Final answer:
The MATLAB function used to find the largest value in an array is 'max'. It can return the maximum value per column or row when dimensionality is specified, or the overall maximum when applying the function to the entire array.
Step-by-step explanation:
The MATLAB function that returns the largest value in the array is max. When this function is used without specifying a dimension, it returns the largest element in an array. However, if you provide a dimension (for example, 1 for columns or 2 for rows), max will return the largest value in each column or row, respectively. For two-dimensional arrays, max(A) will give you the maximum value from each column, and max(A,[],2) will give the maximum value from each row. If you want to find the maximum value of the entire array, you can use max(A(:)).