G'day Werner,
WB == Werner Bier [EMAIL PROTECTED] writes:
floor((5.05-floor(5))*100)
WB [1] 4
WB I would expect 5, or am I wrong?
You are wrong. :)
Consider:
(5.05-floor(5))*100
[1] 5
(5.05-floor(5))*100 - 5
[1] -1.776357e-14
and read FAQ 7.31
Cheers,
Berwin
I believe this is a FAQ.
Examine:
format((5.05-floor(5))*100, nsmall=16)
[1] 4.9822
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Werner Bier
Sent: Tuesday, November 29, 2005 3:35 PM
To: r-help@stat.math.ethz.ch
Subject: [R] floor()
Yep! You are right I am going through it right now
Thanks
W
Austin, Matt [EMAIL PROTECTED] wrote:
I believe this is a FAQ.
Examine:
format((5.05-floor(5))*100, nsmall=16)
[1] 4.9822
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
On 29-Nov-05 Werner Bier wrote:
Dear All,
Is this right?
floor((5.05-floor(5))*100)
[1] 4
I would expect 5, or am I wrong?
Thanks and regards,
W
It may seem reasonable to expect it, but in the case of R
(and most other computer languages) you would be wrong.
On 8/9/05 7:42 AM, Simon Woodhead [EMAIL PROTECTED] wrote:
Dear all,
Could someone please explain the following perculiarity?
2 == 0.2/0.1
[1] TRUE
3 == 0.3/0.1
[1] FALSE
Similarly,
floor(0.2/0.1) = 2
floor(0.3/0.1) = 2
This is a FAQ
Simon Woodhead wrote:
Dear all,
Could someone please explain the following perculiarity?
Please read the FAQ Why doesn't R think these numbers are equal (as
the posting gude asks you to do).
Uwe Ligges
2 == 0.2/0.1
[1] TRUE
3 == 0.3/0.1
[1] FALSE
Similarly,
floor(0.2/0.1)
Look at ?Comparison, especially in the Note section, i.e.,
3 == 0.3/0.1
identical(all.equal(3, 0.3/0.1), TRUE)
Best,
Dimitris
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel:
Marcus Davy [EMAIL PROTECTED] writes:
I couldnt find a previous posting on this in the archives, maybe it has
already been mentioned.
If you use a calculation to generate n observations in random number
generators and you don't round to the nearest integer you may be
generating n-1 numbers
