Index exceeds matrix dimensions det

D is matrix right? why det(D) not work someone help me

Answer 1

[Ahmos Sansom]

Check the condition cond(A) or try 1/det(A):

Read:

https://se.mathworks.com/help/matlab/ref/det.html

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Or Wiki!

Answer 2

[Jan]

You have provided very few information, such that the readers have to guess. My idea:

You have defined "det" as a variable before:

X = randi([1, 100], [3, 3]);
det(X);
...
det = ones(2, 2);
det(X)   % Indices out of range

Check this by typing into the command window:

dbstop if error

Then run the code again and when it stops, check what "det" is:

which det -all

If this is the problem, the solution is easy: Do not shadow built-in functions by local variables.