trace

trace

Performs the trace operation on the given matrix.

References

• http://en.wikipedia.org/wiki/Trace_(linear_algebra)

trace(M)

Sums all elements on the diagonal.

Argument M

Matrix

Returns 1. entry

Scalar

Example

trace([1,2;3,4])

Results in the value 5.

trace(x)

The trace of a 1x1 matrix is the element itself.

Argument x

Scalar

Returns 1. entry

Scalar

Example

trace(10)

Results in the value 10.