What does rank mean in matlab?

The rank () function in matlab is a function to find the rank of matrix.

Extension: In linear algebra, the column rank of matrix A is the maximum number of linearly independent columns of A; Similarly, the row rank of matrix A is the maximum number of linearly independent longitudinal rows of A. ..

For example:

For the rank of A, just enter the following command in the command line of MATLAB and press OK to end.

A=[2，3，4； 6,7,9; 0,0, 1];

Rank (a)

The results can be displayed as follows: