Class Vector
In: lib/matrix.rb
Parent: Object

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:

To access elements:

  • [](i)

To enumerate the elements:

Vector arithmetic:

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

Vector functions:

Conversion to other data types:

String representations:

Methods

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

Included Modules

ExceptionForMatrix

Public Class methods

[](*array)

Creates a Vector from a list of elements. 

  Vector[7, 4, ...]
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.

new(method, array, copy)

For internal use.

Public Instance methods

*(x)

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

+(v)

Vector addition.

-(v)

Vector subtraction.

==(other)

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

[](i)

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

clone()

Return a copy of the vector.

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

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

compare_by(elements)

For internal use.

covector()

Creates a single-row matrix from this vector.

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

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

eqn?(other)

Alias for #==

hash()

Return a hash-code for the vector.

inner_product(v)

Returns the inner product of this vector with the other. 

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

Alias for collect

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

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

r()

Returns the modulus (Pythagorean distance) of the vector. 

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

Returns the number of elements in the vector.

to_a()

Returns the elements of the vector in an array.

To view or add comments on this documentation, please go to the API wiki.

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