Re: FindRoot with a vector of unknowns

*To*: mathgroup at smc.vnet.net*Subject*: [mg125095] Re: FindRoot with a vector of unknowns*From*: Ray Koopman <koopman at sfu.ca>*Date*: Tue, 21 Feb 2012 06:13:45 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <jhqmed$f70$1@smc.vnet.net>

On Feb 19, 3:29 am, Sam Takoy <sam.ta... at yahoo.com> 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 I usually use different symbols for the vector and its elements. In[1]:= Clear[x]; X = Array[x,3]; FindRoot[X - {1,2,3} == {0,0,0}, Thread@{X,1}] Out[2]= {x[1] -> 1., x[2] -> 2., x[3] -> 3.}