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 Author Comment/Response Sinval Santos 02/23/00 5:51pm Be the following expression: exp= ax+Sin[rx+1]-Cos[bx+a]; The coefficients of variable x are: {a , r, b}. I tried with several forms to collect these coefficients but I didn't get. d1=Depth[exp] 6 p1=Position[exp,x] {{1,2},{2,2,1,2,2},{3,1,2,2}} 01 - exp//Coefficient[#,x,p1]& {{a,0},{0,0,a,0,0},{0,a,0,0}} 02 - exp//Coefficient[#,x,d1]& 0 03 - exp//Map[Coefficient[#,x]&,#,p1]& Map[Coefficient[#1,x]&,a x-Cos[a+b x]+Sin[1+r x], {{1,2},{2,2,1,2,2},{3,1,2,2}} 04 - exp//Map[Coefficient[#,x]&,#,d1]& 0 I didn't get to collect the coefficients of x indicating the positions and the maximum level. I also used MapAt but I didn't get. In big expressions, to simplify, it is necessary to substitute the coefficients of some variable. How to do to collect the exp coefficients?. Sinval Santos URL: ,

 Subject (listing for 'Coefficients') Author Date Posted Coefficients Sinval Santos 02/23/00 5:51pm Re: Coefficients P.J. Hinton 02/24/00 4:57pm Re: Coefficients Aaron Honecker 02/24/00 4:59pm
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