similar to: convert pixels into axis coordinates in R

Dear all, I'm working with satellite images in R and plotting them via the code below. I was wondering whether coordinates (spatial["x"], spatial["y"]) are used as centre coordinates of the pixels in the GRID? In this script; spatial["x"] & spatial["y"] are the centre coordinates of the satellite image pixels. I'm asking this because some

Dear friends, The user coordiante system in the R graphics is easy to understand as it simply corresponds to the range of values on the axes of the plot. However, sometimes, we want to kown the coordinates of a region in other system, e.g., the normal coordinate system whose origin is the the upper-left cornner of the drawing area which is used to set the hot regions in the HTML image maps.

Dear R Users, I'm able to display a legend using the following code: > legend("topright", c("Simulation", "Observation"), fill=2:3, bty="n") However, this causes the legend to be positioned too close to the bars in my barplot. I'd like to move the legend up slightly. I have been trying to determine the necessary values by trial and error to do

Hi all, I have the data from the posterior distribution for some parameter. I want to find the 95% credible interval. I think "t.test(data)" is only for the confidence interval. I did not fine function for the Bayesian credible interval. Could some one suggest me? Thanks [[alternative HTML version deleted]]

Hi again, this is a follow-up of my previous post : I've noticed that > attr(first.list[[1]]$size.ecdf,"call") gives ecdf(test.moms[, "m.pxs"]) and that there is no "test.moms" field in my records (a local variable named test.moms was used inside a function, but it was stored under another name in the list, outside the function) May this be the answer (and

Greetings. I'm trying to understand a problem on a Dell Laptop. Details below, also uploaded the R working example that I pasted below. http://pj.freefaculty.org/scraps/testSymbols.R > sessionInfo() R version 2.15.1 (2012-06-22) Platform: x86_64-pc-linux-gnu (64-bit) locale: [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 [5]

Hello, I am trying to wrap my head around the coordinates systems associated with the layout() function ...with the end goal of simply drawing a decorative line in the upper margin of my figure, which is composed of three plots. My output is defined as this: ---------------------------------------------------------------------------- postscript("out.ps", horizontal=FALSE,

Short form: How do I transform the output of grid.locator() (or grid.locator(unit='npc')) to the native (or npc) coordinates of a viewport other than the top-level viewport? Thanks in advance. -Ben Long form: I would like the user to be able to click anywhere on the R graphics window. I would then like to figure out which leaf viewport the user clicked in and compute the native

Hello I wonder if anybody can help, I am using the package adehabitatHR to estimate the potential distribution of a species using the command "domain" In the example given in the AdehabitatHS manual a map containing elevation information is loaded (class= spatial pixels data frame) as well as the GPS points of the animals being tracked, these are then plotted on each other and

Hello, I have created a spatial map of temperature over an area thanks to interpolation. So I have temperature data everywhere on my map. My question is: how can I find temperature data on my map for a specific location according to coordinates? For this, I have a data frame containing 4 columns: "x" for longitude, "y" for latitude, "z" for altitude" and

Hello R people Is there a way to get the coordinates of the text region (coordinates of the four corners for example) when using the text function? I'm looking for a way that does not make use of interactive function like locator. My goal is to determine the position of other structures in a graphic so that they don't overlap with the text. Thanks Francois Rousseu

https://bugs.freedesktop.org/show_bug.cgi?id=97568 Bug ID: 97568 Summary: read pixels of MSAAx8 surface stretched horizontally/vertically Product: Mesa Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium

In a raster asc object, I'd like to take the positions (x and y coordinates) for a given "pixel" ID. Any idea about how to do this? _______________ Paulo E. Cardoso [[alternative HTML version deleted]]

locator(n=1) returns the coordinates of the position of the mouse. But you have to click the left button of the mouse. How can I determine the mouse position without any click? Is it possible to extend locator in a way that locator(n=0) outputs the coordinates at once, without any click event? TclTk allows us to define very nice animations and demonstrations, see for example: demo(tkdensity).

Dear R-list, I have a plot with y-axis corresponding to wind measurments and x-axis with date-time information. When I want to identify some extrem wind events in the wind-curve, I use locator() to get the exact date-information, by clicking in the points in graph I?m interested in. I get in the R console the x and y coordinates. The x coordinates are not in a POSIXct format, I guess R is

Hi all R users I would like to know how acess the coordinates of the ECDF object. I look for the example, in this part: ###################### print(ls.Fn12 <- ls(env= environment(Fn12))) ###################### but I do not know to extract the Y coordinate and put it in other variable. My objective is to make a plot and identify the points with labels. ############# Example by

OK. I've played with this for long enough now. Any chance of some help? In order to solve some problems with an application I went through the process of converting the VGASYS and SSERIFE fonts. (I'll make a couple of additions to the docs when I get a moment!). However when I go to select the MS Sans Serif fonts from the standard "font choice dialog" thingy the available

Hi all, I want to draw a line with the values of x marked in X axis. I tried with x <- c(0,6,12,18,24,30) #coordinates of points x y <- c(2,5,7,5,7,16) #coordinates of points y plot(x,type="n",xlab="Months",ylab="Y values",main="main",ylim=c(0,16),xlim=c(0,30)) lines(x,y) The graph shows by default an increment of the sequence in x axis that

Dear R helpers: Let's say I have some data X, X <- runif(1000, 1, 10000000000) pdf('X.pdf', width=100,height=5) hist(X, breaks=1000) dev.off() I find that, on x-axis the coordinates are 0e+00, 2e+09, 4e+09, 6e+09, 8e+09, 1e+10. Only five numbers, which is too sparse in a 100x5 pdf file. I want the x-axis coordinates to become more dense, e.g.

Hi, I have a numeric pixel image which I would like to divide into factors for analysis in Spatstat. I have found that I can use cut.im() function to divide the range of pixel values into a series of equal length intervals (e.g. if my pixels values range from 0 to 60, cut.im(X.im,breaks=2) will produce two factors one containing pixel values 0-30 and one containing pixel values of 30 - 60, or