Mastering MATLAB Concepts

How do you create a 3x3 matrix in MATLAB?

• A = [1 2; 3 4; 5 6];

• A = [1, 2, 3; 4, 5, 6; 7, 8, 9];

• A = [1 2 3; 4 5 6; 7 8 9];

• A = [1 2 3 4; 5 6 7 8; 9 10 11 12];

What function would you use to plot a sine wave in MATLAB?

• draw(x, sin(x))

• plot(x, sin(x))

• plot(sin(x), x)

• graph(x, sin(x))

Explain how to access the second element of a vector in MATLAB.

• v(1)

• v(2)

• v[2]

• v.get(2)

What is the purpose of the 'function' keyword in MATLAB?

• The 'function' keyword is used to import libraries in MATLAB.

• The 'function' keyword is used to create a variable in MATLAB.

• The 'function' keyword is used to execute a script in MATLAB.

• The 'function' keyword is used to define a new function in MATLAB.

How can you create a matrix filled with zeros in MATLAB?

• empty(3,3)

• rand(3,3)

• zeros(3,3)

• ones(3,3)

Describe how to label the axes of a plot in MATLAB.

• Label the axes by using axis_label('X', 'Y').

• Apply xlabel('Axis X') and ylabel('Axis Y') for labeling.

• Use xlabel('X-axis Label') and ylabel('Y-axis Label') to label the axes in MATLAB.

• Use set_xlabel('X-axis') and set_ylabel('Y-axis') to label the axes.

What command is used to clear all variables from the workspace in MATLAB?

• remove all

• delete

• reset workspace

• clear

How do you concatenate two matrices vertically in MATLAB?

• C = vertcat(A, B);

• C = [A; B];

• C = [A B];

• C = A + B;

What is the difference between a row vector and a column vector in MATLAB?

• Both row and column vectors have the same dimensions in MATLAB.

• A row vector can only contain numeric values, while a column vector can contain any data type.

• A row vector has multiple rows and one column, while a column vector has one row and multiple columns.

• A row vector has one row and multiple columns, while a column vector has multiple rows and one column.

What happens if we don’t assign a variable to an expression which evaluates a numerical value?

• MATLAB shows error

• values are assigned to a variable ans automatically

• Depends on the numerical value

• Nothing happens