Master MATLAB
for Engineering

% Creating matrices
A = [1, 2, 3; 4, 5, 6; 7, 8, 9];  % 3x3 matrix
v = 1:10;                         % Vector [1, 2, ..., 10]
z = zeros(3, 3);                  % Matrix of zeros
I = eye(4);                       % 4x4 identity matrix

% Operations
B = A';           % Transpose
C = A * B;        % Matrix multiplication
D = A .* B;       % Element-wise multiplication

% Indexing
element = A(2, 3);     % Element from row 2, column 3
column = A(:, 2);      % Entire column 2
submatrix = A(1:2, :); % First 2 rows

% Sine and cosine function graph
x = 0:0.1:2*pi;
y1 = sin(x);
y2 = cos(x);

figure;
plot(x, y1, 'b-', 'LineWidth', 2);
hold on;
plot(x, y2, 'r--', 'LineWidth', 2);
hold off;

title('Trigonometric Functions');
xlabel('x (radians)');
ylabel('Amplitude');
legend('sin(x)', 'cos(x)');
grid on;