Nbcomp=floor(long/(2*dpas)+0.5);
xn=input("Voulez-vous modifier les éléments de compensations si oui tapé 1 sinon 0")
if xn==1  then
    for ca=0:Nbcomp
    pas_pr1=(long-2*dpas)/(Nbcomp-1)

m = ones(Nbcomp,2)
    m1= m.*pas_pr1
   // m1=m*m2

end
elseif xn==0 then pas_pr=(long-2*dpas)/(Nbcomp-1);
end