Re: [Q] symbolic SVD?

*To*: mathgroup at smc.vnet.net*Subject*: [mg26840] Re: [Q] symbolic SVD?*From*: "Paul Lutus" <nospam at nosite.com>*Date*: Thu, 25 Jan 2001 01:13:19 -0500 (EST)*References*: <94m9jq$3o7@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

"James" <research at proton.csl.uiuc.edu> wrote in message news:94m9jq$3o7 at smc.vnet.net... > > > Sorry about reposting. > I've not received any reply yet, > and I tried several ways, but I couldn't get a clue, either. > So if anyone can help, that would be appreciated. > > ------------------------------------------------------------- > > I've used 'symbolic' calculation in mathematica in many ways, > but this time, > I wonder if mathematica can solve symbolic matrix operation. > Specifically, > > m = {{a, b}, > {c, d}, > {e, f}} > > SingluarValues[m] > > returns > > SingularValues::"svdf": "SingularValues has received a matrix > with infinite precision." > > (a,b,c,d,e,f are all symbolics.) > I need to do several symbolic matrix operations such as SingularValues. > Is there any way to do that? The values in the matrix must not be undefined variables, or variables with infinite precision. Try: m = {{1.,2.}, {3.,4.}, {5.,6.}} SingularValues[m] "SingularValues[m] gives the singular value decomposition for a numerical matrix m. " Note the word "numerical." -- Paul Lutus www.arachnoid.com