Question

Rearrange matrix A=[1 2; 3 4] into 1×4 using reshape function, give the commands and show a print-screen of the result.

a) A = reshape(A, 1, 4); disp(A)
b) A = reshape(A, 4, 1); disp(A)
c) A = reshape(A, 2, 2); disp(A)
d) A = reshape(A, 1, 2); disp(A)

Answer 1

To reshape the matrix A into a 1x4 vector, the correct command is 'A = reshape(A, 1, 4); disp(A);'. This command reshapes the 2x2 matrix into a single row with four columns and displays it.

Step-by-step explanation:

The student is working with matrices and the reshape function, a common topic in computer programming, particularly when dealing with arrays in software such as MATLAB or Python. To rearrange the matrix A = [1 2; 3 4] into a 1×4 vector, the correct command is:

A = reshape(A, 1, 4); disp(A);

This command 'reshapes' the matrix A into a 1 row by 4 columns matrix, essentially flattening the 2×2 matrix into a single row vector. The 'disp' function is then used to display the reshaped matrix A. The other commands listed, such as 'reshape(A, 4, 1)', reshape the matrix into different dimensions and are not the correct choices for making A a 1 by 4 vector.