Re: x=2;Composition[f,FindMinimum][x+1,{x,a}]
- To: mathgroup at smc.vnet.net
- Subject: [mg68302] Re: x=2;Composition[f,FindMinimum][x+1,{x,a}]
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Tue, 1 Aug 2006 06:59:15 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <eake8e$qu9$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Chris Chiasson wrote:
> The above command crashes my kernel on Windows XP and Linux. Anybody else?
>
x = 2; Composition[f, FindMinimum][x + 1, {x, a}]
The above one crashes the kernel too. Now, you would not get any result
whatsoever, since this is "a" that must be set, not "x".
x = 2; Composition[FindMinimum][x + 1, {x, a}]
FindMinimum::"srect" : "Value (a) in search specification ({x, a}) is
not a number or array of numbers.
FindMinimum[x + 1, {x, a}]
This works better,
a = 2; Composition[f, FindMinimum][x + 1, {x, a}]
FindMinimum::"lstol" : "The line search decreased the step size to
within tolerance specified by AccuracyGoal and PrecisionGoal but was
unable to find a sufficient decrease in the function. You may need more
than (MachinePrecision) digits of working precision to meet these
tolerances.
f[{-1.1012745173913992*^16, {x -> -1.1012745173913992*^16}}]
HTH,
Jean-Marc