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addnoisef
Add noise to vector/scalar fields

Description
FF = addnoisef(F) adds 10% white noise to the vector/scalar field(s) F. 
 
FF = addnoisef(F, EPS) specifies that the standard deviation of the 
white noise is EPS times that of the field(s) F (EPS=0.1 by default). 
 
FF = addnoisef(F, EPS, OPT) specifies whether the noise is additive 
(OPT='add', by default) or multiplicative (OPT='mul'). 
 
FF = addnoisef(F, EPS, OPT, N) first filters the noise at scale N (in 
mesh units) with gaussmat before adding/multiplying it to the field(s) 
F. 
 
Example:  showvec(addnoisef(loadset)); 
 
F. Moisy 
Revision: 1.0,  Date: 2005/10/29. 
 
See Also
operf, randvec, gaussmat. 

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