Re: how to calculate hessian matrix

[Tomas Dome]

yes, i have the analytic _expression_ by a variable. i mean my function is like:

function H = hessianMatrix(fx,x0)

 ... 

its ok? 

2013/2/19 Juan Pablo Carbajal <address@hidden>

On Tue, Feb 19, 2013 at 5:09 PM, tomasdome <address@hidden> wrote:
> hi, i'm trying to calculate the hessian matrix of a multivariable function
> (f(x,y,z,r) for example),
>
> how i can do it?
>
> i'm trying to make him with 2 for statements and the function "diff" but i
> think "diff" only accepts univariable functions like f(x).
>
> sorry , i'm a newbie in Octave
>
> thanks! :)
>
>
>
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1. Do you have an analytic _expression_ for f(·)?
2. If not, do you have a set of known values for f(·)? Where was the
function evaluated to get those values?