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Re: how to calculate derivative of vector functions
Posted:
Nov 23, 2012 4:25 PM


On 11/23/2012 11:08 AM, mdeng1985@gmail.com wrote: > Hi, If R'=v > How to calculate derivative of > F=(R+b)/norm(R+b) in Mathematica where b is a constant vector > How to get the vector form of F' > > Thanks a lot > Li >
You mean something like this (in 2D space)
 r = {Cos[t], Sin[t]}; b = {1, 2}; f = (r + b)/Norm[r + b]; D[f, t] 
ps. it is not good idea to use single UpperCase variables in Mathematica. Also, variable names and functions names should start with lowerCase letters.
Nasser



