Points sampled by FindMinimum
- To: mathgroup at smc.vnet.net
- Subject: [mg71085] Points sampled by FindMinimum
- From: "Andrew Moylan" <andrew.j.moylan at gmail.com>
- Date: Wed, 8 Nov 2006 06:06:02 -0500 (EST)
Hi all,
Please consider the following code, which asks FindMinimum to minimise
a simple parabolic function while tracking at which which points
FindMinimum evaluates the function:
func[x_?NumericQ] := (Print[x]; 1 + (x - 1)^2)
FindMinimum[func[x], {x, 0.1}]
The output is:
0.1
0.1
0.1
0.6
0.6
0.6
1.
1.
1.
1.
1.
1.
But I would have expected output more like:
0.1
0.6
1.
1.
Can anyone explain why FindMinimum evaluates func three times at each
test point, instead of once?
Cheers,
Andrew