i have problem in result return from cvdet() function

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int A[]={1,2,3,4};
	
	CvMat *src=cvCreateMat(2,2,CV_64FC1);
	src->data.i=A;
	

	cout<< cvDet(src)<<endl; //must be return -2 ,but the result show in screen is 3.92822e-252

Posted 24-Sep-13 12:33pm

Anderso0on

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User 59241 · Accepted Answer · 2013-09-24T20:10:00

Here is declaration for cvDet in header:

C++

double cvDet(const CvArr* mat);

It should give a clue.

Here is documentation for cvDet - another clue.

Returns the determinant of a square floating-point matrix.

Try this:

C++

double A[]={1,2,3,4};

CvMat *srcA=cvCreateMat(2, 2, CV_64FC1);
srcA->data.db = A;
cout << cvDet(srcA) << endl;