Ruby/Справочник/Vector

Класс Vector

The Vector class represents a mathematical vector, which is useful in its own right, and also constitutes a row or column of a Matrix.

Method Catalogue

To create a Vector:

• Vector.[](*array)
• Vector.elements(array, copy = true)

To access elements:

• [](i)

To enumerate the elements:

• #each2(v)
• #collect2(v)

Vector arithmetic:

• *(x) "is matrix or number"
• +(v)
• -(v)

Vector functions:

• #inner_product(v)
• #collect
• #map
• #map2(v)
• #r
• #size

Conversion to other data types:

• #covector
• #to_a
• #coerce(other)

String representations:

• #to_s
• #inspect

---

Примеси

ExceptionForMatrix ()

Методы класса

[], elements, new

Методы объекта

[], *, +, -, ==, clone, coerce, collect2, collect, compare_by, covector, each2, eqn?, hash, init_elements, inner_product, inspect, map2, map, r, size, to_a, to_s

Vector::[]

---

 Vector::[](*array)

---

Создает Vector из списка элементов.

 Vector[7, 4, ...]

Vector::elements

---

 Vector::elements(array, copy = true)

---

Creates a vector from an Array. The optional second argument specifies whether the array itself or a copy is used internally.

Vector::new

---

 Vector::new(method, array, copy)

---

For internal use.

Vector#*

---

 *(x)

---

Multiplies the vector by x, where x is a number or another vector.

Vector#+

---

 +(v)

---

Vector addition.

Vector#-

---

 -(v)

---

Vector subtraction.

Vector#==

---

 ==(other)

---

Returns true iff the two vectors have the same elements in the same order.

(еще известен как eqn?)

Vector#[]

---

 [](i)

---

Returns element number i (starting at zero) of the vector.

Vector#clone

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 clone()

---

Return a copy of the vector.

Vector#coerce

---

 coerce(other)

---

FIXME: describe Vector#coerce.

Vector#collect

---

 collect( {|e| ...}

---

Like Array#collect.

(еще известен как map)

Vector#collect2

---

 collect2(v) {|e1, e2| ...}

---

Collects (as in Enumerable#collect) over the elements of this vector and v in conjunction.

Vector#compare_by

---

 compare_by(elements)

---

For internal use.

Vector#covector

---

 covector()

---

Creates a single-row matrix from this vector.

Vector#each2

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 each2(v) {|e1, e2| ...}

---

Iterate over the elements of this vector and v in conjunction.

Vector#eqn?

---

 eqn?(other)

---

Alias for #==

Vector#hash

---

 hash()

---

Return a hash-code for the vector.

Vector#init_elements

---

 init_elements(array, copy)

---

For internal use.

Vector#inner_product

---

 inner_product(v)

---

Returns the inner product of this vector with the other.

 Vector[4,7].inner_product Vector[10,1]  => 47

Vector#inspect

---

 inspect()

---

Overrides Object#inspect

Vector#map

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 map(

---

Alias for #collect

Vector#map2

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 map2(v) {|e1, e2| ...}

---

Like Vector#collect2, but returns a Vector instead of an Array.

Vector#r

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 r()

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Returns the modulus (Pythagorean distance) of the vector.

 Vector[5,8,2].r => 9.643650761

Vector#size

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 size()

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Returns the number of elements in the vector.

Vector#to_a

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 to_a()

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Returns the elements of the vector in an array.

Vector#to_s

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 to_s()

---

Overrides Object#to_s