Prolog remove parenthesis when transforming list in polynomial
Basically when I try to transform a list into a polynomial or vice-versa, it always shows up with parenthesis (in case of the polynomials). Here is the code, the function not working is the poly2list, the other one are just to define what a monomial/polinomial is.
pvars([x,y,z]).
pvar(X):-pvars(V),member(X,V).
polinomial(X) :- monomial(X).
polinomial(P+M) :- monomial(M), polinomial(P).
monomial(X) :- pvar(X).
monomial(N) :- number(N).
monomial(X) :- power(X),!.
monomial(K*X) :- coefficient(K), power(X),!.
coefficient(N) :- number(N).
power(X) :- pvar(X),!.
power(X^Y) :- pvar(X), integer(Y), Y>1,!.
poly2list(X,[X]) :- monomial(X),!.
poly2list(X+P,[X|Y]) :- monomial(X), poly2list(P,Y).
For example, when i ask:
poly2list(X,[2*x^2,3,y]).
The result is:
X = 2*x^2+(3+y)
And I'm trying to get:
X = 2*x^2+3+y
Thanks in advance :)
prolog
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
add a comment |
Basically when I try to transform a list into a polynomial or vice-versa, it always shows up with parenthesis (in case of the polynomials). Here is the code, the function not working is the poly2list, the other one are just to define what a monomial/polinomial is.
pvars([x,y,z]).
pvar(X):-pvars(V),member(X,V).
polinomial(X) :- monomial(X).
polinomial(P+M) :- monomial(M), polinomial(P).
monomial(X) :- pvar(X).
monomial(N) :- number(N).
monomial(X) :- power(X),!.
monomial(K*X) :- coefficient(K), power(X),!.
coefficient(N) :- number(N).
power(X) :- pvar(X),!.
power(X^Y) :- pvar(X), integer(Y), Y>1,!.
poly2list(X,[X]) :- monomial(X),!.
poly2list(X+P,[X|Y]) :- monomial(X), poly2list(P,Y).
For example, when i ask:
poly2list(X,[2*x^2,3,y]).
The result is:
X = 2*x^2+(3+y)
And I'm trying to get:
X = 2*x^2+3+y
Thanks in advance :)
prolog
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
Make a left recursive expression.
– Willem Van Onsem
Nov 12 '18 at 17:56
Thank you, i managed to do it.
– Tiago Ferrero
Nov 13 '18 at 10:41
add a comment |
Basically when I try to transform a list into a polynomial or vice-versa, it always shows up with parenthesis (in case of the polynomials). Here is the code, the function not working is the poly2list, the other one are just to define what a monomial/polinomial is.
pvars([x,y,z]).
pvar(X):-pvars(V),member(X,V).
polinomial(X) :- monomial(X).
polinomial(P+M) :- monomial(M), polinomial(P).
monomial(X) :- pvar(X).
monomial(N) :- number(N).
monomial(X) :- power(X),!.
monomial(K*X) :- coefficient(K), power(X),!.
coefficient(N) :- number(N).
power(X) :- pvar(X),!.
power(X^Y) :- pvar(X), integer(Y), Y>1,!.
poly2list(X,[X]) :- monomial(X),!.
poly2list(X+P,[X|Y]) :- monomial(X), poly2list(P,Y).
For example, when i ask:
poly2list(X,[2*x^2,3,y]).
The result is:
X = 2*x^2+(3+y)
And I'm trying to get:
X = 2*x^2+3+y
Thanks in advance :)
prolog
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
Basically when I try to transform a list into a polynomial or vice-versa, it always shows up with parenthesis (in case of the polynomials). Here is the code, the function not working is the poly2list, the other one are just to define what a monomial/polinomial is.
pvars([x,y,z]).
pvar(X):-pvars(V),member(X,V).
polinomial(X) :- monomial(X).
polinomial(P+M) :- monomial(M), polinomial(P).
monomial(X) :- pvar(X).
monomial(N) :- number(N).
monomial(X) :- power(X),!.
monomial(K*X) :- coefficient(K), power(X),!.
coefficient(N) :- number(N).
power(X) :- pvar(X),!.
power(X^Y) :- pvar(X), integer(Y), Y>1,!.
poly2list(X,[X]) :- monomial(X),!.
poly2list(X+P,[X|Y]) :- monomial(X), poly2list(P,Y).
For example, when i ask:
poly2list(X,[2*x^2,3,y]).
The result is:
X = 2*x^2+(3+y)
And I'm trying to get:
X = 2*x^2+3+y
Thanks in advance :)
prolog
prolog
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
edited Nov 12 '18 at 17:35
Tiago Ferrero
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
asked Nov 12 '18 at 14:58
Tiago FerreroTiago Ferrero
12
12
Make a left recursive expression.
– Willem Van Onsem
Nov 12 '18 at 17:56
Thank you, i managed to do it.
– Tiago Ferrero
Nov 13 '18 at 10:41
add a comment |
Make a left recursive expression.
– Willem Van Onsem
Nov 12 '18 at 17:56
Thank you, i managed to do it.
– Tiago Ferrero
Nov 13 '18 at 10:41
Make a left recursive expression.
– Willem Van Onsem
Nov 12 '18 at 17:56
Make a left recursive expression.
– Willem Van Onsem
Nov 12 '18 at 17:56
Thank you, i managed to do it.
– Tiago Ferrero
Nov 13 '18 at 10:41
Thank you, i managed to do it.
– Tiago Ferrero
Nov 13 '18 at 10:41
add a comment |
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Make a left recursive expression.
– Willem Van Onsem
Nov 12 '18 at 17:56
Thank you, i managed to do it.
– Tiago Ferrero
Nov 13 '18 at 10:41