Index exceeds matrix dimensions det

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An Chan
An Chan 2017-12-14
编辑： Jan 2017-12-14
D is matrix right? why det(D) not work someone help me

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回答（2 个）

Ahmos Sansom
Ahmos Sansom 2017-12-14
Check the condition cond(A) or try 1/det(A):
Read:
https://se.mathworks.com/help/matlab/ref/det.html
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Jan
Jan 2017-12-14
编辑：Jan 2017-12-14
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.

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