how to make Matrix

Question

Ahmad Othman 2022-5-15

回答： Pratik Pawar 2022-5-19

Hi I have a problem Creating a function A, which reads a matrix A and prints the following

information on the screen: where the number of rows and columns in A will appear, the element of

row 2 column 1.

Dyuman Joshi 2022-5-15

Your statement is quite confusing. Can you show an example?

Answer 1

Pratik Pawar 2022-5-19

You can use the 'size' function to get the dimensions of the matrix and the 'fprintf' function to display the results.

MATLAB has indexing beginning from 1 instead of 0. The matrix elements can be accessed using two parameters

So, A(2, 1) will return the element at row 2, column 1

Please refer to the following code:

% script_name.m

A = [1 2 3 4; 5 6 7 8; 9 10 11 12];

showInfo(A);

function showInfo(A)

[row, col] = size(A);

fprintf('Number of rows: %d\n', row);

fprintf('Number of columns: %d\n', col);

fprintf('Element at (2, 1): %d\n', A(2, 1));

end