How do I construct this function?

Question

Riyaz Bhayat 2020-1-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500628-how-do-i-construct-this-function

评论： Steven Lord 2020-1-16

I am in need of some help regarding this question,

Write a function Matrix Count(matrix) that has as input a matrix and has as output a string If the matrix is not square, the output string is 'this is not a square matrix'. If the matrix is square, the output string is 'this matrix has determinant ??'

Any guidance would be very much appreciated

Thanks

2 个评论
显示无隐藏无

Spencer Chen 2020-1-16

Do you know how to check the size of a matrix?

Steven Lord 2020-1-16

This sounds like a homework assignment. If it is, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.

If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the MATLAB Onramp tutorial (https://www.mathworks.com/support/learn-with-matlab-tutorials.html) to quickly learn the essentials of MATLAB.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Allen 2020-1-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/500628-how-do-i-construct-this-function#answer_410467

在 MATLAB Online 中打开

The following should accomplish what you are asking.

function TF = issquare(A)
% Verifies that A is a numerical matrix with more that one element (ie - scalar).
if isnumeric(A) && ismatrix(A) && numel(A)>1
    % Get the size (rows & columns) of A
    sz = size(A); % sz(1)==# of rows  and  sz(2)==# of columns
    if isequal(sz(1),sz(2))
        TF = 'this matrix has determinant';
        % Would recommend making TF a boolean instead of a message (ie - true/false)
        % TF = true;
    else
        TF = 'this is not a square matrix'
        % Would recommend making TF a boolean instead of a message (ie - true/false)
        % TF = false;
    end
else % Input is either a scalar value, non-numeric, and/or is not a matrix.
    error('Invalid Input: Must be a numerical, non-scalar, matrix.')
end
end