Code covered by the BSD License

# Rosin-Rammler Diagram plotting tool

### Ivan Brezani (view profile)

25 Jun 2010 (Updated )

This tool plots the Rosin-Rammler Diagram (RRSB) and calculates various related parameters.

perturb(x,l,u,del,y,sigma)
```function[pert,x,y] = perturb(x,l,u,del,y,sigma)
%PERTURB Perturb point from bounds
%
%   [PERT,X] = PERTURB(X,L,U,DEL) perturbs the current point X
%   slightly to shake it loose from tight (less than DEL away)
%   bounds U and L to be strictly feasible.
%   Called by SNLS and SFMINBX.
%
%   [PERT,X,Y] = PERTURB(X,L,U,DEL,Y,SIGMA) also perturbs the
%   reflected point Y with respect to SIGMA,

%   Copyright 1990-2006 The MathWorks, Inc.
%   \$Revision: 1.1.6.1 \$  \$Date: 2009/07/06 20:46:10 \$

if nargin < 4
del = 100*eps;
end

if (min(abs(u-x)) < del) | (min(abs(x-l)) < del)
upperi = (u-x) < del;
loweri = (x-l) < del;
x(upperi) = x(upperi) - del;
x(loweri) = x(loweri) + del;
if nargin > 4
y(upperi) = y(upperi) - del*sigma(upperi);
y(loweri) = y(loweri) + del*sigma(loweri);
end
pert = 1;
else
pert = 0;
end

```