满意答案

ORTH Orthogonalization.

Q = ORTH(A) is an orthonormal basis for the range of A.

That is, Q'*Q = I, the columns of Q span the same space as

the columns of A, and the number of columns of Q is the

rank of A.

Class support for input A:

float: double, single

>> a1=[1;0;-1;0]

a1 =

1

0

-1

0

>> a2=[1;-1;0;1];

>> a3=[-1;1;1;0];

>> Q=orth([a1 a2 a3])

Q =

-0.6928 0.0587 -0.4280

0.5046 0.4078 -0.7609

0.4589 -0.6730 -0.0563

-0.2339 -0.6143 -0.4843

>> Q'*Q

ans =

1.0000 0 -0.0000

0 1.0000 0.0000

-0.0000 0.0000 1.0000

Q就是正交化后的矩阵，orth()是正交化函数

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