Name

defaultcoef — finds default coefficients in equations

CALLING SEQUENCE

coef=defaultcoef(defaultname,speccarb,speccara,arg1,…,argn)

PARAMETERS

Input

• defaultname = a string (default prefix of the coefficients)

• speccarb = the characters that must be before a coefficient to be sure that defaultname is not part of the name of another object

• speccara = the characters that must be after a coefficient to be sure that defaultname is not part of the name of another object

• argi = a string representing the text of an equation

Output

• coef=a (nx1) vector of coefficients names

DESCRIPTION

Determines the list of default coefs names in a set of equations

EXAMPLE


1) defaultcoef('co',['=' ; '+' ; '(' ; '-' ; '*'],['+' ; '-' ; '*' ; '/' ; ')'],'y=co1+co2*x1+(co3-co2)*x2')  

2) grocer_namecoef=defaultcoef('a',grocer_speccarb,grocer_speccara,varargin(:))

In example1, the coefficients are prefixed by co; they are asumed to be preceded by '=', '+', '(', '-' or '*' 

and followed by '+', '-', '*', '/', or ')'; the equation is 'y=co1+co2*x1+(co3-co2)*x2'.

The result is:

!co1   !

!         !

!co2   !

!         !

!co3   !

 

Example 2 is taken from function sur. 



               

AUTHOR

Eric Dubois 2002