[R] tutors for time series....NYC
I'm just getting started with R, having a lot of original work on modeling and exploring the shapes of time series to transfer from a graphic LISP environment. Is there anyone in NYC that might be a good tutor for me? Phil Henshaw .·´ ¯ `·. ~~~ 680 Ft. Washington Ave NY NY 10040 tel: 212-795-4844 e-mail: [EMAIL PROTECTED] explorations: www.synapse9.com http://www.synapse9.com/ [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Grouping columns in a data frame based on the values of a column
--- [EMAIL PROTECTED] wrote:
Dear R users,
This is a trivial question, there might even be an R
function for it, but I have
to do it many times and wonder if there is an
efficient for it.
Suppose we have a data frame like this:
d - data.frame(x=sample(seq(0.1:1, by=0.01),
size=100, replace=TRUE),
y=rnorm(100, 0.2, 0.6))
and want to have the average of y for a given
interval of x, for example
mean(y)[0x0.1]. Is there a simple way of doing
this or I need to improvise?
I don't think so. I don't think there is any value of
x 0.1 in the dataframe.
However if we change the data.frame to read
d - data.frame(x=sample(seq(0.01:1, by=0.01),
size=100, replace=TRUE),
y=rnorm(100, 0.2, 0.6))
dd - subset(d, x 0 x 0.1)
mean(dd[,2])
seems to work.
or if you do this a lot you might want to write it as
a funtion.
sub.mean - function (frame, first.col, second.col,
upper, lower) {
dd - subset(frame, first.col lower first.col
upper)
mean(frame[,2])
}
sub.mean(d, 1,2,0.1,0)
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[R] dotplot/Dotplot: connecting points within factor level across time
For each level of the factor in dotplot, I have time points I'd like to connect with a line. In the example below, 'x' represents a starting time and 'd' a duration, and I wish to connect 'x' to 'x+d'. Ordinarily I would use Dotplot from hmisc for this, but I have not been able to find a time class that Dotplot will allow. I can get lattice dotplot to put the points up, but I've not figured out how to connect them. Any suggestions? require(lattice) z-data.frame(y=factor(letters), x=structure(1:26,class=c(POSIXt,POSIXct),tzone=), d=runif(26)) # this puts the points, but does not connect them p-dotplot(y~x+I(x+d), data=z, scales=list(x=list(format=%M:%S)) ) zh-z zh$x-as.numeric(zh$x) require(hmisc) # this connects them, but at the expense of the time info ph-Dotplot(y~Cbind(x,x,x+d), data=zh, pch= ) Thanks, Ben __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] how to rescale the limits of yaxis rather than using the data range by default?
Dear Lister, plot() is using the data range as the default limits of yaxis. Is there any way I can change the limits? I just look at the help of plot() and par() and couldn't find answers. Thanks. -- WenSui Liu (http://spaces.msn.com/statcompute/blog) Senior Decision Support Analyst Health Policy and Clinical Effectiveness Cincinnati Children Hospital Medical Center __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to rescale the limits of yaxis rather than using the data range by default?
HI, Peter, It is exactly what I want. Thank you so much! wensui On 9/16/06, Peter Konings [EMAIL PROTECTED] wrote: Hi, I'm not sure I understand your question correctly, but does the ylim option of plot do what you want? HTH Peter. On 9/16/06, Wensui Liu [EMAIL PROTECTED] wrote: Dear Lister, plot() is using the data range as the default limits of yaxis. Is there any way I can change the limits? I just look at the help of plot() and par() and couldn't find answers. Thanks. -- WenSui Liu (http://spaces.msn.com/statcompute/blog) Senior Decision Support Analyst Health Policy and Clinical Effectiveness Cincinnati Children Hospital Medical Center __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- WenSui Liu (http://spaces.msn.com/statcompute/blog) Senior Decision Support Analyst Health Policy and Clinical Effectiveness Cincinnati Children Hospital Medical Center __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to rescale the limits of yaxis rather than using the data range by default?
If you look at ?plot.default you should find that the way to do this is to use the ylim argument. On 16/09/06, Wensui Liu [EMAIL PROTECTED] wrote: Dear Lister, plot() is using the data range as the default limits of yaxis. Is there any way I can change the limits? I just look at the help of plot() and par() and couldn't find answers. Thanks. -- WenSui Liu (http://spaces.msn.com/statcompute/blog) Senior Decision Support Analyst Health Policy and Clinical Effectiveness Cincinnati Children Hospital Medical Center __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Error Message Documentation
Hello,
I am new to R, and trying to work with it. I have a couple of quick
questions. First, I made a program and got the following error message.
--
Error in if (DatMdFile$Time.Value[NmRecord] VBinTimesMinTop[NmCounter]) {
:
missing value where TRUE/FALSE needed
In addition: Warning message:
not meaningful for factors in: Ops.factor(DatMdFile$Time.Value[NmRecord],
VBinTimesMinTop[NmCounter])
-
I noticed that one of the values had decimal places, while the other didn't,
so the comparison would be 11.00 10
I don't know if that might have anything to do with my problem.
Anyway, I don't have much idea what the error means, and I don't know how to
check what data type the different vectors are.
I was wondering if anyone could help me out, and also, I was wondering if
there is any error documentation (stuff that tells what the error means.)
Thanks!
- cjkogan111
--
View this message in context:
http://www.nabble.com/Error-Message-Documentation-tf2283899.html#a6344607
Sent from the R help forum at Nabble.com.
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] dotplot/Dotplot: connecting points within factor level across time
Try this: print(p) trellis.focus(panel, 1, 1) with(z, panel.segments(x, as.numeric(y), x+d, as.numeric(y))) trellis.unfocus() On 9/16/06, Benjamin Tyner [EMAIL PROTECTED] wrote: For each level of the factor in dotplot, I have time points I'd like to connect with a line. In the example below, 'x' represents a starting time and 'd' a duration, and I wish to connect 'x' to 'x+d'. Ordinarily I would use Dotplot from hmisc for this, but I have not been able to find a time class that Dotplot will allow. I can get lattice dotplot to put the points up, but I've not figured out how to connect them. Any suggestions? require(lattice) z-data.frame(y=factor(letters), x=structure(1:26,class=c(POSIXt,POSIXct),tzone=), d=runif(26)) # this puts the points, but does not connect them p-dotplot(y~x+I(x+d), data=z, scales=list(x=list(format=%M:%S)) ) zh-z zh$x-as.numeric(zh$x) require(hmisc) # this connects them, but at the expense of the time info ph-Dotplot(y~Cbind(x,x,x+d), data=zh, pch= ) Thanks, Ben __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] using table in R
Hi there, I have a dataframe whose elements are numbers or characters. I want to extract the frequencies of each elements in the dataframe. For example, d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2)) What I want is first what are the elements in the data (1,2,3 here) and second what are their frequencies (1,1,2 respectively). How to use table to extract these two pieces of information? I played with table but couldn't extract the information. Please assume that we do not know how many elements in the dataframe a priori. Thanks a lot! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] using table in R
Here is one way; you create a vector of the data in the dataframe with 'unlist' and then use table: d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2)) d V1 V2 1 1 3 2 2 3 table(unlist(d)) 1 2 3 1 1 2 On 9/16/06, Bingshan Li [EMAIL PROTECTED] wrote: Hi there, I have a dataframe whose elements are numbers or characters. I want to extract the frequencies of each elements in the dataframe. For example, d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2)) What I want is first what are the elements in the data (1,2,3 here) and second what are their frequencies (1,1,2 respectively). How to use table to extract these two pieces of information? I played with table but couldn't extract the information. Please assume that we do not know how many elements in the dataframe a priori. Thanks a lot! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Any other R users in Philadelphia?
I'm still new to R and wouldn't mind meeting other R users, at any level of experience. Regards, Mitch Maltenfort Thomas Jefferson University -- I can answer any question. I don't know is an answer. I don't know yet is a better answer. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] using table in R
Hi Jim, This is the way to get the frequencies. But what I want is to store the elements in one vector and their frequencies in another vector. My problem is that when I call table to return the frequency table, I do not know how to extract these two vectors. I tried table(...)$dinnames and it did not work. It returned NULL. Thanks! --- jim holtman [EMAIL PROTECTED] wrote: Here is one way; you create a vector of the data in the dataframe with 'unlist' and then use table: d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2)) d V1 V2 1 1 3 2 2 3 table(unlist(d)) 1 2 3 1 1 2 On 9/16/06, Bingshan Li [EMAIL PROTECTED] wrote: Hi there, I have a dataframe whose elements are numbers or characters. I want to extract the frequencies of each elements in the dataframe. For example, d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2)) What I want is first what are the elements in the data (1,2,3 here) and second what are their frequencies (1,1,2 respectively). How to use table to extract these two pieces of information? I played with table but couldn't extract the information. Please assume that we do not know how many elements in the dataframe a priori. Thanks a lot! __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Periodogram of Schuster
Check out: http://cran.r-project.org/doc/contrib/Ricci-refcard-ts.pdf On 9/15/06, Guillaume Blanchet [EMAIL PROTECTED] wrote: Dear All, Is there a function in R which can do a periodogram of Schuster ? Thanks in advance ! Guillaume Blanchet __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
