BzzVector variables

BzzVector xO is the initial guess dimensioned as the number of all the variables of the system. 

The values of the variable 1 and its first and second derivatives at the support points s are collected in BzzVector syl, BzzVector sdlyl, BzzVector sd2yl. With these values known, it is very simple to write the equations of the residuals for this kind of variable. 

BzzVector f 0 is the value of the functions f(xo)- This vector is dimensioned as the number of equations and must be equal to or smaller than the number of variables, xO. 

The files needed are opened or created. The data coming from Matlab are stored into BzzVector variables so that they can be used with the BzzNonL 1-nearSystem class  

It is possible to modify the default values of such tolerances using the functions SetTo lAbs and SetTo IRe T which accept as their argument both a single value for all the variables and a BzzVector to assign a special tolerance to each variable  

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