Displaying 20 results from an estimated 700 matches similar to: "FW: R and read.irts"
2005 Dec 29
1
R and read.irts
I thought r-help let you
attach asci files but
I don't think it does now
so below is a sample of my data set.
Thanks again.
09:40:08.5238,67.00,33
09:40:09.1968,67.00,2
09:40:09.7945,67.00,2
09:40:09.7975,67.00,2
09:40:09.8318,66.99,-3
09:40:17.6335,66.95,3
09:41:09.3393,66.95,6
09:41:11.1482,66.95,-1
09:42:07.4552,66.90,-5
09:42:12.5823,66.85,-5
09:42:14.4329,66.80,-2
2004 Jul 23
1
ts to irts
Hi R-list,
I'm working with irregular time series (time series of climate data,
daily data 365/6 days a year) and would like to create regular time
series from them ( irts
e.g. Rain <-
irts(as.POSIXct(Climate[,1]),Climate[,5])
to ts
e.g. test <- ts(x, start=c(1997,1), frequency=365) )
such that I can find where the gaps (lacking temperature data, ...) are
and try
2005 Oct 19
2
Filter design in R?
Dr. Williams,
I ran across your inquiry on one of the R-help mailing lists regarding
digital filter design and implementation. I found no response to your
email in the archives and was wondering if you were able to find anything.
Thanks,
Israel
--
Israel Christie, Ph.D.
Email: ichristie at gmail.com
Phone: 865.766.0214
Mobile: 865.406.4615
2006 Jan 04
1
R newbie configuration
I think I did enough reading on my
Own about startup ( part of the morning
And most of this afternoon )
to not feel uncomfortable asking
for confirmation of my understanding of this startup stuff.
Obviously, the startup process is more complicated
Than below but, for my R newbie purposes,
It seems like I can think of the startup process as follows :
Suppose my home directory =
2006 Jan 09
6
R newbie example code question
Sometimes I print out a package
and read about it and there
are sometimes nice examples
that I would like to run myself.
Is there a way to bring them
into R from the package or
are they only meant to be typed
in manually ? If manual is the
only way, that's fine. I was
just checking whether there was
a quicker way. Thanks.
Mark
2008 Jun 25
0
Memory allocation failed: Copying Node
Following code bugs with "Memory allocation failed: Copying Node" error after
parsing n thousand files. I have included the main code(below) and
functions(after the main code).
I am not sure which lines are causing the copying Node which results in
memory failure. Please advise.
#Beginning of Code
for(i in 1:nrow(newFile)) {
if(i%%3000 == 0) gc()
2011 Sep 12
1
findFreqTerms vs minDocFreq in Package 'tm'
I am using 'tm' package for text mining and facing an issue with finding the
frequently occuring terms. From the definition it appears that findFreqTerms
and minDocFreq are equivalent commands and both tries to identify the
documents with terms appearing more than a specified threshold. However, I
am getting drastically different results with both. I have given the results
from both the
2006 Jan 11
2
a series of 1's and -1's
Does anyone know of a simple test
in any R package that given
a series of negative ones and positive
ones ( no other values are possible in the series )
returns a test of whether the series is random or not.
( a test at each point would be good but
I can use the apply function to implement
that ) ?
thanks.
2006 Jan 03
5
newbie R question
I'm sorry to bother everyone with a stupid
question but, when I am at an R prompt in Windows,
is there a way to see what packages
you already have installed from the R site so
that you can just do library(name_of_package)
and it will work.
I've looked at help etc but I can't find
a command like this. Maybe there
isn't one which is fine.
2003 Feb 08
5
MP3/Vorbis comparision
In my efforts to convince people to hear how good Vorbis is when compared to MP3, I'm gonna be encoding tracks from my CD collection to both formats, then writing them to audio CD, so people don't have to install extra software to hear the difference.
Has anyone got some suggested specs for the options for MP3 encoding when using CDex or Chun-Yu's MP3 writer for winamp (preferably in
2002 Oct 09
19
high frequencies response
Hi there
In the past, i have used lame to encode high quality mp3-files
(vbr 1, bitrate ~ 192kbit). I tend to switch to ogg with Quality 4
or 5, but i noticed, that many ogg-files tend to produce too much
high frequencies response. In many cases, this is very noticeable.
For my opinion, i cannot accept this worse frequence reponse.
I have used latest version of ogg (OggEnc v1.0, precompiled
2002 Oct 09
19
high frequencies response
Hi there
In the past, i have used lame to encode high quality mp3-files
(vbr 1, bitrate ~ 192kbit). I tend to switch to ogg with Quality 4
or 5, but i noticed, that many ogg-files tend to produce too much
high frequencies response. In many cases, this is very noticeable.
For my opinion, i cannot accept this worse frequence reponse.
I have used latest version of ogg (OggEnc v1.0, precompiled
2002 Feb 11
2
Time Series ts() Objects
Hi,
Is it possible to create a ts() object, whose data is daily based BUT
measured only on working days?
In other words, suppose I have a data set with 255 observations, measured
from 29 June 1959 to 30 June 1960. How would I create such a data? I
tried something like:
ts(c(...), start(1959, 180))
but I'm not sure what to use for frequency. In other words I don't know
how to
2009 Aug 18
1
aggregating values at discreet irregular time intervals into hourly values
Hello R users,
I'm a newby to R (and programming software at large) and I would need some help to sum up event data at discreet time and irregular time interval into a hourly frequency.
Here is an example of my time series frame (irregular time-serie object - irts in the tseries package):
time value
2008-12-19 19:11:03 GMT 1
2008-12-19 19:12:00 GMT 0
2008-12-19
2003 Jun 06
3
irregular time-series
I make quite a lot of use of irregular time-series, and had already spent a
bit of time writing an 'its' class when the 'irts' class was released via
the package 'tseries'.
I have experimented with the 'irts' class, and have some practical issues
with its use. In some applications of irregular time-series (in my case
these are financial and econometric) there are
2005 Oct 03
2
grob questions
If I run the following example from:
http://www.stat.auckland.ac.nz/~paul/grid/doc/grobs.pdf
> grid.newpage()
> pushViewport(viewport(w = 0.5, h = 0.5))
> myplot <- gTree(name = "myplot", children = gList(rectGrob(name = "box",
+ gp = gpar(col = "grey")), xaxisGrob(name = "xaxis")))
> grid.draw(myplot)
>
2011 Aug 18
1
Where are the ticks on grid.xaxis?
Hi R list,
I like the default ticks that are set up using grid.xaxis() or grid.yaxis()
with no arguments. Finding good values for the 'at' argument is usually not
a trivial task; the default behavior of these functions seems to work well.
The problem with this strategy is that I cannot figure out how to "recover"
the positions of these ticks when you do NOT specify the
2012 Mar 10
2
Window on a vector
Dear all,
I have a large vector (lets call it myVector) and I want to plot its value with the logic below
yaxis<-myVector[1]
yaxis<-c(xaxis,mean(myvector[2:3])
yaxis<-c(xaxis,mean(myvector[4:8])
yaxis<c(xaxis,mean(myvector[9:16])
yaxis<c(xaxis,mean(myvector[17:32])
this has to stop when the new ..... yaxis<c(xaxis,mean(myvector[1024:2048]) will not find the correspondent number
2008 Jul 09
1
childNames for xaxis grob (grid package)
Dear list,
Can someone explain why the childNames below
gives
character(0)
instead of the (canonical) names of the children grobs
of the xaxis gTree ?
[1] "major" "ticks" "labels"
Many thanks in advance,
Tobias
### minimal example code ###
library(grid)
pushViewport(plotViewport(c(5,4,4,2)))
pushViewport(dataViewport(1:5, 1:5))
grid.points(1:5, 1:5)
2010 Mar 03
1
help R IRT simulation
hello R,
This is about simulation in psychomtrics in IRT in R. I want to simulate b
parameters(item difficulty) with moments of fixed values of mean, st.d,
skewness and kurtosis. Is there any specific IRT package in R with those
functions to control those moments? I have seen other programs that can
control mean and st.d but not skewness and kurtosis.
Thank you,
helen L
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