I want to get vector of det
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-my code-
a=[1 0 0 0]; b=[0 1 0 0]; c=[0 0 1 0]; d=[0 0 0 1];
detvector=det([a b c d]);
-I want to get detvector=[det([a(1) b(1) c(1) d(1)]),det([a(2) b(2) c(2) d(2)]),det([a(3) b(3) c(3) d(3)]),det([a(4) b(4) c(4) d(4)])]. But my code doesn't works. How can I solve it?
1 Comment
Jan
on 28 Jul 2013
Edited: Jan
on 28 Jul 2013
Please follow the "? Help" link to learn how to format code in the forum. Thanks.
Instead of posting "my code does not work", an explicit description would be more useful: Post the code and a copy of the error message, or explain the difference between your expectations and the results.
Accepted Answer
Roger Stafford
on 28 Jul 2013
If you express the matrix properly as a 4 x 4 matrix,
det([a;b;c;d]),
matlab will give you its determinant. Your expression
[a b c d]
is that of a 1 x 16 row vector and it is meaningless to speak of its "determinant".
However, you don't need matlab to find the determinant you apparently have in mind. Of the twenty-four products that comprise this determinant, only one is non-zero and that will be the product of the four 1's, giving you a resultant determinant value of 1.
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