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path: root/cesar/cp2/spoc/test/ApproxOrder1ParamMCoeff.sci
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function [arg_i, arg_e, sinc_i, sinc_e, div, ordo, pente] = ApproxOrder1ParamMCoeff(rho,X0,N,Coeff_number)

if Coeff_number<0
    xi=X0 - Coeff_number;
    xe=N-1;
    qi= X0-Coeff_number;
    qe=N-1;
    ki=X0+ 0;
    ke=N+Coeff_number-1;
elseif Coeff_number>0
    xi=X0;
    xe=(N-1)-abs(Coeff_number);
    qi=X0+ 0;
    qe=N-Coeff_number-1;
    ki=X0+ Coeff_number;
    ke=N-1;
else
    xi=X0;
    xe=(N-1)-abs(Coeff_number);
    qi=X0;
    qe=N-1;
    ki=X0;
    ke=N-1;
end
xi;
xe;
arg_i = %pi*(ki*(1+rho)-qi);
arg_e = %pi*(ke*(1+rho) - qe);
sinc_i=sinc( arg_i);
sinc_e=sinc( arg_e);
div = xe-xi;
pente=(sinc_e-sinc_i)/(xe-xi);
//pente=(sinc_e-sinc_i);
ordo=sinc_i;
 
endfunction