clc;
y = input('Please Enter the size of the equation system n = ');
C = input('Please Enter the elements of the Matrix C ');
b = input('Please Enter the elements of the Matrix b ');

dett = det(C);

if dett == 0
    disp('This system is unsolvable because det(C) = 0 ')
else
    b = b';
    a = [C b];

    % Gauss elimination method
    [m, n] = size(a);

    for j = 1:m-1
        for z = j+1:m
            if a(j,j) == 0
                t = a(j,:);
                a(j,:) = a(z,:);
                a(z,:) = t;
            end
        end
        for i = j+1:m
            a(i,:) = a(i,:) - a(j,:) * (a(i,j) / a(j,j));
        end
    end

    x = zeros(1, m);
    for s = m:-1:1
        c = 0;
        for k = s+1:m
            c = c + a(s,k) * x(k);
        end
        x(s) = (a(s,n) - c) / a(s,s);
    end

    disp('Gauss elimination method:');
    disp('Matrix A after elimination:');
    disp(a(:,1:end-1));
    disp('Solution vector:');
    disp(x);
end

Octave online compiler

Write, Run & Share Octave code online using OneCompiler’s Octave online compiler for free. It’s a simple and powerful platform to practice numerical computations and matrix operations using GNU Octave right from your browser.

About Octave

GNU Octave is an open-source high-level programming language primarily intended for numerical computations. It is mostly compatible with MATLAB, and it's commonly used for linear algebra, numerical analysis, signal processing, and other scientific computing tasks.

Sample Code

The following is a simple Octave program that prints a greeting:

printf("Hello, OneCompiler!\n");

Taking inputs (stdin)

OneCompiler’s Octave editor supports stdin through the I/O tab. Here's an example of reading input from the user:

name = input("Enter your name: ", "s");
printf("Hello, %s!\n", name);

Syntax Basics

Variables

a = 10;
b = 3.14;
name = "Octave";

Vectors and Matrices

v = [1, 2, 3];
M = [1, 2; 3, 4];

Arithmetic

OperationSyntax
Add+
Subtract-
Multiply*
Divide/
Element-wise.*, ./

Conditionals

x = 10;
if x > 5
    disp("x is greater than 5");
else
    disp("x is 5 or less");
end

Loops

For loop

for i = 1:5
    disp(i);
end

While loop

i = 1;
while i <= 5
    disp(i);
    i = i + 1;
end

Functions

function y = square(x)
    y = x ^ 2;
end

result = square(4);
printf("Square: %d\n", result);

This guide provides a quick reference to Octave programming syntax and features. Start writing Octave code using OneCompiler’s Octave online compiler today!