Displaying 20 results from an estimated 1000 matches similar to: "window (x,y) co-ordinates of datapoints"
2012 May 03
1
Creating a point pattern with cartesian co-ordinates
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
2008 May 06
3
Spatial join between two datasets using x and y co-ordinates
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
2008 Mar 12
4
Distances between two datasets of x and y co-ordinates
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))
2003 Jun 27
2
Returning contour co-ordinates
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
1999 May 17
1
Character height & width in user co-ordinates
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
2002 May 08
3
Inputting Co-ordinates
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
2011 Dec 16
2
Event handling in R
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
2016 Jun 07
2
getGraphicsEvent on X11 and event queuing
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
2009 Sep 10
1
Issue displaying DATES on a plot with two ordinates
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',
2007 Jun 02
4
Datapoints underneath datapoints Problem
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
2016 Jun 09
3
getGraphicsEvent on X11 and event queuing
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
2016 Sep 17
2
Handlers in setGraphicsEventHandlers() can recursively call getGraphicsEvent(). Intended behavior?
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
2016 Nov 13
4
getGraphicsEvent() alternative for cairo graphics device?
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
2016 Nov 14
2
getGraphicsEvent() alternative for cairo graphics device?
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
2016 Sep 21
1
Handlers in setGraphicsEventHandlers() can recursively call getGraphicsEvent(). Intended behavior?
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
2016 Jul 25
2
getGraphicsEvent() alternative for cairo graphics device?
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
2008 Apr 13
1
getGraphicsEvent plotting two graph
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)
2016 Jul 25
2
getGraphicsEvent() alternative for cairo graphics device?
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
>
2016 Nov 14
2
getGraphicsEvent() alternative for cairo graphics device?
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
2010 Jun 07
2
graphical representation of a correlation between 3 variables (~30 datapoints)
Dear Ms and Mr R,
I am seeking a visually appealing presentation of 3 variables (~30
datapoints) that are correlated and that should to into the same direction.
The objective is to show that they do go in the same direction and what
differences there might be while also giving an idea of the values of the
variables. I had done this with simple bargraphs for 6 datapoints in the
past, but for