# Class: LinearAlgebra::ArthmeticSequence

Inherits:
Function
• Object
show all
Defined in:
lib/linear_algebra/arthmetic_sequence.rb

## Instance Method Summary collapse

• constructor

A new instance of ArthmeticSequence.

• Modified to count from zero instead of one.

## Constructor Details

### #initialize(a) ⇒ ArthmeticSequence

Returns a new instance of ArthmeticSequence

 ``` 8 9 10 11 12 13 14 15 16``` ```# File 'lib/linear_algebra/arthmetic_sequence.rb', line 8 def initialize a i = 0 while i < a.length - 2 raise ArgumentError, "Elements must have a common difference" unless a[i+1] - a[i] == a[i+2] - a[i+1] i += 1 end @common_difference, @a = a[1] - a[0], a super @common_difference, @a[0] end```

## Instance Attribute Details

### #a ⇒ Object(readonly)Also known as: to_a

Returns the value of attribute a

 ``` 4 5 6``` ```# File 'lib/linear_algebra/arthmetic_sequence.rb', line 4 def a @a end```

### #common_difference ⇒ Object(readonly)Also known as: d

Returns the value of attribute common_difference

 ``` 4 5 6``` ```# File 'lib/linear_algebra/arthmetic_sequence.rb', line 4 def common_difference @common_difference end```

## Instance Method Details

### #to_s ⇒ Object

Modified to count from zero instead of one

 ``` 17 18 19``` ```# File 'lib/linear_algebra/arthmetic_sequence.rb', line 17 def to_s # Modified to count from zero instead of one "a[n] = #{a[0]} + #{idx d}n" end```