create any size matrix by inputs in matlab

To create a matrix of any size based on user inputs in MATLAB, you can use the input function to prompt the user for the desired dimensions and then create the matrix using those inputs.

Here's an example:

main.m
% Prompt the user for the number of rows and columns
numRows = input('Enter the number of rows: ');
numCols = input('Enter the number of columns: ');

% Create the matrix based on user inputs
matrix = zeros(numRows, numCols);

% Prompt the user to enter the matrix elements
fprintf('Enter the matrix elements:\n');
for row = 1:numRows
    for col = 1:numCols
        matrix(row, col) = input(sprintf('Element at (%d, %d): ', row, col));
    end
end

% Display the created matrix
disp('Created matrix:');
disp(matrix);
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In this example, the user is first prompted to enter the number of rows and columns for the matrix. Then, a matrix of zeros of the specified size is created. The user is then prompted to enter the elements of the matrix row by row, and the matrix is filled accordingly. Finally, the created matrix is displayed.

You can modify the code as per your specific needs, such as using different data types or initializing the matrix with different values.

Note: Make sure to handle user inputs properly, such as checking for valid input and error handling.