similar to: window (x,y) co-ordinates of datapoints

I have the following data from an image analysis program, in which the x and y co-ordinates are locations of the centroids of shapes on a 2 dimensional plot. The Y co-ordinates were positive, but I changed them to negative as the resulting scatterplot was upside down (the image analysis program reads from the top of the image to the bottom, so it seems) I now need these as point pattern data, as I

Hi R users I am trying to create a spatial join between two datasets. The first data set is large and contains descriptive data including x and y co-ordinates. The second dataset is small and has been selected spatially. The only data contained within the second dataset is the x and y coordinates only i.e. no descriptive data. The aim of a join made between the two datasets is to select

Hi all I am trying to determine the distances between two datasets of x and y points. The number of points in dataset One is very small i.e. perhaps 5-10. The number of points in dataset Two is likely to be very large i.e. 20,000-30,000. My initial approach was to append the first dataset to the second and then carry out the calculation: dists <- as.matrix(dist(gis data from 2 * datasets))

Dear R-helpers, I'd like to be able to post-process contours coming from contour(). Does anyone have a version of contour() (or something similar) which will return the contour coordinates? In searching the archives I've come across a message in Nov 01 which had this on a wish-list, but I can find no later reference. With thanks, John Field Adelaide, South Australia

Is there an equivalent to the S-PLUS par()$cxy in R? Also, is it possible to get notice taken of some equivalent of \n in R when using text()? For what it is worth I am using RW-0.64.1. John Maindonald email : john.maindonald at anu.edu.au Statistical Consulting Unit, phone : (6249)3998 c/o CMA, SMS, fax : (6249)5549 John Dedman Mathematical

Hello I am using k medoids in R to generate sets of clusters for datasets through time. I can plot the individual clusters OK but what I cannot find is a way of pulling out the co-ordinates of the individual points in the cluster diagrams - none of the kmed$... info sets seems to be this. Beneath is an example of a k medoid prog using the built in US arrests dataset - this is not the data I am

Hello I am trying to input some co-ordinate sets into R of the form x,y by using lists. The command I am using is: p1 <- list(x=c(3445,563,646), y=c(234,567,456)) However the actual co-ordinate sets that I am trying to input have 305 points each and I think that the program will not accept a command that is as long as necessary. Is this so? If this is the case can you tell me how to read

Dear R-helpers, I've just started playing with getGraphicsEvent() in R, and was wondering if there is a simple way to stop this function waiting for input after a pre-defined time, instead of relying either on a non-NULL value from one of the event handlers or for a user-interrupt for it to halt (as per the R manual). The only way that I've thought of to make this work is using

Hi R-Devel, I've been working on an oscilloscope project using an Arduino microcontroller board. I found that it's quite easy to get realtime updates, e.g. 30+ frames per second, if I read data from the board in a little Rcpp library. I have to use dev.hold() and dev.flush() to keep the plot from flickering, which restricts me to the "cairo" X11 device. I'd like to be able

Hi there. I have the following graph: http://www.nabble.com/file/p10928148/map.jpg However, some datapoints occur at the same place as other datapoints and are so layered on top of each other. I would like to know if there is any possible way in which I could view those datapoints that are layered on top of each other ...maybe by rotating using latitude to show the datapoints underneath (but

Dear all, I am having an issue with displaying the dates on a plot with two ordinates (i.e. two differently scaled y-axes). Instead of dates appearing on the x-axis I am instead seeing a string of numbers (14460, 14465, 14470 and 14475). example R code: library(plotrix) x.Left <- as.Date(c('2009-08-04', '2009-08-08', '2009-08-11', '2009-08-15',

Hi Frederik, >>>>> <frederik at ofb.net> >>>>> on Tue, 7 Jun 2016 15:20:05 -0700 writes: > ... I just realized that setGraphicsEventHandlers or > getGraphicsEvent could have an 'onIdle' callback, to be > called somewhere in the polling loop of gevents.c:163 - I > think this would solve my problem #2 in a minimally

Hey all. As in general it's a bad idea to allow an event handler to generate an event, and as comments in the code seem to suggest this isn't the intention either, I was wondering about recursion in getGraphicsEvent(). In main/gevents.c, both doMouseEvent() and doKeybd() have the following line; dd->gettingEvent = FALSE; /* avoid recursive calls */ And they reset it to TRUE

Hi The current status is that I am keen for people to contribute some testing code (see https://bugs.r-project.org/bugzilla/show_bug.cgi?id=16951) There were also some getGraphicsEvent() changes/fixes suggested by Richard Bodewits (cc'ed), for which I am also seeking test code. Paul On 13/11/16 09:00, frederik at ofb.net wrote: > Hi Paul, > > Just checking in to see what the

Great. Thanks! Paul On 14/11/16 13:41, frederik at ofb.net wrote: > Hi Paul, > > Thank you, for some reason I didn't seem to get an email notification > for your bugzilla comment! > > I will try to send you something shortly. > > Frederick > > On Mon, Nov 14, 2016 at 08:55:20AM +1300, Paul Murrell wrote: >> Hi >> >> The current status is that

doKeybd() gets called in CHelpKeyIn() and NHelpKeyIn() in library/grDevices/src/devWindows.c, where the call is encapsulated in an 'if (dd->gettingEvent)' block. So the only times this code ever calls doKeybd() is when gettingEvent is in fact set. Further, it's called in two locations in X11_eventHelper(), in modules/X11/devX11.c, where the state of gettingEvent seems to be moot

Hi all, I'm writing an interactive plotting function for viewing fMRI datasets. Currently, I get keypresses using grDevices::getGraphicsEvent(). Unfortunately getGraphicsEvent() only supports the X11(type="Xlib") graphics device on Unix systems. The Xlib device doesn't support buffering (i.e. dev.hold() and dev.flush()), so redrawing the plots causes lots of flickering. Is

Hi the list, I need to use getGraphicsEvent to plot two graph. On the following toy example: - the function b is ploting two graph depending on a parameter - the function a is calling b according to some user answers. It is suppose to call b until the user press Return, but it does not. b <- function(x){ dev.off(2);dev.off(3) windows();windows(3,3,xpos=0) dev.set(2);plot(1:x)

Hi Taking a look at those patches is now on my todo list, so I may be in touch with both of you at some point to request some testing. Paul On 26/07/16 07:17, frederik at ofb.net wrote: > Dear Daniel Greenidge, > > To enable getGraphicsEvent on Cairo, you have two patches to choose > from: > > https://bugs.r-project.org/bugzilla/show_bug.cgi?id=14364 >

Thanks Frederick. Mark, if you have any examples to share, they would also be gratefully received. Paul On 14/11/16 14:53, frederik at ofb.net wrote: > Hi Paul, > > OK I tried not to make the examples too fancy. > > Please let me know what you think. They should probably be amended to > support the Windows platform, but I think that task would be much > easier for someone