Re: FindRoot with a vector of unknowns

*To*: mathgroup at smc.vnet.net*Subject*: [mg125069] Re: FindRoot with a vector of unknowns*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Mon, 20 Feb 2012 02:50:12 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201202191128.GAA15560@smc.vnet.net>*Reply-to*: murray at math.umass.edu

Assuming, as you have indicated, that you want to solve several given equations separately for the _same_ variable, the following will work (although I'm not sure how "elegant" it is): eqns = Thread[x - {1, 2, 3} == {0, 0, 0}]; starts = {1, 1, 1}; MapThread[FindRoot, {eqns, List[x, #] & /@ starts}] On 2/19/12 6:28 AM, Sam Takoy wrote: > Hi, > > Is there an elegant way to implement what I am trying to do here, that > is solve for a vector of unknowns: > > FindRoot[x - {1, 2, 3} == {0, 0, 0}, {x, {1, 1, 1}}] > > I can do this writing a loop, but hoping for a "vectorized" solution. > > Thanks, > > Sam > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**FindRoot with a vector of unknowns***From:*Sam Takoy <sam.takoy@yahoo.com>