What is the value of C after the following MATLAB command?A = [ 1 2 ];B = [ 3 4 ];C = [ A' [ B; B] ]';Question 15Select one:a.[ 1 2; 3 4; 3 4]b.[ 1 3 3; 2 4 4]c.[ 1 3 4; 2 3 4]d.[ 1 2; 3 3; 4 4]e.None of the above
Question
What is the value of C after the following MATLAB command?A = [ 1 2 ];B = [ 3 4 ];C = [ A' [ B; B] ]';Question 15Select one:a.[ 1 2; 3 4; 3 4]b.[ 1 3 3; 2 4 4]c.[ 1 3 4; 2 3 4]d.[ 1 2; 3 3; 4 4]e.None of the above
Solution
Let's break down the MATLAB commands:
-
A = [ 1 2 ];This creates a row vector A with elements 1 and 2. -
B = [ 3 4 ];This creates a row vector B with elements 3 and 4. -
[ B; B]This concatenates B vertically (i.e., along the column), resulting in a 2x2 matrix: [3 4; 3 4]. -
A'This transposes A from a row vector into a column vector: [1; 2]. -
C = [ A' [ B; B] ]';This concatenates the transposed A and the 2x2 matrix horizontally (i.e., along the row), and then transposes the result. The resulting matrix C is:
[ 1 3 3
2 4 4]
So, the correct answer is b. [ 1 3 3; 2 4 4].
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