Documentation of samfun
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[ObjV, Grad] = samfun(x, DistDataHigh)
Objective function for Sammon mapping, calculates derivatives as well
This function calculates the objective values (stress function)
for Sammon mapping.
If a second output parameter is provided, the derivatives are
calculated as well.
This function is normally called from the optimization function.
Syntax: [ObjV, Grad] = samfun(x, DistDataHigh)
x - data points, every row presents one low-dimensional data point
DistDataHigh - distances betwenn data points in high dimension
ObjV - objective value
See also: sammon
This document is part of version 3.8
GEATbx: Genetic and Evolutionary Algorithm Toolbox for use with Matlab -
The Genetic and Evolutionary Algorithm Toolbox is not public domain
© 1994-2006 Hartmut Pohlheim, All Rights Reserved,