MathGroup Archive 1998

[Date Index] [Thread Index] [Author Index]

Search the Archive

Differentiation ?


Hi,

I saw this equation in a book (Sum => greek SIGMA)

        Sum ei^2 = Sum (yi^2 - 2 mu yi + mu^2)

That easy to implement but there's this one

        D[ Sum ei^2, mu] = 2 Sum yi - 2 n mu

and this one to

        E'E = Y'Y - B'X'Y + B'X'XB

        D[E'E,B] = -2 X'Y + 2X'XB

the ' mean Transpose[]

How can I implement these type of Differenciation ?  Is it possible to
do that in Mathematica ?

Thanks
Yves






  • Prev by Date: Re: Use of the command Display, with ImageResolution
  • Next by Date: Vector Transposition
  • Previous by thread: Re: Use of the command Display, with ImageResolution
  • Next by thread: Re: Differentiation ?