Chapter 3 11 11. Derivative of row vector function (X) 0(X)=[9(X),(X),…,0(X] 80 0p2 a中n x1 Ox1 O o(X) op 042 a中n OX 0x2 0x2 0x2 oo a4, op 0Xm xm Example:If X =[x.x]then OX OXT c⊙y -=I where I is a identity matrix.11. Derivative of row vector function φ ( X ) [ ( ) , ( ) , , ( ) ]  ( X )   1 X  2 X   n X m m n n m m n n x x x x x x x x x                                                     ... ... ... ... ... ... ... 1 2 2 2 2 2 1 1 1 2 1 1 X (X) Example: If then T m [ x , x , , x ] X  1 2  I X X X X       T where I is a identity matrix. Chapter 3 11