search for: lowess

As I've mentioned a number of times. I find it very useful to have lowess() become a generic function so that a lowess.formula() can be defined. Below is a patch that makes both changes, as well as updating the corresponding help documentation. Gregory R. Warnes Manager, Non-Clinical Statistics Pfizer Global Research and Development Tel: 860-715-3536 ? DESCRIPTION ? M...

I don't really see the point. lowess() is a two-dimensional smoother only so the main point would only be to allow lowess(y ~ x, dat) instead of lowess(dat$x, dat$y). Bill V. -----Original Message----- From: r-devel-bounces@stat.math.ethz.ch [mailto:r-devel-bounces@stat.math.ethz.ch] On Behalf Of Warnes, Gregory R Sent: Wednesday,...

The lowess() help page refers to documentation in "src/appl/lowess.doc". This was moved to "src/library/stats/src/lowess.doc" in 2007. This patch fixes it: Index: src/library/stats/man/lowess.Rd =================================================================== --- src/library/stats...

Hi, A lowess method is defined in our package for one of our S4 classes. To explicitely define the generic this is being used if (!isGeneric("lowess")) setGeneric("lowess", useAsDefault = lowess) This works fine for many other methods inherited from various R packages. In this case a war...

Hi, all, I want to use lowess(x, y) where x and y are vectors of length of 4000+. In fact, x and y are log of some vectors. So, some of the elements are NaN. lowess() can not take away those elements then do the fitting. It will give the error message and do nothing. 1. Can anybody tell me how to get rid of those NaN's an...

Colleagues ---------------------------------- System info: R version rw1022 on NT ESS v. 5.1.18 using emacs ver. 20.4 ---------------------------------- I would like to access the residuals from a lowess fit (function lowess() ) as an aid to assessing whether I am over-smoothing or under-smoothing a dataset (as in Cleveland's book "Visualizing data", section 3.3) Unless I misunderstand, the lowess function only returns the independent variable and the smoothed dependent variable,...

...Murdoch On 5/23/2005 2:35 PM, pelzc at ohsu.edu wrote: > Full_Name: Carl Pelz > Version: 2.1.0 & 2.0.1 > OS: Windows 2000 > Submission from: (NULL) (137.53.64.158) > > > # Paste this all into an R session for a graphical demonstration of BUG... > # I?ve found a bug in lowess in R versions 2.0.1 & 2.1.0 (Windows binary > versions). > # Running on Windows 2000 system. > # Someone noticed a similar problem and reported it under ID 4459. > > # Data to reproduce... > R <- c(3.0, 3.5, 4.5, 5.0, 10.0) > T <- R > T <- 1.5*T + 0.1*(T^2)...

I'm using this code to plot a smoothed line. These two columns of data really represent 4 groups and I'd like to plot a separate line for each group but have them all in the same plot. The R-Docs for lowess do not seem to indicate some type of "GROUPS=var_name" option. What would be the syntax for this? plot(AWGT ~ lipid ) lines(lowess(lipid , AWGT, f=.8)) -- Dean Sonneborn, MS Programmer Analyst Department of Public Health Sciences University of California, Davis (530) 754-9516

Hi there, I'm plotting some glass RI values just by plotting plot(x) then I put on my lowess smoother lines(lowess(x)) now I want to put on some 95% Confidence Interval bands of the lowess smoother, but don't know how?? Thanks -- Gareth Campbell PhD Candidate The University of Auckland P +649 815 3670 M +6421 256 3511 E gareth.campbell@esr.cri.nz gcam032@gmail.com [[alternativ...

hi: apologies for taking up everyone's time. my problem is probably documented somewhere, but I again cannot find it. (which reminds me: I cannot find a search engine that allows me to search the archives of this very useful mailing list.) * it seems that lines(lowess()) fails to plot certain line segments. (and, what does it do at the x-min and x-max of a data set?) Rather than speculate what causes it, I am including a short R snippet and a short data set that demonstrates it. is this a bug or a feature? * it would be nice if lowess was a little better...

x <- c(0,7,8,14,15,120,242) y <- c(122,128,130,158,110,110,92) lowess(x,y) $x [1] 0 7 8 14 15 120 242 $y [1] 122.0000 128.0000 132.2857 158.0000 110.0000 -4930.0000 110.0000 R version 2.2.1, 2005-12-20, i486-pc-linux-gnu attached base packages: [1] "methods" "stats" "graphics" "grDevices" "...

Hello Masters, I run the loess() function to obtain local weighted regressions, given lowess() can't handle NAs, but I don't improve significantly my situation......, actually loess() performance leave me much puzzled.... I attach my easy experiment below #------SCRIPT---------------------------------------------- #I explore the functionalities of lowess() & loess() #because...

Dear Colleagues: I need to make a graphic that uses the Nimbus rather than Helvetica font family so that the font can be embedded in the encapsulated postscript file. This is to satisfy a requirement from a journal for electronic submission of figures. I do the following: postscript('lowess.eps', onefile=FALSE, pointsize=18, horizontal=FALSE, family='NimbusSan') spar(mfrow=c(3,2)) . . . dev.off() At this point lowess.eps looks fine. When I run: embedFonts('lowess.eps') or embedFonts('lowess.eps', options='-sPAPERSIZE=letter') the figu...

Hi, I have a scatter plot of the variables GNI and Lifeexp (Gross National Income and Life Expectancy, both metric). So I plotted them and I want to add a regression line and a lowess line. I use lowess and not loess because I have missing values. My code: plot(GNI,Lifeexp) abline(lm(Lifeexp~GNI), col="red") y.loess<-loess(Lifeexp~GNI,na. action = na.exclude) y.predict<-predict(y.loess) lines(GNI,y.predict) But when I do this (I get no error messages) the plot lo...

Can anyone explain to me what this error message means, why I'm getting it, and how to fix it? lines(lowess(xdat, ydat, f=.5), col=3) Error: NAs in foreign function call (arg 1) ______________________________________________________________________ Stuart Luppescu -=-=- University of Chicago ºÍʸ ¤ÈÃÒÆàÈþ¤ÎÉã(EUC) -=-=- s-luppescu at uchicago.edu http://www.consortium-chicago.org/people/sl/sl....

Hi All, I've been providing a generic version of lowess() in my 'gregmisc' library, along with a 'lowess.formula' and 'lowess.default'. Can/should these be moved into base? -Greg LEGAL NOTICE Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) onl...

...for the "unseen" x value as per the board. Then since the tutorial had ended, I thought I'd get a little bit fancy. I created some sample data where the x values were uniform random between 0 and 8, and the y value was x^2 plus some gaussian noise. I then plotted the raw data, and a lowess() curve, explaining to the students that the lowess() curve was a more sophisticated method than we'd covered in class (I had mentioned locally weighted regression during the lecture). Finally I plotted the true y=x^2 line so that we could compare the lowess() curve to the true curve. The stude...

Greetings. These days I find myself writing a lot of functions to handle routine things. One of these is a function to create a scatterplot of variables and draw a lowessed line so I can get some idea if there's any relationship between them. lowessed.plot <- function(x, y) { plot(x, y) lines(lowess(x, y)) } However, there's a slight problem: the plot axes come out labeled "x" and "y", which isn't what I want. I want the plo...

I am trying to change the attributes of the lowess lines fit to an xyplot command, but have been unsuccessful in my search of the online help. Right now, both the points and lowess line come out in the same color (blue). I am unsure how I can change the properties of the lowess line separately. xyplot ( SnowLineElevation ~ Year | Model, data...

code: x <- rnorm(32) y <- rnorm(32) plot(x,y) lines(lowess(x,y),col='red') Now I need to sample the lowess function into matrix where one series will be X and other will be values of lowess at particular X. -- View this message in context: http://r.789695.n4.nabble.com/how-to-sample-lowess-loess-into-matrix-tp3053458p3053458.html Sent from the R...