NARVAL_F_Delet removes the first occurence of the value val inside the vector v.
Examples
v=[1234567];//original vectorval1=3;//value under considerationv1=NARVAL_F_Delet(v,val1);//application of NARVAL_F_Deletval2=6;//value under considerationv2=NARVAL_F_Delet(v,val2);//application of NARVAL_F_Deletvval1v1val2v2