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!