how to write a 3x3 matrix in matlab

To create a 3x3 matrix in MATLAB, you can use the following code:

main.m
A = [1 2 3; 4 5 6; 7 8 9];
27 chars
2 lines

This code creates a 3x3 matrix named A with the values 1-9 in row-major order. The semicolons denote a new row.

You can also create a 3x3 matrix of zeros using the zeros function:

main.m
B = zeros(3);
14 chars
2 lines

Or a 3x3 identity matrix using the eye function:

main.m
C = eye(3);
12 chars
2 lines

And you can access the elements of the matrix using indexing:

main.m
A(2,3) % returns the value in the second row, third column (6 in this case)
76 chars
2 lines