Ruby | Matrix cofactor() function
The cofactor() is an inbuilt method in Ruby returns the cofactor of the given index.
Syntax: mat1.cofactor(i, j)
Parameters: The function needs two index i and j, whose cofactor is to be returned.
Return Value: It returns the cofactor of the given index.
Example 1:
require "matrix"
mat1 = Matrix[[ 1 , 21 ], [ 31 , 18 ]]
puts mat1.cofactor( 1 , 1 )
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Output:
1
Example 2:
require "matrix"
mat1 = Matrix[[ 1 , 1 , 5 ], [ 1 , 1 , 5 ], [ 1 , 2 , 5 ]]
puts mat1.cofactor( 1 , 2 )
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Output:
-1
Last Updated :
07 Jan, 2020
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