1. Integer() operation on a sequence?
not too suprisingly I cannot do this
s = integer({0.12321,0.44343,1,1,0.555})
- s becomes {0,0,1,1,0}
So howabout?
s = integers({sequence})
Secondly; a sequence summation operator
i= ~sigma ({sequence s from above})
i = 2
--"ask about our layaway plan".
--
2. Re: Integer() operation on a sequence?
Michael Raley wrote:
>
>
> not too suprisingly I cannot do this
>
> s = integer({0.12321,0.44343,1,1,0.555})
> - s becomes {0,0,1,1,0}
>
> So howabout?
> s = integers({sequence})
Does
s = floor( {sequence} )
do what you want?
3. Re: Integer() operation on a sequence?
On Fri, 04 Jun 2004 13:02:59 -0700, irv mullins
<guest at RapidEuphoria.com> wrote:
>posted by: irv mullins <irvm at ellijay.com>
>Andy Serpa wrote:
>> cklester wrote:
>> > Michael Raley wrote:
>> > > not too suprisingly I cannot do this
>> > >
>> > > s = integer({0.12321,0.44343,1,1,0.555})
>> > > - s becomes {0,0,1,1,0}
>> > >
>> > > So howabout?
>> > > s = integers({sequence})
>> >
>> > Does
>> >
>> > s = floor( {sequence} )
>> >
>> > do what you want?
>>
>> I think what he wants is:
>>
>> function integers(sequence s)
>> return floor(s) = s
>> end function
>>
>
>constant s = {0.12321,0.44343,1,1,0.555}
>
> ? floor(s)
> ? floor(s) = s
>
>
>{0,0,1,1,0}
>{0,0,1,1,0}
>
>
>Press Enter...
>
>Looks like you're both right (unless one of the integers > 1, in which
>case at least one of you is wrong :)
>
>Irv
Note that:
constant s={0.1,1,2,{3,4.5,6}}
?s=floor(s)
will display {0,1,1,{1,0,1}}, instead of {0,1,1,0}.
Regards,
Pete
4. Re: Integer() operation on a sequence?
Michael Raley wrote:
>
>
> not too suprisingly I cannot do this
>
> s = integer({0.12321,0.44343,1,1,0.555})
> - s becomes {0,0,1,1,0}
What were you expecting to achieve?
** Did you wish to convert each of the elements into an integer?
seq s s = floor({0.12321,0.44343,1,1,0.555})
** Did wish to see if each element was an integer?
seq s s = integer({0.12321,0.44343,1,1,0.555})
** Did you wish to see if the entire paramter was an integer?
integer s if integer({0.12321,0.44343,1,1,0.555}) then
s = 1 else s = 0 end if
** Did you wish to convert the entire parameter into a single integer?
sequence s s = value({0.12321,0.44343,1,1,0.555})
> So howabout?
> s = integers({sequence})
What is supposed to return? The number of integers in the sequence?
s = integer (x)
y = 0
for i = 1 to length(x)
y += x[i]
end for
> Secondly; a sequence summation operator
> i= ~sigma ({sequence s from above})
> i = 2
Euphoria does allow a fair degree of flexibility. How about this version
of sigma for you...
function i_qual(object x)
if integer(x) then
return 1
else
return 0
end if
end function
function a_qual(object x)
if atom(x) then
return 1
else
return 0
end if
end function
function p_qual(object x)
if atom(x) and x > 0 then
return 1
else
return 0
end if
end function
function n_qual(object x)
if atom(x) and x < 0 then
return 1
else
return 0
end if
end function
constant OnlyIntegers = routine_id("i_qual"),
OnlyAtoms = routine_id("a_qual"),
OnlyPos = routine_id("p_qual"),
OnlyNeg = routine_id("n_qual")
function sigma(sequence x, object qual)
object y
integer t
if atom(qual) then qual ={qual} end if
y = 0
for i = 1 to length(x) do
t = 0
for j = 1 to length(qual) do
t += call_func(qual[j],{x[i]})
end for
if t = length(qual) then
y += x[i]
end if
end for
return y
end function
sequence s
s = {0.12321,-0.44343,1,-2,0.555}
? sigma(s, OnlyIntegers)
? sigma(s, OnlyAtoms)
? sigma(s, {OnlyIntegers,OnlyPos})
? sigma(s, {OnlyAtoms,OnlyNeg})
? sigma(s, {OnlyAtoms,OnlyPos})
? sigma(s, {OnlyIntegers,OnlyNeg})
What I'm trying to say is that you could try out writing your own function
first and if that is not ever going to be fast enough for your needs,
then you could lobby RDS for a new built-in routine.
--
Derek Parnell
Melbourne, Australia
5. Re: Integer() operation on a sequence?
>From: Derek Parnell <guest at RapidEuphoria.com>
>Reply-To: EUforum at topica.com
>To: EUforum at topica.com
>Subject: Re: Integer() operation on a sequence?
>Date: Sat, 05 Jun 2004 18:02:04 -0700
>
>Michael Raley wrote:
> > not too suprisingly I cannot do this
> >
> > s = integer({0.12321,0.44343,1,1,0.555})
> > - s becomes {0,0,1,1,0}
>
That is not what integer() is for. Obviously, you cannot do that.
>What were you expecting to achieve?
>
>** Did you wish to convert each of the elements into an integer?
> seq s s = floor({0.12321,0.44343,1,1,0.555})
>
>** Did wish to see if each element was an integer?
> seq s s = integer({0.12321,0.44343,1,1,0.555})
>
You'd need a for-loop for that one, Derek. You'll get a type-check error
because integer() will return 0.
>** Did you wish to see if the entire paramter was an integer?
> integer s if integer({0.12321,0.44343,1,1,0.555}) then
> s = 1 else s = 0 end if
>
>** Did you wish to convert the entire parameter into a single integer?
> sequence s s = value({0.12321,0.44343,1,1,0.555})
>
Uh... What?
>
>
> > So howabout?
> > s = integers({sequence})
>
>What is supposed to return? The number of integers in the sequence?
>
> s = integer (x)
> y = 0
> for i = 1 to length(x)
> y += x[i]
> end for
>
That would give you the sum of the values in the sequence. I'm not sure what
s if for either. You mean:
y = 0
for i = 1 to length(x) do
y += integer(x[i])
end for
> > Secondly; a sequence summation operator
> > i= ~sigma ({sequence s from above})
> > i = 2
>
Don't use the tilde! I wanted that for ignoring return values of
functions. That's a whole other topic which could be discussed in another
thread. As Derek said, though, you don't need a new operator for such a
thing.
>
[stuff written that I didn't comment on]
>
~[ WingZone ]~
http://wingzone.tripod.com/
6. Re: Integer() operation on a sequence?
Derek Parnell wrote:
>
> Michael Raley wrote:
> >
> >
> > not too suprisingly I cannot do this
> What were you expecting to achieve?
As I stated in the example with integer,
to apply the test to a slice of elements
and return a sequence of True/False values.
i.e (1,0,0,1,1,0)
>
> What I'm trying to say is that you could try out writing your own function
> first and if that is not ever going to be fast enough for your needs,
> then you could lobby RDS for a new built-in routine.
>
Yes I could, but I think the functionality has as much broader merit as
current native functions and should at least be mentioned.
7. Re: Integer() operation on a sequence?
Michael Raley wrote:
>
>
> Derek Parnell wrote:
> >
> > Michael Raley wrote:
> > >
> > >
> > > not too suprisingly I cannot do this
> > What were you expecting to achieve?
> As I stated in the example with integer,
> to apply the test to a slice of elements
> and return a sequence of True/False values.
> i.e (1,0,0,1,1,0)
Sorry. I totally misunderstood your question.
> > What I'm trying to say is that you could try out writing your own function
> > first and if that is not ever going to be fast enough for your needs,
> > then you could lobby RDS for a new built-in routine.
> >
> Yes I could, but I think the functionality has as much broader merit as
> current native functions and should at least be mentioned.
Hmmm...I'll take your word for that, as I've never needed this
or similar functionalty yet. It strikes me as not necessary as
what are you going to do with the resultant sequence? My guess is
that you will examine each result element and do something appropriate.
In which case what is different between ...
s = integers({2.3, 0, 5, 3.22, -4})
for i = 1 to length(s) do
--
Derek Parnell
Melbourne, Australia
8. Re: Integer() operation on a sequence?
Michael Raley wrote:
>
>
> Derek Parnell wrote:
> >
> > Michael Raley wrote:
> > >
> > >
> > > not too suprisingly I cannot do this
> > What were you expecting to achieve?
> As I stated in the example with integer,
> to apply the test to a slice of elements
> and return a sequence of True/False values.
> i.e (1,0,0,1,1,0)
> >
> > What I'm trying to say is that you could try out writing your own function
> > first and if that is not ever going to be fast enough for your needs,
> > then you could lobby RDS for a new built-in routine.
> >
> Yes I could, but I think the functionality has as much broader merit as
> current native functions and should at least be mentioned.
My previous reply was incomplete because I pressed the TAB key followed
by the ENTER key, thus causing focus to move the the 'Send Now' button
and sending it. Robert/Junko: Maybe this is a minor GUI issue you can tweak.
Anyhow, back to the thread...
What is the difference between ...
s = integers({2.4, 1, 0, 3.22, -5})
for i = 1 to length(s) do
if s[i] then
...
end if
end for
and
s = {2.4, 1, 0, 3.22, -5}
for i = 1 to length(s) do
if integer(s[i]) then
...
end if
end for
--
Derek Parnell
Melbourne, Australia
9. Re: Integer() operation on a sequence?
>
> Hmmm...I'll take your word for that, as I've never needed this
> or similar functionalty yet. It strikes me as not necessary as
> what are you going to do with the resultant sequence? My guess is
> that you will examine each result element and do something appropriate.
> In which case what is different between ...
>
> s = integers({2.3, 0, 5, 3.22, -4})
> for i = 1 to length(s) do
>
> --
> Derek Parnell
> Melbourne, Australia
>
actually I'm imagining using it to find patterns in data;
vertical_length = 3000
reallybigsequence = {0,1,2,3,4,5,6,7,1,4,3,4,5,7,1,4,0,...and so on
pattern = {1,1,repeat(0,vertical_length/2),1,1,0}
for i = 1 to 7
m = find(pattern,integers(i/reallybigsequence))
if m then blah blah blah
end for
