similar to: Turnpoints

Good morning once more. My problem of yesterday has been addressed. Having learned a few tricks from that, I wish to ask another question in connection with that. My data is a cosmic ray data consisting of dates and counts. When I plot a graph of counts versus dates, the resultant signal shows a number of maximum and minimum points. These minimum points (turning points) are of interest to me.

Hello, To me as a beginner, every problem looks big. Below is what I was asked to do as part of a code that will solve my problem. I have used read.table to read my data into R and assigned the column names with colnames(dat)<- ... . But to go from txt<-" to the last " at the bottom of the table below is what I am unable to do. Could anybody please tell me how to type or arrive at

Hello, I'm trying to get a few turnpoints for a financial time series. There is a function in pastecs that does that. However, I get a large number of turnpoints: library(pastecs) data(EuStockMarkets) dax <-EuStockMarkets[,1] plot(dax) turnp <-turnpoints(dax) summary(turnp) #gives 925 peaks/pits!!! How can specify to get only 30 turnpoints? Second question: the extract function

Tom Blackwell wrote: >... >I summarized this to myself as "computed subscripts need explicit >rounding in R, but not in S". Here's the sample code which gave >me different results with R than with Splus. I no longer have >Splus available, so I can't check it again. >look <- (10 * seq(14)) - 76 >chk.1 <- seq(1420)[ 10 * (73.1 + look) ] #

Happy New Year, r-helpers! I am using lowess to smooth a scatter plot, xx<-lowess(xinput,f=.04) #defaults for other args followed by turnpoints(xx$y) #defaults for other args I plot the smoothed result as well as turnpoints (using yy$tppos) on top of raw data plot. Result is exactly as expected, graphically. For another purpose, I calcuate the difference between turnpoints (representing

Hi I have a large dataset which follows a multimodal distribution. And I would like to identify the maxima. As the data is obtained from a stochastic simulation, not all maxima in the data are "real maxima of the dirstribution" but rather small random fluctuations. Unfortunately, it is not possible for me to run more simulations to smooth the obtained distribution. What I am doing

Good morning. I wish to plot two data on the same axis. I tried plot(x,y, type = "l") for the first and tried to use lines or points(x,y, lty = 2, col = 4) to add or plot the second data on alongside the first. However, what I got was not encouraging. I have attached the two data and would be pleased if anybody could be of help. Thank you Best regards Ogbos -------------- next part

Hello, I just notice this: > x <- c(1:4,0:5, 4, 11) > library(pastecs) Loading required package: boot > tp <- turnpoints(x) > extract(tp, no.tp = FALSE, peak = TRUE, pit = FALSE) [1] FALSE FALSE FALSE TRUE FALSE FALSE FALSE FALSE FALSE TRUE FALSE FALSE Warning message: arguments after the first two are ignored in: UseMethod("extract", e, n, ...) >

Hi, Here's the problem I ran into: the gmp package has a method for apply() so it masks the base::apply function. With gmp installed, I tried to run the function turnpoints() from the pastecs package. It fails because it calls apply() internally, like this: apply(mymatrix,1,max,na.rm=TRUE) , but the code in the gmp package which sets up the operator overload for apply() strictly

Hi I just installed the pastecs package and I am wondering: is there an english (or german) translation of the file pastecs.pdf? If not, is there an explanation somewhere of the object of type 'turnpoints' as a result of turnpoints(), especially the "info" field? Thanks, Rainer -- NEW EMAIL ADDRESS AND ADDRESS: Rainer.Krug at uct.ac.za RKrug at sun.ac.za WILL BE

I have a vector with about 100.000 values representing a quite regular function (sinusoid like). I would like to find all local maxima of this function (should be about 4000). Is there a native routine for R? Thanks in advance Eryk. -- _|_ \|/ \|/ Eryk Witold Wolski tel :0049-(0)30-8413-1543 w w ?v? 'v? \'v'/ MPI Moleculare Genetik fax :0049-(0)30-8413-1139 |

Hi all a week ago, I posted a newbie question in data smoothing & maximum-extraction with R. I got quite a lot of response, but I'm still kinda stuck with it... I'll restate the problem : i got a datafile with 2400 measuerements (every 250msec) of a CO2 measurement device, capturing the breath of a subject. I uploaded such a sample here :

Hi, I was wondering if anyone knows of a package that contains the ability for peak/valley detection. Here is an example of what I'm looking for, only problem is that it's written in Matlab. http://www.billauer.co.il/peakdet.html Thanks for any help in advance. -Joe

Hi Is there a function which determines the location, i.e., index of the all minimums or maximums of a numeric vector. Which.min(x) only finds the (first) of such. > x <- c(1:4,0:5, 4, 11) > x [1] 1 2 3 4 0 1 2 3 4 5 4 11 > which.min(x) [1] 5 > which.max(x) [1] 11 > but I need which.min(x) to be 5 11 which.max(x) to be 4 10

Hello, Thank you to all those great folks that have helped me in the past (especially Dennis Murphy). I have a new challenge. I often generate time-series data sets that look like the one below, with a variable ("Phase") which has a series of flat-topped peaks (sample data below with 5 "peaks"). I would like to calculate the phase value for each peak. It would be great to

hi, my boxes: RH 8.0 with samba2.2.6-2 and cups 1.1.15-10 samba runs ok and cups runs ok.I putted Adobe Postscript Printer in /usr/share/cups/drivers. And when I want to export my Cups Printer with cupsaddsmb, this what it happens: [root@bouffon sbin]# cupsaddsmb -H bouffon -U DOMAINNAME\\root -h bouffon -v infolpPassword for DOMAINNAME\root required to access bouffon via SAMBA: Running