Question

The value of p after this command: A =
[1:4; 5:8; 9:12]; p = size(A);.
a-will be 12
b-will be a 3-by-4 matrix
c-will be a 2-element vector
d-4​

Answer 1

Given:

The command A = [1:4; 5:8; 9:12];

To find:

The value of p after this command: A = [1:4; 5:8; 9:12]; p = size(A);.

Solution:

From given, we have a command,

A = [1:4; 5:8; 9:12];

The above command represents a 2 - element vector.

A =

   1     2     3     4

   5     6     7     8

   9    10    11    12

So, we get an array of size 3 × 4

3 rows and 4 columns

⇒ 3 by 4 matrix

∴ Option (b) will be a 3-by-4 matrix is the correct option.