Re: Enumerating and eliminating

[zak seidov <zakseidov@yahoo.com>]

Charles,

thanks for listput!

I also found listpop - to remove element by index.

And how eliminate element by his value?

Thanks,

Zak

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From: Charles Greathouse <charles.greathouse@case.edu>
To: Phuongha <Phuongha85@yahoo.com>; pari-users@pari.math.u-bordeaux.fr
Sent: Saturday, June 15, 2013 4:42 PM
Subject: Re: Enumerating and eliminating

(the right address is pari-users@pari.math.u-bordeaux.fr )

You could store them in a list. So

v=List(); for(k=1,10,x=k+3;if(x<10,listput(v, x))); vecsort(Vec(v))

and

v=List(); for(k=1,5,if(k<3,y=k,y=k-2);listput(v, y)); vecsort(Vec(v),,8)

Charles Greathouse
Analyst/Programmer
Case Western Reserve University

On Sat, Jun 15, 2013 at 8:36 AM, Phuongha <Phuongha85@yahoo.com> wrote:

Could you please help me to enumerate and eliminate elements of a set?
For example, from a loop:
for(k=1,10,x=k+3;if(x<10,print(x," ",k)))
I get the result:
4 1
5 2
6 3
7 4
8 5
9 6
And I want to enumerate the values of x as x[1]=4,....,x[6]=9.

Another example:
for(k=1,5,if(k<3,y=k,y=k-2);print(y))
and the result:
1
2
1
2
3

Here I have 2 values of y are repeated (1 and 2) and I would like to
eliminate them and write a set A={value of y}={1,2,3} and then enumerate the
values of y as y[1]=1,y[2]=2,y[3]=3...

However, I do not know how to do this @@.
I wonder if there is someone help me solve it?

Thank you so much.
Phuong Ha.