Re: How to get the output of Minimize function in x = a format

*To*: mathgroup at smc.vnet.net*Subject*: [mg68534] Re: How to get the output of Minimize function in x = a format*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Wed, 9 Aug 2006 04:18:56 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 8/8/06 at 6:28 AM, erkuts at gmail.com (erkutsonmez) wrote: >Say that,I have the following minimization problem >Minimize[x^2 - 3x + 6, x] >which gives me the x value that minimizes the expression in the >format of >{x -> 3\2}. This can be done as follows: In[7]:= x=(x/.Last@Minimize[x^2-3x,x]); x Out[8]= 3/2 But it is worth noting there are advantages to keeping the solution in the form returned by Minimize. Once x is assigned a value, any future expression with x in it will have x evaluated to that value. If you were to do another minimization problem following this assignment, it would not work unless you either cleared the value of x or used the Minimize function inside a Block, i.e., In[9]:= Minimize[2 x^2+3,x] returns an error message and Out[9]= Minimize[15/2, 3/2] And when the solution is in the form {x->3/2}, any expression with x can be evaluated with x=3/2 by simply using ReplaceAll (/.) I.e. In[10]:= Clear[x]; sol=Last@Minimize[x^2-3 x,x]; 2 x^2+3/.sol Out[12]= 15/2 In[13]:= 1/x/.sol Out[13]= 2/3 -- To reply via email subtract one hundred and four