v2, err := pa2.(*PassiveAggressiveState).pa.Estimate(fv)
So(err, ShouldBeNil)
So(v2, ShouldResemble, v)
})
})
})
})
}
func Example() {
v := data.Map{
"labelA": data.Float(2.5),
"labelB": data.Float(0.7),
"labelC": data.Float(-1.2),
}
s, _ := Softmax(v)
fmt.Printf("labelA: %0.5f\n", toFloat(s["labelA"]))
fmt.Printf("labelB: %0.5f\n", toFloat(s["labelB"]))
fmt.Printf("labelC: %0.5f\n", toFloat(s["labelC"]))
// Output:
// labelA: 0.84032
// labelB: 0.13890
// labelC: 0.02078
}
// WeightBinary creates a map having weights of each word. The weight is 1 if
// there's at least one word, or 0 otherwise. Because feature vectors created
// by this function is sparse, all values in resulting maps are 1. In other
// words, instead of having 0 as a value, a key doesn't exist for a word that
// is not in the given array.
func WeightBinary(a []string) data.Map {
res := data.Map{}
for _, s := range a {
res[s] = data.Float(1)
}
return res
}
func unigram(s string) FeatureVector {
fv := make(FeatureVector)
for _, r := range s {
fv[string(r)] = data.Float(1)
}
return fv
}
// jubatus::core::classifier::linear_classifier::classify_with_scores
func (s model) scores(v fVectorForScores) LScores {
scores := make(LScores)
for l, w := range s {
var score float32
for _, x := range v {
score += x.value * w[x.dim].Weight
}
scores[string(l)] = data.Float(score)
}
return scores
}
func (s *SourceCreator) GenerateStream(ctx *core.Context, w core.Writer) error {
device := new(Device)
// devName := []string{"dev1", "dev2", "dev3", "dev4", "dev5"}
// devProb := []float64{0.4, 0.3, 0.15, 0.1, 0.05}
devName := []string{"dev1", "dev2"}
devProb := []float64{0.5, 0.5}
pickDev := func() string {
r := rand.Float64()
for i, p := range devProb {
if r < p {
return devName[i]
}
r -= p
}
return devName[len(devName)-1]
}
// device.MakeDevice(pickDev())
device.num = 0
temp := &device.sensorData[0]
humid := &device.sensorData[1]
for {
device.ID = pickDev()
device.num += 1
temp.MakeData("temp", 0, 30)
humid.MakeData("humid", 0, 100)
t := core.NewTuple(data.Map{
"deviceID": data.String(device.ID),
"num": data.Int(device.num),
"time": data.Float(float64(time.Now().Second()) + float64(time.Now().Nanosecond())/1e+9),
temp.ID: data.Float(float64(temp.value)),
humid.ID: data.Float(float64(humid.value)),
})
if err := w.Write(ctx, t); err != nil {
return err
}
time.Sleep(s.interval)
}
}
func TestAROWStateSaveLoad(t *testing.T) {
ctx := core.NewContext(nil)
c := AROWStateCreator{}
as, err := c.CreateState(ctx, data.Map{
"regularization_weight": data.Float(0.001),
})
if err != nil {
t.Fatal(err)
}
a := as.(*AROWState)
labels := []data.String{"a", "b", "c", "d"}
for i := 0; i < 100; i++ {
if err := a.Write(ctx, &core.Tuple{
Data: data.Map{
"label": labels[i%len(labels)],
"feature_vector": data.Map{
"n": data.Int(i),
},
},
}); err != nil {
t.Fatal(err)
}
}
Convey("Given a trained AROWState", t, func() {
Convey("when saving it", func() {
buf := bytes.NewBuffer(nil)
err := a.Save(ctx, buf, data.Map{})
Convey("it should succeed.", func() {
So(err, ShouldBeNil)
Convey("and the loaded state should be same.", func() {
a2, err := c.LoadState(ctx, buf, data.Map{})
So(err, ShouldBeNil)
// Because AROW contains sync.RWMutex, this assertion may
// fail if its implementation changes.
So(a2, ShouldResemble, a)
fv := FeatureVector(data.Map{"n": data.Int(10)})
s, err := a.arow.Classify(fv)
So(err, ShouldBeNil)
s2, err := a2.(*AROWState).arow.Classify(fv)
So(err, ShouldBeNil)
So(s2, ShouldResemble, s)
})
})
})
})
}
// WeightTF creates a map having a word as a key and its count (i.e. tf) as
// a value.
func WeightTF(a []string) data.Map {
m := map[string]int{}
for _, s := range a {
c := m[s]
m[s] = c + 1
}
res := data.Map{}
for k, v := range m {
res[k] = data.Float(v)
}
return res
}
// WeightLogTF creates a map having a word as a key and its log(1 + tf) as
// a value. This function is useful when some words appear too much but
// binary weight isn't sufficient.
func WeightLogTF(a []string) data.Map {
m := map[string]int{}
for _, s := range a {
c := m[s]
m[s] = c + 1
}
res := data.Map{}
for k, v := range m {
res[k] = data.Float(math.Log(1 + float64(v)))
}
return res
}
// Softmax calculates softmax.
func Softmax(v data.Map) (data.Map, error) {
ret := make(data.Map)
if len(v) == 0 {
return ret, nil
}
// copy values to an array to sort in logSumExp().
values, err := mapToValues(v)
if err != nil {
return nil, err
}
lse := logSumExp(values)
for k, x := range v {
val, err := data.AsFloat(x)
if err != nil {
return nil, err
}
ret[k] = data.Float(math.Exp(val - lse))
}
return ret, nil
}
func (s *source) Parse(line string, lineNo int) (data.Map, error) {
line = strings.TrimSpace(line)
fields := strings.Split(line, " ")
if len(fields) == 0 {
return nil, perline.Pass
}
label := fields[0]
fv := make(data.Map)
for _, field := range fields[1:] {
ix := strings.Index(field, ":")
if ix < 0 {
return nil, fmt.Errorf("invalid libsvm format at %s:%d", s.path, lineNo)
}
v, err := strconv.ParseFloat(field[ix+1:], 32)
if err != nil {
return nil, fmt.Errorf("%v at %s:%d", err, s.path, lineNo)
}
fv[field[:ix]] = data.Float(v) / 255
}
return data.Map{
"label": data.String(label),
"feature_vector": fv,
}, nil
}
func (r *source) GenerateStream(ctx *core.Context, w core.Writer) error {
numFieldNames := []string{
"家賃(万円)",
"駅からの徒歩時間 (分)",
"専有面積 (m*m)",
"築年数 (年)",
"階数",
}
defer r.file.Close()
if r.training {
for {
line, err := r.readLine()
if err != nil {
if err == io.EOF {
return nil
}
return err
}
if line[0] == '#' {
continue
}
fields := strings.Split(line, ", ")
if len(fields) != 6 {
panic("hoge")
}
value, err := data.ToFloat(data.String(fields[0]))
if err != nil {
panic(err)
}
fv := make(data.Map)
for i := 1; i < len(numFieldNames); i++ {
x, err := data.ToFloat(data.String(fields[i]))
if err != nil {
panic(err)
}
fv[numFieldNames[i]] = data.Float(x)
}
fv[fields[len(fields)-1]] = data.Float(1)
now := time.Now()
w.Write(ctx, &core.Tuple{
Data: data.Map{
"value": data.Float(value),
"feature_vector": fv,
},
Timestamp: now,
ProcTimestamp: now,
})
}
} else {
fv := make(data.Map)
i := 1
for {
line, err := r.readLine()
if err != nil {
if err == io.EOF {
return nil
}
return err
}
if line == "" || line[0] == '#' {
continue
}
fields := strings.Split(line, ":")
if len(fields) != 2 {
panic("hoge")
}
for i := range fields {
fields[i] = strings.TrimSpace(fields[i])
}
if i < len(numFieldNames) {
x, err := data.ToFloat(data.String(fields[1]))
if err != nil {
panic(err)
}
fv[numFieldNames[i]] = data.Float(x)
i++
} else {
if fields[0] != "aspect" {
panic(fields)
}
aspect := strings.Trim(fields[1], "\"")
fv[aspect] = data.Float(1)
break
}
}
now := time.Now()
w.Write(ctx, &core.Tuple{
Data: data.Map{
"feature_vector": fv,
},
Timestamp: now,
ProcTimestamp: now,
})
}
return nil
}