QR factorization and Calculation of partial derivatives of Q

[qishengjie9]

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Hello，I have a question about QR and calculation of partial derivatives. Say I have a input A(x), it is a m×n matrix and x={x1,x2,x3,...xn} is argument. Q is the orthonormal basis of the A(x), namely [Q, R] = qr(A). Now the analytical expression of A and its partial derivatives is available. and I wonder if I can get the partial derivative of Q. Thanks for your help!

[martinResearch]

The qr function has not been implemented yet. Maybe this could help to add its implementation. I don't have much time to this, but a contribution would be very welcome!