Displaying 20 results from an estimated 2000 matches similar to: "Summary: as.POSIXct"
2004 Mar 05
3
as.POSIXct problem
Hi all,
I'm having difficulty converting a 'dates' object to a POSIXct object:
testDATES<-c(35947,35971,36004,36008,36053,36066)
testDATES<-chron(dates=testDATES, format = c(dates = "m/d/y"),
origin=c(month = 12, day = 30, year = 1899))
>[1] 06/01/98 06/25/98 07/28/98 08/01/98 09/15/98 09/28/98
> as.POSIXct(testDATES)
[1] NA NA NA NA NA NA
2004 May 08
1
Installing R 1.9.0 on OSX
I've downloaded and installed R 1.9.0 under OS X 10.3.3. I then
removed my previous R 1.8.0 installation by following the
instructions in the readme file, e.g.,
1. drag the "StartR" icon into the Trash;
2) go inside your Home directory and search for the Library folder.
Inside the Library folder in your Home directory you'll
find a RAqua directory: drag the RAqua
2003 Dec 11
2
Failed installation on Mac OSX 10.3 (PR#5697)
I've installed R 1.8.1 on OSX 10.3 (Panther) using the RAqua.pkg and
all indications were that the installation was successful. However,
after double clicking the R icon in the Applications folder, nothing
appears to happen. The following message appears on the console:
Mac OS X Version 10.3 (Build 7B85)
2003-12-11 08:45:31 -0500
prefs written
dyld:
2003 Dec 11
2
Failed installation on Mac OSX 10.3 (PR#5697)
I've installed R 1.8.1 on OSX 10.3 (Panther) using the RAqua.pkg and
all indications were that the installation was successful. However,
after double clicking the R icon in the Applications folder, nothing
appears to happen. The following message appears on the console:
Mac OS X Version 10.3 (Build 7B85)
2003-12-11 08:45:31 -0500
prefs written
dyld:
2005 Jun 10
1
Fortran compilation error
Hello,
I'm trying to install a package that requires a Fortran compiler
(Hmisc) using R CMD INSTALL. I downloaded the package source onto my
Desktop, unzipped it, and then typed:
R CMD INSTALL /Users/brianbeckage/Desktop/Hmisc
* Installing *source* package 'Hmisc' ...
** libs
g77 -fno-common -g -O2 -c cidxcn.f -o cidxcn.o
g77 -fno-common -g -O2 -c cidxcp.f -o cidxcp.o
g77
2004 Aug 09
4
Simultaneous subscripts and superscripts
Dear List,
I'd like to add text to a plot where a text symbol has both a
superscript and subscript. For example, the variable S with a
superscript 2 and a subscript t. I have been able to accomplish this
using either
expression( paste(S,atop(scriptstyle(2),scriptstyle(t))) )
or
expression( {S[t]}^2 )
but the spacing isn't quite right (or rather what I'd like) using
either of
2003 Nov 12
3
Chron, as.POSIXct problem
Dear R list,
I noticed the following 'problem' when changing the format of dates
created with seq.dates() (from the Chron library) using as.POSIXct()
(R 1.8.0 on OSX 10.2.8):
> datesTest<-seq.dates(from="10/01/1952", length=3, by="days");
> datesTest
[1] 10/01/52 10/02/52 10/03/52
# Now changing the format to show year as 1952.
>
2003 Nov 11
3
Calendar Time Series
Hello,
Does R have any facilities for calendar time series? I'm working
with a 40 year long, daily time series and I would like to have each
datum associated with a calendar date. I searched the R website and
found several new packages for irregular time series but none for cts.
By the way, I just installed 1.8.0 on Mac OSX and the installation
was effortless! I also very much like
2012 Jan 26
0
R-help Digest, Vol 107, Issue 25
Hi Rui,
Thanks for your reply to my post. My code still has various shortcomings but at least now it is fully functional.
It may be that, as I transition to using R, I'll have to live with some less than ideal code, at least at the outset. I'll just have to write and re-write my code as I improve.
Appreciate your help.
Paul
Message: 66
Date: Tue, 24 Jan 2012 09:54:57 -0800 (PST)
2012 Jan 24
6
Checking for invalid dates: Code works but needs improvement
Hello Everyone,
Still new to R. Wrote some code that finds and prints invalid dates (see below). This code works but I suspect it's not very good. If someone could show me a better way, I'd greatly appreciate it.
Here is some information about what I'm trying to accomplish. My sense is that the R date functions are best at identifying invalid dates when fed character data in their
2004 Nov 22
2
variable object naming
Is it possible to give a temporary object a name that varies with each run of a
foreloop? For example, I want to fill a matrix every time I run a loop, and I
want a new matrix with each run, with an appropriate new name.
i.e.:
for(i in 1:5){... matrix.i<-some values ...}
so that in the end I would have:
matrix.1
matrix.2
matrix.3
matrix.4
matrix.5
Thanks,
Ben Osborne
--
Botany Department
2005 Mar 01
1
na.strings in readLines or is.na?
When reading a data set into R using readLines, na.strings="-99.99" is ignored.
Is there an equivalent command for readLines? Alternatively, either
immediately after reading into R or once the data set has been converted to a
data frame, what is the appropriate command (or appropriate use of is.na) to
convert my -99.99s to NAs?
Thanks,
Ben Osborne
--
Botany Department
University of
2005 Jan 26
1
summarizing daily time-series date by month
Message: 63
Date: Wed, 26 Jan 2005 04:28:51 +0000 (UTC)
From: Gabor Grothendieck <ggrothendieck at myway.com>
Subject: Re: [R] chron: parsing dates into a data frame using a
forloop
To: r-help at stat.math.ethz.ch
Message-ID: <loom.20050126T052153-333 at post.gmane.org>
Content-Type: text/plain; charset=us-ascii
Benjamin M. Osborne <Benjamin.Osborne <at> uvm.edu>
2004 Dec 04
1
AIC, AICc, and K
How can I extract K (number of parameters) from an AIC calculation, both to
report K itself and to calculate AICc? I'm aware of the conversion from AIC ->
AICc, where AICc = AIC + 2K(K+1)/(n-K-1), but not sure of how K is calculated
or how to extract that value from either an AIC or logLik calculation.
This is probably more of a basic statistics question than an R question, but I
thank
2012 Dec 05
1
loading & using Ryacas
I'm having trouble loading Ryacas. I've downloaded and extracted Ryacas
0.2-9 (also tried Ryacas ) and yacas 1.0.63, have the latest version of R
and have tried the following (this works for installing other packages):
install.packages("Ryacas")
library(Ryacas)
install.packages("yacas")
library(yacas)
and get this:
Warning message:
package ‘yacas’ is not available
2005 Apr 18
1
R-squared in summary(lm...)
What is the difference between the two R-squareds returned for a linear
regression by summary(lm...)? When might one report multiple vs. adjusted
R-squared?
Thank you,
Ben Osborne
--
Botany Department
University of Vermont
109 Carrigan Drive
Burlington, VT 05405
benjamin.osborne at uvm.edu
phone: 802-656-0297
fax: 802-656-0440
2005 Feb 16
5
scaling axes when plotting multiple data sets
1) When adding additional data sets to a plot using "plot" followed by "lines",
is there a way to automate the scaling of the axes to allow for all data sets
to fit within the plot area?
2) I attempted to solve this by setting
xlim=c(min(c(data1,data2,data3)),max(c(data1,data2,data3)))
however, there are some NAs and Infs in these data sets, and min(data1) and
max(data1) both
2004 Oct 09
1
functions
Does anyone know of a list of functions that R already "knows?" I can't seem to
find this anywhere in the help documentation. For example, I want to count the
number of occurences of a certain value in a column of a data frame: What do I
have to do to tell R to "Count?"
Thanks,
Ben Osborne
--
Botany Department
University of Vermont
109 Carrigan Drive
Burlington, VT 05405
2012 Mar 15
1
director lmtp -> smtp problem
Hi Timo & Dovecot users,
We have a 2-node director setup which front-ends for 4 nodes which share
a clustered filesystem (GFS). All nodes run Dovecot 2.0.18.
Approximately 40k users, but typically only a few thousand active at any
time.
The director nodes run sendmail, which deliver mail "locally" using LMTP
to the director, which then feeds to SMTP on the real servers (also
2004 Dec 13
1
AIC, glm, lognormal distribution
I'm attempting to do model selection with AIC, using a glm and a lognormal
distribution, but:
fit1<-glm(BA~Year,data=pdat.sp1.65.04, family=gaussian(link="log"))
## gives the same result as either of the following:
fit1<-glm(BA~Year,data=pdat.sp1.65.04, family=gaussian)
fit1<-lm(BA~Year,data=pdat.sp1.65.04)
fit1
#Coefficients:
#(Intercept) Year2004
# -1.6341