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#### Solve Lagrange multiplier equations in MATLAB

```I would like to solve first simple example on
http://en.wikipedia.org/wiki/Lagrange_multipliers
in MATLAB, any idea how to input it in MATLAB using built in
optimization routines.
```
 0
faisalmufti (169)
1/25/2009 7:32:15 AM
comp.soft-sys.matlab 211266 articles. 19 followers. lunamoonmoon (257) is leader.

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```fas <faisalmufti@gmail.com> wrote in message <53904571-a932-4f62-af98-13e35cda25a1@p2g2000prf.googlegroups.com>...
> I would like to solve first simple example on
> http://en.wikipedia.org/wiki/Lagrange_multipliers
>  in MATLAB, any idea how to input it in MATLAB using built in
> optimization routines.

help fmincon

Bruno
```
 0
b.luong5955 (6401)
1/25/2009 8:07:08 AM
```On Jan 25, 8:07=A0pm, "Bruno Luong" <b.lu...@fogale.findmycountry>
wrote:
> fas <faisalmu...@gmail.com> wrote in message <53904571-a932-4f62-af98-13e=
> > I would like to solve first simple example on
> >http://en.wikipedia.org/wiki/Lagrange_multipliers
> > =A0in MATLAB, any idea how to input it in MATLAB using built in
> > optimization routines.
>
> help fmincon
>
> Bruno

Also isn't fmincon for constraints with upper and lower bounds ?. In
this case we only x^2+y^2-1=3D0 constraint. Also what about fsolve ?
Thanks,
```
 0
faisalmufti (169)
1/25/2009 11:40:55 PM
```fas <faisalmufti@gmail.com> wrote in message <744606c0-2bf4-4fb4-8812-f65bf841b39f@w1g2000prk.googlegroups.com>...

>

I could, but I risk not doing as well as the doc.

> Also isn't fmincon for constraints with upper and lower bounds ?.

Yes, optionally. Just give don't use it if you don't need it

>In
> this case we only x^2+y^2-1=3D0 constraint.

Look at 9th parameter (nonlcon).

I recommend reading the doc. All is there.

Bruno
```
 0
b.luong5955 (6401)
1/26/2009 6:41:12 AM
```fas <faisalmufti@gmail.com> wrote in message <53904571-a932-4f62-af98-13e35cda25a1@p2g2000prf.googlegroups.com>...
> I would like to solve first simple example on
> http://en.wikipedia.org/wiki/Lagrange_multipliers

See Using Lagrange multipliers in optimization, here, for worked MATLAB example of the first Wikipedia example:

http://matlab.cheme.cmu.edu/2011/12/24/using-lagrange-multipliers-in-optimization/

/eric
```
 0
Eric
9/24/2015 4:05:03 PM

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