Calculates the determinant of a two-dimensional floating point array which is interpreted as a matrix.
Mat Det x=a([i, j])[,n]
a():name of a two-dimensional floating point array
x:aexp
i, j, n:integer expression
Mat Det x=a([i, j])[,n] calculates the determinant of a square matrix of type (n,n). A determinant of a square section of a matrix can also be calculated. This matrix section is defined by i and j for row and column offsets in a() and by n for the number of elements. An internal matrix of (n,n) type is thereby created at i-th row and j-th column.
OpenW # 1
Data 2,4.5,6,3.2,7,1.7,-4,12
Data -3,5,9,-2.1,6,9,11,3
Data 11.4,2.3,6,3.2,6,1.2,-5,7
Data 3,5,6,8.2,4.1,-5.2,6.2,7.9
Data 1,2.3,9,8.1,0,4.2,5,3.7
Data 4.2,7.1,8.3,9.1,-5,-3,-1,0
Data 2.0,3,9.1,0,0,7.1,-3,8.8
Data 2.1,9,3.3,4,5,-1,-2,0
Global Double a(1 .. 8, 1 .. 8), x, y, z
Global Double b(1 .. 4, 1 .. 4), k%
Mat Read a()
Mat Print a(), 5, 2 // original matrix
//to calculate the determinant
Mat Det x = a()
Print "Determinant = "; x
Print "Press any Key"
KeyGet k%
Cls
Mat Det y = a(3, 2), 4//calculates the determinant
//of a matrix segment
Print "Segment determinant= "; y
Mat Cpy b() = a(3, 2), 4, 4
Mat Print b(), 5, 2
Mat Det z = b()
Print "Determinant = "; z
{Created by Sjouke Hamstra; Last updated: 14/10/2014 by James Gaite}