Update ualgebra.js

plainas · plainas · commit 9a2957566bda · 2013-12-09T17:35:11.000+01:00
fixed cofactor matrix calculation.
diff --git a/ualgebra.js b/ualgebra.js
@@ -133,7 +133,7 @@ function cofactorMatrix(m){
 	for(var i = 0; i < m.length; i++){
 		var row = [];
 		for(var j = 0; j < m.length; j++){
-			var cofactorval = cofactor(m,i,j);
+			var cofactorval = cofactor(m,i,j)*Math.pow(-1,i+j)
 			row.push(cofactorval);
 		}
 		cofactors.push(row);

Original file line number	Diff line number	Diff line change
`@@ -133,7 +133,7 @@ function cofactorMatrix(m){`
`133`	`133`	`for(var i = 0; i < m.length; i++){`
`134`	`134`	`var row = [];`
`135`	`135`	`for(var j = 0; j < m.length; j++){`
`136`		`- var cofactorval = cofactor(m,i,j);`
	`136`	`+ var cofactorval = cofactor(m,i,j)*Math.pow(-1,i+j)`
`137`	`137`	`row.push(cofactorval);`
`138`	`138`	`}`
`139`	`139`	`cofactors.push(row);`