Re: Collect coefficients of array variables during

*To*: mathgroup at smc.vnet.net*Subject*: [mg87013] Re: [mg86971] Collect coefficients of array variables during*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sat, 29 Mar 2008 04:21:56 -0500 (EST)*Reply-to*: hanlonr at cox.net

Off[Part::partd, Part::pspec]; eqn1 = 10. A[[1, 1]] + b A[[1, 1]] + c A[[1, 2]] + 3. A[[1, 2]]; eqn1 // Simplify (b+10.) A[[1,1]]+(c+3.) A[[1,2]] If Simplify doesn't work try FullSimplify or hit it with a hammer: Collect[eqn1, Union[Cases[eqn1, A[[__]], Infinity]]] (b+10.) A[[1,1]]+(c+3.) A[[1,2]] Bob Hanlon ---- Gopinath Venkatesan <gopinathv at ou.edu> wrote: > Hello Mathematica Friends > > If we have an array variable, and assuming after intermediate calculations, some equations are found to be below. > > eqn1=10. A[[1,1]]+b A[[1,1]]+c A[[1,2]]+3. A[[1,2]] (only for illustration) > > Simplify[] does not combine the coefficients under same array member, i.e. instead of (10.+b)A[[1,1]]+(c+3.)A[[1,2]], it is showing the earlier mentioned form. > > Is there a way to collect them and simplify them. But when I checked for simple cases, Simplify[] seems to work. > > Thanks for the suggestions. > > Regards, > Gopinath > University of Oklahoma >