Displaying 20 results from an estimated 1200 matches similar to: "NAs produced by integer overflow, but only some time ..."
2018 May 09
0
NAs produced by integer overflow, but only some time ...
a) Numeric values may be either integers (signed 32 bit) or double precision (53 bit mantissa).
b) Double precision constants are numeric with no decoration (e.g. 61224). Integer constants have an L (e.g. 61224L).
c) 61224*61224 > 2^31-1 so that answer cannot fit into an integer.
d) Exponentiation is a floating point operation so the result of 61224L^2L is a floating point answer that CAN
2018 May 09
1
NAs produced by integer overflow, but only some time ...
Printing a number does not show whether it is stored
as a 32-bit integer or as a 64-bit floating point value.
Use. e.g., str() or class() to see.
> str(length(runif(3)))
int 3
> str(length(runif(3)) + 1)
num 4
> str(length(runif(3)) + 1L)
int 4
> str( 3L * 3L )
int 9
> str( 3L ^ 2L )
num 9
You are right that various arithmetic operators map a pair
of
2018 May 09
2
NAs produced by integer overflow, but only some time ...
Before responding to Jeff's posting, let me reiterate my question: Why
does a function using m1*m1 produce an integer overflow, but m1^2 does
not?
As for Jeff's 'response':
> a) Numeric values may be either integers (signed 32 bit) or double precision (53 bit mantissa).
> b) Double precision constants are numeric with no decoration (e.g. 61224). Integer constants have an L
2012 Sep 20
3
(no subject)
>From my book on corpus linguistics with R:
# (10) Imagine you have two vectors a and b such that
a<-c("d", "d", "j", "f", "e", "g", "f", "f", "i", "g")
b<-c("a", "g", "d", "f", "g", "a", "f", "a",
2011 Mar 05
1
pvclust crashing R on Ubuntu 10.10
Hi all
I am writing to you with a question regarding the pvclust package. And
yes, before the usual people produce their usual
contact-the-package-maintainers line, ye, I tried that but the emails
one can find on the web either bounce or are not responded to. Also,
yes, this error has already been reported as a bug but been shot down
as not reproducible
2009 Jan 27
1
rJava in R 2.8.1 on Ubuntu 8.10
Hi all
I have problems installing rJava on my system.
######## My system:
> R.version # at R prompt
platform x86_64-pc-linux-gnu
arch x86_64
os linux-gnu
system x86_64, linux-gnu
status
major 2
minor 8.1
year 2008
month 12
day 22
svn rev 47281
language R
version.string R version 2.8.1
2011 Mar 03
6
Developing a web crawler
Hi,
I wish to develop a web crawler in R. I have been using the functionalities
available under the RCurl package.
I am able to extract the html content of the site but i don't know how to go
about analyzing the html formatted document.
I wish to know the frequency of a word in the document. I am only acquainted
with analyzing data sets.
So how should i go about analyzing data that is not
2007 Dec 01
2
NAs produced by integer overflow (PR#10482)
Full_Name: Stefan Th. Gries
Version: R version 2.6.1 (2007-11-26)
OS: Windows XP Home SP2
Submission from: (NULL) (68.6.47.105)
Hi
A simple computation results in integer overflow:
These are the relevant vectors:
> sum(cur.obs)
[1] 110231
> colfreq
other past perfect present progressive
14845 1222 4776 101347 2863
>
2006 Sep 21
2
Command area in SciViews 0.8.9 - second try
Dear all
I am writing again with a question I posted a few weeks ago (to no avail). I have a problem with SciViews for R. It's probably a slightly stupid question but I cannot find a solution to a very elementary problem. I am using SciViews 0.8.9 on with R 2.3.1pat on a Windows XP Home machine. R is set to SDI mode, I start R, enter "library(svGUI)", SciViews starts properly, I can
2006 Jul 23
3
RfW 2.3.1: regular expressions to detect pairs of identical word-final character sequences
Dear all
I use R for Windows 2.3.1 on a fully updated Windows XP Home SP2 machine and I have two related regular expression problems.
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor
2016 Apr 14
2
Integer -> Floating point -> Integer cast optimizations
I'm saying at the IR level, not the C level. IR makes certain assumptions about the representation of floating point numbers. Nothing to do with C, I only used it as an example.
- CL
> On Apr 14, 2016, at 4:49 PM, Martin J. O'Riordan <martin.oriordan at movidius.com> wrote:
>
> I don't think that this is correct.
>
> | Let's say we have an int x, and we
2016 Apr 15
2
Integer -> Floating point -> Integer cast optimizations
My understanding is that this checks whether the bit width of the integer *type* fits in the bit width of the mantissa, not the bit width of the integer value.
- CL
> On Apr 14, 2016, at 6:02 PM, escha at apple.com wrote:
>
> We already do this to some extent; see this code in InstCombineCasts:
>
> // fpto{s/u}i({u/s}itofp(X)) --> X or zext(X) or sext(X) or trunc(X)
> //
2016 Mar 02
2
Incorrect return values for APFloat::convertFromString?
I noticed some odd behavior with APFloat's convertFromString method.
1. If I pass the hex representation of the closest value to 0.1 (0x19999Ap-24), everything is fine and opOk is returned. However, if I pass the same value as a decimal string (0.10000002384185791015625), opInexact is set.
2. On the lower end of the scale, the smallest denormal 0x1p-149 returns opOk, but the
2009 Mar 18
4
[LLVMdev] decimal to floating point conversion
Hi all:
I need an instruction that can convert decimal values into floating point
numbers.
i.e. say I have a decimal number 1110794174 (== 42355FBE in hex ) and (==
45.3435 as a float)
essentially the mantissa and exponent representation needs to be used.
Is there any way of doing this in llvm?
Thanks and Regards
--
-- Aparna Kotha
Graduate Student
Electrical and Computer Engineering
2006 Feb 01
1
Word boundaries and gregexpr in R 2.2.1 (PR#8547)
Full_Name: Stefan Th. Gries
Version: 2.2.1
OS: Windows XP (Home and Professional)
Submission from: (NULL) (68.6.34.104)
The problem is this: I have a vector of two character strings.
> text<-c("This is a first example sentence.", "And this is a second example
sentence.")
If I now look for word boundaries with regexpr, this is what I get:
>
2006 Aug 06
6
View passing empty or no value to controller -- help
Hi,
I have the following view:
<%= start_form_tag ( { :action => ''find'' }, :method => ''get'') %>
<p>
<%= text_field_tag :lemma, params[:lemma] %>
</p>
<%= link_to "Find It", :class => "submit" %>
<%= end_form_tag %>
And the following find action in the controller:
2016 Jul 28
2
Weighting Schemes: Implementing Piv+ Normalization
> Two of those are compile errors, suggesting you aren't pulling in the
> right header file (it's in common/serialise-double.h I believe).
Thanks, fixed those errors.
> I can't tell for sure without seeing the diff. You may mean just
> `ptr++`? But it could be something else, depending on what you're
> trying to do.
I'm trying to unserialise normalization
2009 Jul 15
2
ifultools on ppc debian
I have tried to compile this from source. I don't know what Endianess
is, but it is probably not debian power pc. Am I would of luck with
this package?
Stephen Sefick
* Installing *source* package ?ifultools? ...
** libs
gcc -std=gnu99 -I/usr/local/lib/R/include -I"../inst/include/"
-D"MUTIL_STATIC" -D"DEF_TF" -D"INTERRUPT_ENABLE"
2009 Oct 02
3
break up a string into strings with a fixed length
dear all,
I have some very long strings and would like to break up each long string
into multiple strings with a fixed length, e.g. to break up
abcdefghijkl
into
abc, def, ghi, jkl
I tried a couple of commands but was not successful. Any help will be
appreciated.
Best,
Jimmy
--
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2010 Dec 25
2
predict.lrm vs. predict.glm (with newdata)
Hi all
I have run into a case where I don't understand why predict.lrm and
predict.glm don't yield the same results. My data look like this:
set.seed(1)
library(Design); ilogit <- function(x) { 1/(1+exp(-x)) }
ORDER <- factor(sample(c("mc-sc", "sc-mc"), 403, TRUE))
CONJ <- factor(sample(c("als", "bevor", "nachdem",