How to Find the Determinant of a Matrix in MATLAB using for loop. i don't want to use the actual code.

How to Find the Determinant of a Matrix in MATLAB using for loop. i don't want to use the actual code.thanks

[Rik]

What exactly do you mean? And what did you try? Is this homework or is there another reason why the set function is not suitable?

[John D'Errico]

How is this not homework, and you are just asking someone to do your homework for you?

[maede mandi]

To understand the algorythm of determinant. That’s why det(matrix) is not useful for me.

[maede mandi]

I know the formula, and now just want to know how it works in a for loop for different matrices.

[Walter Roberson]

https://www.toppr.com/guides/maths/determinants/minors-and-cofactors-of-determinant/

[maede mandi]

Thanks, bust still I don’t get it how it’s work In a for loop in matlab.

Answer 1

[Walter Roberson]

if isscalar(YourArray) || isempty(YourArray)
  total = YourArray;
else
    total = 0;
    for R = 1 : number_of_rows
       for C = 1 : number_of_columns
          total = total + SomeValue * YourArray(R,C) * YourDeterminentFunction(YourArray with Row #R and Column #C crossed out)
       end
    end
end

SomeValue is +1 or -1 but you need to figure out which.

[maede mandi]

clc
close all

a=[1 2 3 ; 4 5 6 ; 7 8 9 ]

%size:number of rows & cloumns 
[m1, n1]=size(a);
%for loops
for i=1:m1
    % i run upto number of rows in x
    for j=1:n1
        %j run upto number of columns in x
        
        z(i,j)= (-1)^(1+i)* a [1,j] *... ??????????? 
            
        
    end
end   
disp('output matrix');
disp(z)

[Walter Roberson]

Use a recursive function.

z(i,j)

Determinents and cofactors are scalar. What is your reasoning for storing something there?

(There are reasons to want to store items as you go through, but I suspect your thoughts are about something else completely.)