I've just voted up all you posted thus far, so hopefully you are getting there (where you'll be able to vote up :)

Alec

@kh2n 

I am on the go and can't check that immediately. I think, there were 4 Arrays in Q1. Maybe, all of them are the same?

Another possibility is that Q1 is a set and not a list, so maybe, one has to convert it to list first, before printing to a text file.

Alec

@kh2n 

I am on the go and can't check that immediately. I think, there were 4 Arrays in Q1. Maybe, all of them are the same?

Another possibility is that Q1 is a set and not a list, so maybe, one has to convert it to list first, before printing to a text file.

Alec

@hirnyk 

There is an option normalized.

The advantage of using it is that you don't have to add an artificial 3rd coordinate.

Alec

@hirnyk 

There is an option normalized.

The advantage of using it is that you don't have to add an artificial 3rd coordinate.

Alec

VectorCalculus:-PrincipalNormal seems to be better suited for that.

Alec

VectorCalculus:-PrincipalNormal seems to be better suited for that.

Alec

For example,

x:=<1,2,3>:
y:=convert(x,list)[];

                             y := 1, 2, 3

sum(y[i],i=1..3);

                                  6

or

z:=seq(i,i=x);

                             z := 1, 2, 3

sum(z[i],i=1..3);

                                  6

It is not the "recommended" way, because add should be used here instead of sum, but might work for your purposes.

Alec

For example,

x:=<1,2,3>:
y:=convert(x,list)[];

                             y := 1, 2, 3

sum(y[i],i=1..3);

                                  6

or

z:=seq(i,i=x);

                             z := 1, 2, 3

sum(z[i],i=1..3);

                                  6

It is not the "recommended" way, because add should be used here instead of sum, but might work for your purposes.

Alec

Instead of implicitplot, the following can be used for plotting,

algcurves[plot_real_curve](16*x^4-y^4-y^3-3*x^2+y+1, x, y,
view=[-2..2, -4..4], scaling=constrained);

One of asymptotes in this example could be found as

x=convert(asympt(RootOf(16*x^4-y^4-y^3-3*x^2+y+1,x),y,1),polynom);

                           x = - y/2 - 1/8

solve({%},y)[];

                            y = -2 x - 1/4

and another one follows from the symmetry,

eval(%,x=-x);

                            y = 2 x - 1/4

Trying doing that as in the first example in this thread shows a bug in asympt,

restart;
asympt(RootOf(16*x^4-y^4-y^3-3*x^2+y+1,y),x,2);

                                  pt

(which sounds as pity).

Alec

Instead of implicitplot, the following can be used for plotting,

algcurves[plot_real_curve](16*x^4-y^4-y^3-3*x^2+y+1, x, y,
view=[-2..2, -4..4], scaling=constrained);

One of asymptotes in this example could be found as

x=convert(asympt(RootOf(16*x^4-y^4-y^3-3*x^2+y+1,x),y,1),polynom);

                           x = - y/2 - 1/8

solve({%},y)[];

                            y = -2 x - 1/4

and another one follows from the symmetry,

eval(%,x=-x);

                            y = 2 x - 1/4

Trying doing that as in the first example in this thread shows a bug in asympt,

restart;
asympt(RootOf(16*x^4-y^4-y^3-3*x^2+y+1,y),x,2);

                                  pt

(which sounds as pity).

Alec

@Alejandro Jakubi 

Yes, it's from a thread on how to select real roots from the solve output, I think. But there might be a couple of other quotes as well. Perhaps, he didn't exactly use the word "plague", but the meaning was similar.

It's nice that you have those archives saved. I used to have some, but not everything, and then after a couple of hard drive crashes, I lost a lot, and not everything was backed-up.

Alec

@Alejandro Jakubi 

Yes, it's from a thread on how to select real roots from the solve output, I think. But there might be a couple of other quotes as well. Perhaps, he didn't exactly use the word "plague", but the meaning was similar.

It's nice that you have those archives saved. I used to have some, but not everything, and then after a couple of hard drive crashes, I lost a lot, and not everything was backed-up.

Alec

I voted up your answer - so now your score is positive and you got 1 badge - Tutor (for submitting an answer voted up.)

Welcome to the community!

Alec

I voted up your answer - so now your score is positive and you got 1 badge - Tutor (for submitting an answer voted up.)

Welcome to the community!

Alec