get number of rows in array in matlab

To get the number of rows in a 2D array in MATLAB, you can use the size function. The first output of the size function gives the number of rows. Here's an example code snippet:

main.m
A = [1 2 3; 4 5 6; 7 8 9];
num_rows = size(A, 1);
disp(num_rows); % displays 3
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In this example, the variable A is a 3x3 array. We use the size function with the argument A and the output index 1 to get the number of rows. The output is assigned to the variable num_rows, which is then displayed using the disp function. The output should be 3, which is the number of rows in the array.