# optimsimplex.computefv: Computation of Function Value(s) In optimsimplex: R Port of the 'Scilab' Optimsimplex Module

## Description

These functions compute the value of the function at the vertices points stored in the current simplex object and stored them back into the simplex object. `optimsimplex.computefv` determines how many vertices are stored in the simplex object and delegates the calculation of the function values to `optimsimplex.compsomefv`.

## Usage

 ```1 2``` ``` optimsimplex.computefv(this = NULL, fun = NULL, data = NULL) optimsimplex.compsomefv(this = NULL, fun = NULL, indices = NULL, data = NULL) ```

## Arguments

`this`

The current simplex object, containing the nbve x n matrix of vertice coordinates (i.e. `x` element), where n is the dimension of the space and nbve the number of vertices.

`fun`

The function to compute at vertices. The function is expected to have the following input and output arguments:

 myfunction <- function(x, this){ ... return(list(f=f,this=this)) }

where x is a row vector and this a user-defined data, i.e. the `data` argument.

`data`

A user-defined data passed to the function. If data is provided, it is passed to the callback function both as an input and output argument. `data` may be used if the function uses some additionnal parameters. It is returned as an output parameter because the function may modify the data while computing the function value. This feature may be used, for example, to count the number of times that the function has been called.

`indices`

A vector of increasing integers from 1 to nbve.

## Value

`optimsimplex.computefv` and `optimsimplex.compsomefv` return a list with the following elements:

this

The updated simplex object.

data

The updated user-defined data.

## Author(s)

Author of Scilab optimsimplex module: Michael Baudin (INRIA - Digiteo)

Author of R adaptation: Sebastien Bihorel ([email protected])

## See Also

`optimsimplex`

optimsimplex documentation built on Feb. 14, 2018, 1:04 a.m.