Re: reuse values maximize

*To*: mathgroup at smc.vnet.net*Subject*: [mg51991] Re: reuse values maximize*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Sat, 6 Nov 2004 02:08:28 -0500 (EST)*References*: <cmfbkc$7eh$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Arne wrote: > Sorry, very simple question, but I really can't work it out... > > I want to use the output of a maximation for further calculations. > something like: > > z[y_]=-y^2+y > a=Maximize[z,{y}] > b=Extract[a,1] > > Now mathematica returns {y -> -0.5}. > > I want to assign the value of -0.5 to a new variable. So far I haven't > worked out how to do this (besides copy and paste!). > > Thanks for any comment. > Let us say you have the expression {y->-0.5} in a variable ans, then you could extract the value into another variable with: othervar= y/.ans What happens here is that the expression y/.ans means y with the substitutions contained in ans applied - which boils down to -0.5. Regards, David Bailey