Displaying 20 results from an estimated 9000 matches similar to: "possible bug in chron packages"
2012 Jun 08
3
day of the year for chron objects
Hi!
Is not there an standard R function to retrieve the day of the year
(since 1st Jan of the same year)?
I know I can make my own using julian, but find it weird that having
days(), months() etc doy() does not exist as an standard function.
Also, is the following not a bit inconsistent?
> a <- chron("20100506",format="ymd")
> a
[1] 100506
> years(a)
[1] 2010
2004 Jun 14
4
Quirks with system.time and simulations
I tried the code that Richard O'Keefe posted last week, to wit:
library(chron)
ymd.to.POSIXlt <-
function (y, m, d) as.POSIXlt(chron(julian(y=y, x=m, d=d)))
n <- 100000
y <- sample(1970:2004, n, replace=TRUE)
m <- sample(1:12, n, replace=TRUE)
d <- sample(1:28, n, replace=TRUE)
system.time(ymd.to.POSIXlt(y, m, d))
[1] 8.78 0.10
2017 May 31
1
stats::line() does not produce correct Tukey line when n mod 6 is 2 or 3
> On 31 May 2017, at 16:40 , Joris Meys <jorismeys at gmail.com> wrote:
>
> And with "equally spaced" I obviously meant "of equal size". It's getting
> too hot in the office here...
We have a fair amount of cool westerly wind up here that I could transfer to you via WWTP (Wind and Weather Transport Protocol). If you open up a sufficiently large pipe,
2015 Apr 01
1
evaluation in transform versus within
On 01/04/2015 2:33 PM, Joris Meys wrote:
> Thank you for the insights. I understood as much from the code, but I
> can't really see how this can cause a problem when using with() or
> within() within a package or a function. The environments behave like
> I would expect, as does the evaluation of the arguments. The second
> argument is supposed to be an expression, so I
2010 Dec 21
2
Warning message when items of Hmisc are masked by loading a package.
I've noticed that I get a warning message every time a package masks
some functions from Hmisc. The warning message says :
Warning message:
In identical(get(., i), get(., lib.pos)) : ignoring non-pairlist attributes
This happens with eg:
library(plyr)
library(xtable)
I think I've seen this passing by before, but I'm not sure any more.
Just thought I'd mention it.
Cheers
Joris
2014 Apr 19
1
lag() not returning a time series object
Dear all,
Before I file this as a bug, I wanted to check if I didn't miss something.
The help page of lag() says that the function returns a time series object.
It actually does return something that looks like a ts object (the
attribute tsp is set). But when using a vector, the class "ts" is not added
to the result:
> avec <- 1:10
> lag(avec)
[1] 1 2 3 4 5 6 7 8
2011 Feb 15
1
Using rasterImage on a CairoWin device prevents adding further elements to device?
I was pointed to the Cairo package for plotting PNG images on a
device. I've been playing around with it, but found that after I use
the rasterImage function, I can't add anything any more to the device,
eg :
img <- readPNG(system.file("img", "Rlogo.png", package="png"))
r = as.raster(img[,,1:3])
r[img[,,4] == 0] = "white"
CairoWin()
2006 Jun 15
1
Problem with Julian function
Dear all,
I have a problem with the function Julian, may be a bug in the function ?
Here is a vector of character, which represents dates (May 18 to May 20
2000):
> amj <- c("2000-05-18","2000-05-18","2000-05-18","2000-05-19","2000-05-19"
> ,"2000-05-19", "2000-05-19", "2000-05-20", "2000-05-20",
2017 May 23
1
help pages base R not rendered correctly?
Hi Duncan,
that explains, thank you. If nobody finds the time to fix that, I might
give it a shot myself this summer. Barbeque is overrated.
Cheers
Joris
On Tue, May 23, 2017 at 3:10 PM, Duncan Murdoch <murdoch.duncan at gmail.com>
wrote:
> On 23/05/2017 8:39 AM, Joris Meys wrote:
>
>> Hi all,
>>
>> Don't know if this is a known issue, but I couldn't find
2011 Aug 07
1
all.equal doesn't work for POSIXlt objects
Hi all,
following sample code illustrates the problem :
Date1 <- Date2 <-
as.POSIXlt(seq.Date(as.Date("2010-04-01"),as.Date("2011-04-01"),by='day'))
identical(Date1,Date2)
all.equal(Date1,Date2)
identical() gives the correct answer. As there is no all.equal method
for POSIXlt objects, all.equal.list is used instead. Subsetting using
[[]] doesn't work
2010 Mar 30
2
weighted.median function from package R.basic
Dear all,
I want to apply a weighted median on a huge dataset, and I remember a
function from the package R.basic that could do this using an internal
sorting algorithm qsort. This speeded things up quite a bit. Alas, I can't
find that package anywhere anymore. There is a weighted.median function in
the package limma too, but I didn't use that before.
Anybody who knows what happened to
2017 Mar 24
2
non-infectious license for R package?
The key difference being that while not under the GPL, highcharter is still
open source. There isn't a single compiled library in the entire package.
WinBUGS otoh is closed source (although there is an open source version of
it, OpenBUGS). As far as I understood, CRAN doesn't accept packages
containing any binary executable code without the proper source files
attached. So including the
2011 Feb 04
2
terribly annoying bug with POSIXlt : one o'clock is midnight?
Apparently, as.POSIXlt takes one o'clock as the start of the day :
> as.POSIXlt(0,origin="1970-01-01")
[1] "1970-01-01 01:00:00 CET"
> as.POSIXlt(0,origin="1970-01-01 00:00:00")
[1] "1970-01-01 01:00:00 CET"
> as.POSIXlt(0,origin="1970-01-01 23:59:59")
[1] "1970-01-02 00:59:59 CET"
Cheers
--
Joris Meys
Statistical
2014 Oct 03
2
How I() works in a formula
Dear all,
I'm updating a package regarding a new type of models, and I'm looking to
extend the formula interface with two functions (L() and R() ) for
construction of these models. I want to use as much of the formula
interface as possible, and hoped to do something similarly to I().
I know the I() function does nothing more than add the class "AsIs". I've
been browsing the
2010 Apr 02
2
compare multiple values with vector and return vector
Dear all,
I have a vector, and for each element I want to check whether it is equal to
any element from another vector. I want a vector of logical values with the
length of the first one as return. In R this would be :
> x <- 1:10
> sapply(x,function(y){any(y==c("2","3","4"))})
[1] FALSE TRUE TRUE TRUE FALSE FALSE FALSE FALSE FALSE FALSE
It works pretty
2010 Jul 28
1
strange error : isS4(x) in gamm function (mgcv package). Variable in data-frame not recognized???
Dear all,
I run a gamm with following call :
result <- try(gamm(values~ s( VM )+s( RH )+s( TT )+s( PP
)+RF+weekend+s(day)+s(julday) ,correlation=corCAR1(form=~ day|month
),data=tmp) )"
with mgcv version 1.6.2
No stress about the data, the error is not data-related. I get :
Error in isS4(x) : object 'VM' not found
What so? I did define the dataframe to be used, and the
2017 May 18
2
[R] R-3.4.0 fails test
> On 18 May 2017, at 13:47 , Joris Meys <jorismeys at gmail.com> wrote:
>
> Correction: Also dlt uses the default timezone, but POSIXlt is not recalculated whereas POSIXct is. Reason for that is the different way values are stored (hours, minutes, seconds as opposed to minutes from origin, as explained in my previous mail)
>
I would suspect that there is something more subtle
2017 May 23
2
help pages base R not rendered correctly?
Hi all,
Don't know if this is a known issue, but I couldn't find anything so I
report anyway. When checking eg ?qr in both RStudio and the naked R IDE,
the help page is rendered incorrectly. More specifically, any use of
\bold{...} is printed as is, rather than interpreted as bold. Same happens
on ?svd.
According to the manual Writing R Extensions, this should still be
recognized. When I
2010 May 08
2
apply a function on elements of a list two by two
Dear all,
I want to apply a function to list elements, two by two. I hoped that combn
would help me out, but I can't get it to work. A nested for-loop works, but
seems highly inefficient when you have large lists. Is there a more
efficient way of approaching this?
# Make some toy data
data(iris)
test <- vector("list",3)
for (i in 1:3){
x <- levels(iris$Species)[i]
tmp
2004 May 27
3
Date parsing question
How do I parse a date "yyyymmdd"? I tried asking chron(s, "ymd") but
that didn't work. Would the date parsing routines of the Date class of
1.9 grok this?
--
Ajay Shah Consultant
ajayshah at mayin.org Department of Economic Affairs
http://www.mayin.org/ajayshah Ministry of Finance, New Delhi