Function trace
Calculate the trace of a matrix: the sum of the elements on the main diagonal of a square matrix.
Syntax
trace(x)
Parameters
Parameter | Type | Description |
---|---|---|
x |
Array | Matrix | A matrix |
Returns
Type | Description |
---|---|
number | The trace of x |
Examples
trace([[1, 2], [3, 4]]); // returns 5
var A = [
[1, 2, 3],
[-1, 2, 3],
[2, 0, 3]
]
trace(A); // returns 6