find x in ax=b in matlab

To find the value of x in the equation ax = b, you can use the backslash operator \ in MATLAB. This operator performs matrix left division and can solve systems of linear equations like ax = b.

Here's an example of how to use the backslash operator to solve for x:

main.m
% Define the values of a and b
a = [1 2; 3 4];   % coefficient matrix
b = [5; 6];       % constant vector

% Solve for x
x = a \ b;

% Display the result
disp(x);
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In this example, the coefficient matrix a is a 2x2 matrix and the constant vector b is a 2x1 matrix. The backslash operator \ performs the matrix left division operation and solves for x. The result x will be a 2x1 matrix, which contains the solution to the equation ax = b.

Please make sure that the dimensions of a and b are compatible for matrix left division. If a is not square or it is singular (non-invertible), the backslash operator may not produce a unique solution.