> "MS" == Marc Schwartz
> on Tue, 21 Apr 2009 08:06:46 -0500 writes:
MS> On Apr 21, 2009, at 5:55 AM, Duncan Murdoch wrote:
>> On 21/04/2009 3:48 AM, Petr PIKAL wrote:
>>> Hi
>>> r-help-boun...@r-project.org napsal dne 20.04.2009 19:01:46:
wolfgang.siewert gm
I'd be happy if everyone made a minimal effort to solve their problems
before posting. There may be 130 pages of printed FAQs, but the
html file is fully searchable. It would be easier to browse with a good ToC,
but it's not that overwhelming to _look to see if there's a FAQ related to
your problem
> "Have you read the posting guide and the FAQs? If you do not get a reply
> within two days, you may want to look at both and think about reformulating
> your query. Oh, and while you are at it, look through the archives, a lot of
> questions have already been asked and answered before."
As I say
A quarter-century ago I was part of the IEEE 854 group that tried to
suggest a
radix free arithmetic standard. One of the interests was decimal
arithmetic. I actually
have owned 2 decimal arithmetic computers, a North Star Horizon (with
decimal
hardware I had to build by hand from a kit) and a R
try this
> 0.3-0.1 == 0.2
[1] FALSE
> round(0.3-0.1,1)==round(0.2,1)
[1] TRUE
liov
2009/4/21 Marc Schwartz
> On Apr 21, 2009, at 5:55 AM, Duncan Murdoch wrote:
>
> On 21/04/2009 3:48 AM, Petr PIKAL wrote:
>>
>>> Hi
>>> r-help-boun...@r-project.org napsal dne 20.04.2009 19:01:46:
>>>
wolf
On Apr 21, 2009, at 5:55 AM, Duncan Murdoch wrote:
On 21/04/2009 3:48 AM, Petr PIKAL wrote:
Hi
r-help-boun...@r-project.org napsal dne 20.04.2009 19:01:46:
wolfgang.siewert gmail.com> writes:
There is a way around: round(0.7-0.3,1)==0.4
(TRUE)
Obviously there is a problem with some combina
On 21/04/2009 3:48 AM, Petr PIKAL wrote:
Hi
r-help-boun...@r-project.org napsal dne 20.04.2009 19:01:46:
wolfgang.siewert gmail.com> writes:
There is a way around:
round(0.7-0.3,1)==0.4
(TRUE)
Obviously there is a problem with some combinations of decimal
subtractions,
that - we have t
r-help-boun...@r-project.org napsal dne 21.04.2009 10:00:06:
> Petr PIKAL precheza.cz> writes:
>
> > Maybe that is because of Excel is so widespread now and gives expected
> > results (it probably silently rounds all decimal numbers before
> > calculation).
>
> Marc Schwartz already reminde
Petr PIKAL precheza.cz> writes:
> Maybe that is because of Excel is so widespread now and gives expected
> results (it probably silently rounds all decimal numbers before
> calculation).
Marc Schwartz already reminded me of that one, and it's a good point
to explicitly mention in lectures.
Hi
r-help-boun...@r-project.org napsal dne 20.04.2009 19:01:46:
> wolfgang.siewert gmail.com> writes:
>
> > There is a way around:
> > round(0.7-0.3,1)==0.4
> > (TRUE)
> >
> > Obviously there is a problem with some combinations of decimal
subtractions,
> > that - we have the feeling - should
Hi,
Gavin Simpson wrote:
I bemoan the apparent inability of those asking such questions to use
the resources provided to solve these problems for themselves...
Looking at all the people who quite obviously do NOT "read the posting
guide and provide commented, minimal, self-contained, reprod
Dieter Menne wrote:
wolfgang.siewert gmail.com> writes:
There is a way around:
round(0.7-0.3,1)==0.4
(TRUE)
Obviously there is a problem with some combinations of decimal subtractions,
that - we have the feeling - shouldt be solved.
Oh no, not that one again! This was lecture two in my fir
wolfgang.siewert gmail.com> writes:
> There is a way around:
> round(0.7-0.3,1)==0.4
> (TRUE)
>
> Obviously there is a problem with some combinations of decimal subtractions,
> that - we have the feeling - shouldt be solved.
Oh no, not that one again! This was lecture two in my first computer
this is a (very) Frequently Asked Question; check:
http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
Best,
Dimitris
wolfgang.siewert wrote:
Try this:
0.7-0.3==0.4
(We get FALSE)
0.7-0.3<0.4
(We get TRUE)
but
0.8-0.3==0.5
(TRUE)
0.8-0.3<0.5
(F
This is a FAQ.
Try this:
all.equal(0.7-0.3, 0.4)
On Mon, Apr 20, 2009 at 10:07 AM, wolfgang.siewert <
wolfgang.siew...@gmail.com> wrote:
>
> Try this:
>
> 0.7-0.3==0.4
> (We get FALSE)
> 0.7-0.3<0.4
> (We get TRUE)
>
> but
> 0.8-0.3==0.5
> (TRUE)
> 0.8-0.3<0.5
> (FALSE)
>
> Funny, he?
>
> There
Try this:
0.7-0.3==0.4
(We get FALSE)
0.7-0.3<0.4
(We get TRUE)
but
0.8-0.3==0.5
(TRUE)
0.8-0.3<0.5
(FALSE)
Funny, he?
There is a way around:
round(0.7-0.3,1)==0.4
(TRUE)
Obviously there is a problem with some combinations of decimal subtractions,
that - we have the feeling - shouldt be solv
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