MATLAB Matrix and Vector Operations 4

Question 1

What does `pinv(A)` compute when A is not square?

Accepted Answer

The Moore-Penrose pseudoinverse of A

Answer

pinv computes the Moore-Penrose pseudoinverse, which provides a least-squares solution for non-square or singular matrices.

Question 2

Which MATLAB command creates a 5x5 matrix of uniformly distributed random numbers?

Accepted Answer

rand(5)

Answer

rand(5) generates a 5x5 matrix with values uniformly distributed between 0 and 1.

Question 3

What is the MATLAB syntax to flip a matrix A left-to-right?

Accepted Answer

fliplr(A)

Answer

fliplr reverses the order of columns, effectively reflecting the matrix horizontally.

Question 4

How do you compute the condition number of matrix A in MATLAB?

Accepted Answer

cond(A)

Answer

cond(A) returns the 2-norm condition number, which indicates sensitivity of the solution to perturbations.

Question 5

What does `kron(A, B)` compute in MATLAB?

Accepted Answer

The Kronecker tensor product of A and B

Answer

kron computes the Kronecker tensor product, replacing each element of A with that scalar times B.

MATLAB - MATLAB Technical Computing Practice Test