Re: matrix of coefficents
- To: mathgroup at christensen.cybernetics.net
- Subject: Re: matrix of coefficents
- From: merx at ws02.pc.chemie.th-darmstadt.de (Hendrik Merx)
- Date: Tue, 25 Oct 94 13:55:35 +0100
Dear MathGroup ! wmm at chem.wayne.edu (Martin McClain) wrote: > If > varsN = a list of N variables, > and if > exprsN = a list of of N expressions, each one linear in the variables of > varsN, > > Is there some operator (that I haven't found yet), or some clever way to > use a nonobvious operator, to get the matrix of coefficients? You should try the Jacobian matrix which is the matrix of derivatives of all expressions to all variables. It's in the Mathematica book in the Tour through Mathematica, section 9. Programming ( p. 12 in the german edition): Jacobi[funs_List, vars_List] := Outer[D, funs, vars] Hope this helps Hendrik merx at pc.chemie.th-darmstadt.de