similar to: Plotting series marked with a symbol on every nth data point, preferably in ggplot...

Hello, I am trying to use cluster.overplot from package plotrix and I get an error message when I add the "away" parameter: require(plotrix) distance <- read.table("distance.txt") cmd <- cmdscale(distance) cp <- cluster.overplot(cmd, away=2) Error in if (sum(overplots) > 1) { : missing value where TRUE/FALSE needed If I don't use "away",

Hi, I would like to produce a plot with a symbol on every nth point in a time series data, like the one in the following: http://www.phon.ucl.ac.uk/home/yi/ProsodyPro/EnglishFocus.png x <- seq(-100,1000,25) plot(x,type="l") Could someone help me out with the above example? Thanks.... [[alternative HTML version deleted]]

Dear R-users, I haven't found a way in the searchable archive to overplot a contour (lines) over a surface. I have a (n,m) matrix that represents sea surface temperature that I have plotted using image.plot(), filled.contour() or image(). I would like to overplot this image with some contour lines of mixed layer depth values(same size matrix). How can I do this? Any help is appreciated,

I want to make a glm and then use predict. I have a fairly small sample (4000 cases) and I want to train on 90% and test on 10% but I want to do it in slices so I test on every 10th case and train on the others. Is there some simple way to get these elements? Stephen -- 21/10/2005 [[alternative HTML version deleted]]

Dear R users, how do I e.g. square each second element of a vector with an even number of elements? Or more generally to apply a function to every 'nth' element of a vector. I looked into the apply functions, but found no hint. For example: v <- c(1, 2, 3, 4) mysquare <- function (x) { return (x*x) } w <- applyfun(v, mysquare, 2) then w should be c(1, 4, 3, 16) Thanks for

Hello, I have 1-minute time series stock data and I'd like to calculate mean of every n-th candle data of m-days. result = c(mean of 1th data, mean of 2nd data, ...) mean of 1th data = (1th data of 2012-1-1 + 1th data of 2012-1-2 + 1th data of 2012-1-3) / 3 mean of 2nd data = (2nd data of 2012-1-1 + 2nd data of 2012-1-2 + 2nd data of 2012-1-3) / 3 ... Could you let me know the fastest

R-helpers: Is there a simple way to extract every nth element from a very long vector? [The vector I want to sample from is an object returned by lowess(). It is so long (11,628 pairs of elements) that it is causing non-R-related memory problems elsewhere. I don't see a better way other than sampling the output returned from lowess.] Thanks in advance. Barry Cooke

Hello I was wondering how I can achieve matlab style plotting in R, in the sense that matlab allows you to plot multiple sets of variables within the same x-y axes. plot in R does not seem to cater for this. I tried 'overplot' from the gplots package but this assumes different y axes for the variables. any suggestions would be very appreciated Maria [[alternative HTML version

Hi, I'm trying to plot some data (z) that is linked to lat&long coordinates (x&y). These coordinates are not however on a regular grid. I also have some shapefiles on which I would like to overlay the data. I can plot the shapefiles (country/city outlines) and overplot the data, but only using quilt.plot because I otherwise always get the error message that 'Error in

Hi, I have a data file in a KML format which is Google Earth's format for geographic data. I need to import it into a csv file . How can I do that. KML format is just like XML format .example below Which R module with deal with an OR problem (like transportation problem using geo coded data as in the example below) Regards, Ajay www.decisionstats.com - <?xml version="1.0"

Dear R Community: Recently, I have managed to plot some really useful graphs of my research data using persp(). I have even figured out how to overplot rectangular regions (corresponding to submatrices) with a different color. This is accomplished by using par(new=T). I am now searching for a way to "highlight" a set of (possibly non-contiguous) facets with a specific color,

Hello, I'm having trouble with using the alpha channel for transparency with lines with lattice levelplots. If I use transparency via the alpha argument to rgb to overplot lines on levelplot the transparent colour affects all of the region colours in the plot. Can anyone explain why the difference in region colours? #### Warning: this code attempts to create PDF files in working directory

Hi, I would like to implement MovieClip.{moveTo,lineTo,lineStyle}. I initially thought I could place an SwfdecShape inside an SwfdecSpriteMovie created by createEmptyMovieClip then call swfdec_shape_ counterparts when MovieClip.{moveTo,lineTo,lineStyle} were called. It wasn't as easy as I had thought. All the functions are highly tied to swf bitstream, even adding an SwfdecShapeMovie to

Hi everyone. The function image() seems not to be correctly plotting some matrices that I give it. (I佲檓 using R 2.1.1) The following code creates a matrix (denoted x) with 1500 rows and 3 columns, with all entries 0 or 1, and then plots the image of this matrix. cc=runif(n=1500,min=0.1,max=1.2) ccc=ceiling(cc-1) dd=runif(n=1500,min=0.1,max=1.2) ddd=ceiling(dd-1)

Dear all, I have 3 datasets all of which share the same longitude and latitude values, which I'm looking to plot onto a scattergraph. The third dataset has values which can only be either '1' or '2'. So to incorporate all three datasets onto two axes, I'm wondering if I can plot dataset1 and dataset2 as normal, but then use colour to determine whether these points are

Hi WizaRds, I'd like to overplot UK fuel consumption per quarter over the course of five years. Sounds simple enough? Unless I'm missing something, the following seems very involved for what I'm trying to do. Any suggestions on simplifications? The way I did it is awkward mainly because of the first call to plot ... but isn't this necessary, especially to set limits for the

I have been trying, unsuccessfully, to use identify() to (simply) return a list of the indices of points clicked on and overplot (with say a solid dot) each clicked-on point so that I can see where I've been. I.e. I don't want to see the indices printed on the screen; I just want the points I've already selected to be highlighted. I tried ind <-

Hi, Is there a function in R to calculate the nth root, similar to the MATLAB function NTHROOT()? Thanks, Martin Biuw [[alternative HTML version deleted]]

The following code demonstrates an annoyance with plot.lm(): library(DAAGxtras) x11(width=3.75, height=4) nihills.lm <- lm(log(time) ~ log(dist) + log(climb), data = nihills) plot(nihills.lm, which=5) OR try the following xy <- data.frame(x=c(3,1:5), y=c(-2, 1:5)) plot(lm(y ~ x, data=xy), which=5) The "Cook's distance" text overplots the label for the point with the

Hello, I have a question in regards to markov chains and transition probabilities. I am trying to figure out a way to calculate the "kth-step transition matrix" of a given matrix. Say for example I have a single step 2x2 matrix: 1 2 P= 1 .95 .05 2 .01. 99 If I were to convert this matrix to a 2-step transition probability matrix I would get: