# Manuals/calci/MATRIXTRACE

**MATRIXTRACE (a)**

- is any matrix.

## Description

- This function shows the trace value of the given matrix.
- In , is any matirx.
- The trace of an nxn square matrix is defined to be the sum of all main diagonal entries.
- Consider the matrix A with the elements .
- Here trace of the matrix A is =.Where denotes the entry on the row and column of A.
- Now consider 3x3 matrix
- Here tr(A)= a+e+j.

## Examples

- MATRIXTRACE([[5,19,-36,10,7.6],[20,-17,4.5,43,87]]) = -12
- MATRIXTRACE([[10,18,-76,-98],[12,85.4,65,78],[10,15,76,123]]) = 171.4
- MATRIXTRACE([[21,54,98,10,17,23],[90,87,65,43,12,10],[13,-543,-987,-154,100,32],[67,87,97,32,11,987]]) = -847