The MATLAB function [r, c] = size(mat) would provide the number of rows (r) and columns (c) in the matrix mat.
In MATLAB, the function [r, c] = size(mat) serves as a versatile tool for extracting crucial information about the structure of a matrix, mat. The two output variables, r and c, correspond to the number of rows and columns in the matrix, respectively. This function is particularly useful when working with matrices of varying dimensions, as it allows for dynamic and efficient handling of data. Whether you are performing computations, reshaping matrices, or implementing algorithms, having access to the size information through this function enables you to tailor your code to the specific characteristics of the input matrix, enhancing the flexibility and adaptability of your MATLAB scripts.