@saehrimnir/druidjs / LTSA

Class: LTSA<T>

Defined in: dimred/LTSA.js:22

Local Tangent Space Alignment (LTSA)

A nonlinear dimensionality reduction algorithm that represents the local geometry of the manifold by tangent spaces and then aligns them to reveal the global structure.

Template

Extends

• DR

Type Parameters

Type Parameter	Description
T extends InputType

Constructors

Constructor

new LTSA<T>(X: T, parameters: Partial<ParametersLTSA>): LTSA<T>;

Defined in: dimred/LTSA.js:30

Local Tangent Space Alignment

Parameters

Parameter	Type	Description
X	T	The high-dimensional data.
parameters	Partial<ParametersLTSA>	Object containing parameterization of the DR method.

Returns

LTSA<T>

See

https://epubs.siam.org/doi/abs/10.1137/S1064827502419154

Overrides

DR.constructor

Properties

Property	Type	Inherited from	Defined in
__input	T	DR.__input	dimred/DR.js:38
_D	number	DR._D	dimred/DR.js:20
_is_initialized	boolean	DR._is_initialized	dimred/DR.js:26
_N	number	DR._N	dimred/DR.js:22
_parameters	ParametersLTSA	DR._parameters	dimred/DR.js:41
_randomizer	Randomizer	DR._randomizer	dimred/DR.js:24
_type	"array" | "matrix" | "typed"	DR._type	dimred/DR.js:46
X	Matrix	DR.X	dimred/DR.js:48
Y	Matrix	DR.Y	dimred/DR.js:50

Accessors

projection

Get Signature

get projection(): T;

Defined in: dimred/DR.js:211

Returns

T

The projection in the type of input X.

Inherited from

DR.projection

Methods

check_init()

check_init(): DR<T, ParametersLTSA>;

Defined in: dimred/DR.js:202

If the respective DR method has an init function, call it before transform.

Returns

DR<T, ParametersLTSA>

Inherited from

DR.check_init

---

generator()

generator(): Generator<T, T, void>;

Defined in: dimred/LTSA.js:63

Transforms the inputdata X to dimensionality d.

Returns

Generator<T, T, void>

A generator yielding the intermediate steps of the projection.

Overrides

DR.generator

---

init()

abstract init(...args: unknown[]): void;

Defined in: dimred/DR.js:193

Parameters

Parameter	Type	Description
...args	unknown[]	-

Returns

void

Inherited from

DR.init

---

parameter()

Call Signature

parameter(): ParametersLTSA;

Defined in: dimred/DR.js:74

Get all Parameters.

Returns

ParametersLTSA

Inherited from

DR.parameter

Call Signature

parameter<K>(name: K): ParametersLTSA[K];

Defined in: dimred/DR.js:80

Get value of given parameter.

Type Parameters

Type Parameter	Description
K extends keyof ParametersLTSA

Parameters

Parameter	Type	Description
name	K	Name of the parameter.

Returns

ParametersLTSA[K]

Inherited from

DR.parameter

Call Signature

parameter<K>(name: K, value: ParametersLTSA[K]): LTSA<T>;

Defined in: dimred/DR.js:87

Set value of given parameter.

Type Parameters

Type Parameter	Description
K extends keyof ParametersLTSA

Parameters

Parameter	Type	Description
name	K	Name of the parameter.
value	ParametersLTSA[K]	Value of the parameter to set.

Returns

LTSA<T>

Inherited from

DR.parameter

---

transform()

transform(): T;

Defined in: dimred/LTSA.js:73

Transforms the inputdata X to dimenionality d.

Returns

T

Overrides

DR.transform

---

transform_async()

transform_async(...args: unknown[]): Promise<T>;

Defined in: dimred/DR.js:233

Computes the projection.

Parameters

Parameter	Type	Description
...args	unknown[]	Arguments the transform method of the respective DR method takes.

Returns

Promise<T>

The dimensionality reduced dataset.

Inherited from

DR.transform_async

---

generator()

static generator<T>(X: T, parameters: Partial<ParametersLTSA>): Generator<T, T, void>;

Defined in: dimred/LTSA.js:131

Type Parameters

Type Parameter	Description
T extends InputType

Parameters

Parameter	Type	Description
X	T	-
parameters	Partial<ParametersLTSA>	-

Returns

Generator<T, T, void>

Overrides

DR.generator

---

transform()

static transform<T>(X: T, parameters: Partial<ParametersLTSA>): T;

Defined in: dimred/LTSA.js:120

Type Parameters

Type Parameter	Description
T extends InputType

Parameters

Parameter	Type	Description
X	T	-
parameters	Partial<ParametersLTSA>	-

Returns

T

Overrides

DR.transform

---

transform_async()

static transform_async<T>(X: T, parameters: Partial<ParametersLTSA>): Promise<T>;

Defined in: dimred/LTSA.js:143

Type Parameters

Type Parameter	Description
T extends InputType

Parameters

Parameter	Type	Description
X	T	-
parameters	Partial<ParametersLTSA>	-

Returns

Promise<T>

Overrides

DR.transform_async