similar to: polygon border colors

We are trying to implement Breiman's one standard deviation pruning rule for tree models. I have run into a problem with predict.tree. This bit of R code, a skeleton for a cross-validation process, library (tree) dat <- data.frame (matrix (runif (3*100), nrow=100, ncol=3)) a.dat <- dat[1:50,] b.dat <- dat[51:100,] a.tree <- tree (a.dat) b.pred <- predict.tree (a.tree,

>> In the previous release of r, theire was a index of all functions in R. >> It was was i understand as reference. It was simple to search in this html >> page by function name or by keywords. >> Why, by god, this page is removed in the Veriosn 1.3 of R??? > Take a look at R_HOME/doc/html/function.html .... The browser-based search > engine was not on that page, but

The angle is not based on the polygon edges, but it can seem that way if you do not use the asp=1 argument in your plot. Try this example, > plot(1:10, 1:10, type='n') > x <- c(1, 3, 5, 3) > y <- c(3, 5, 3, 1) > polygon(x, y, angle=0, density=10) > polygon(x, y + 4.5, angle=45, density=10) > polygon(x + 4.5, y + 4.5, angle=90, density=10) > polygon(x + 4.5, y,

Filling polygons with lines is a throwback to the time when the height of quality graphics was the mechanical pen plotter (a device that used a pen in a mechanical arm to draw the plot on a piece of paper). Computing and printing technology has advanced quite a bit from that day, so you may want to reconsider why you want polygons filled with lines instead of just a solid color (and I consider

Thanks for the question. Here is a sample of the code for my plot: Top = c(34, 39, 42, 45, 46, 41, 41, 40, 43, 38, 33, 33) Bottom = c(24, 29, 32, 36, 32, 34, 32,41, 40, 39, 29, 24) plot(1,1, col = "white", xlim = c(1.3,11.7), ylim = c(0,80), axis = FALSE, xaxt = "n") axis(1, at = c(1:12)) polygon(c(c(1:12),c(12:1)), c(top, bottom), col =

I've been trying to get some code to run on a 64-bit FreeBSD machine running R : Copyright 2006, The R Foundation for Statistical Computing Version 2.3.0 (2006-04-24) ISBN 3-900051-07-0 and keep getting a core dump with the following results: *** caught segfault *** address 0x0, cause 'unknown' Traceback: 1: .Call("R_point_in_polygon_sp", as.numeric(point.x),

Tena koe Simon plot(1:10, 1:10, type='n') polygon(c(2,3,6,8), c(2,5,5,3), density=20, angle=90) polygon(c(2,3,6,8), 5+c(2,5,5,3), density=20, angle=0) I don't understand your problem. Perhaps if you "provide[d] commented, minimal, self-contained, reproducible code" it would help. HTH .... Peter Alspach -----Original Message----- From: R-help [mailto:r-help-bounces at

Hello, I need to calculate the centroids of some spatial polygons that I have placed into a Polygons-class object. Is the labeling point in the Polygons-class the centroid of the polygon? Thank you for your help.

I'm using R 1.4.1 under Windows 2000 and am experiencing difficulty installing a package. I've included an example output using Rcmd build, but the same problem occurs with Rcmd check and Rcmd INSTALL. The error (make[1]: /bin/sh.exe: Command not found) is not a new one - it's referenced in readme.packages among other locations. I've placed a copy of sh.exe in C:\bin, but it

I am trying to use the angle option in polygon to create polygons filled with horizontal and vertical lines. The polygons I am crating are irregular and it the angle function appears to set the angle of the shading perpendicular to the polygon sides rather than perpendicular to the axes. Is there any way to set the angle relative to the axes rather than relative to the polygon sides?

Summer job opportunity using Splus/R in Corvallis, Oregon: Great opportunity to gain experience in application of survey designs to natural resources. Graduate level statistician/programmer competent in the development of algorithms using the statistical software SPlus or R to work as a summer hire as part of the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment

Dear all, 1. How can I compute the intersecting area between 2 polygons ? 2. I have polygons with coordinates in decimal degrees (i.e. 13 deg 30 min = 13.5 decimal degrees). I want to compute their area and get the results in square meters or square kiometers. Can anyone give me a conversion coefficient or a pointer where I can find this information (sorry for this off topic question) ? Thanks

# polygon ignores requests to have its border transparent, look at par(bg="transparent") plot(c(0, 3), 0:1) polygon(c(0, 1, 1, 0), c(0, 0, 1, 1), border=NA, col = 0) polygon(c(1, 2, 2, 1), c(0, 0, 1, 1), border="transparent", col = 0) polygon(c(2, 3, 3, 2), c(0, 0, 1, 1), border=0, col = 0) # a quick fix for erase.screen() is the following erase.screen <- function (n =

Dear all, When a conventional kriging and then a contour plot is limited with a polygon (as possible with krige.conv and contour.kriging), the polygon border is displayed in black by default. > kc<-krige.conv(CZdata,loc=pred.grid,borders=czpoly,krige=krige.control(obj.m=ls)) > plot(CZcoord,xlab="x",ylab="y",type="n",asp=1) >

Dear R-users, Is there any way of calculating the perimeter of a polygon in a shapefile object? Furthermore, how to calculate the length of the common border of two polygons? I've searched the code of spded, but could not find a hint on how to do it. Thank you very much, Leo. [[alternative HTML version deleted]]

Objective: Determine if a set of x and y-latitude points are inside of a polygon using R. Lets say I have 9 polygons. Where I have labeled the polygons to be checked from 1-9. The problem I?m running into is running the point.in.polygon to check if those points are in one of several polygons, as my code overwrites the result. To accomplish this I am using the R-built in function called

Hi, I'm trying to use grid.polygon() to plot several polygons at once, with a view to putting coloured polygons beneath a curve. I'm struggling just to get the grid.polygon to plot anything # PLOT SOME POINTS x <- 1:100 y <- 1:100*0.5 + 3 plot(x, y, pch = ".") # PLOT 2 POLYGONS library(grid) grid.polygon(x = c(20, 20, 40, 40, 40, 40, 60, 60), y =

Hello dear members of R-help and R-core mailing list, I am not sure if this request is a "ticket" that should be filled somewhere outside the mailing list. If so, I apologize for not doing and would like to know where I should have filled it. And to the subject matter: I would like to use a command like this: plot(c(1,8), 1:2, type="n") polygon(1:7, c(2,1,2,NA,2,1,2),

Hello dear members of R-help and R-core mailing list, I am not sure if this request is a "ticket" that should be filled somewhere outside the mailing list. If so, I apologize for not doing and would like to know where I should have filled it. And to the subject matter: I would like to use a command like this: plot(c(1,8), 1:2, type="n") polygon(1:7, c(2,1,2,NA,2,1,2),

Hello all, I'm using R1.2.2 and wonder whether there is already a new (unofficial) version that supports fill patterns for polygon(). thanks M.E. -- +------------------------------------------------------- | Marcus Eger +-------- ><> ------------------------------------------- | E-Mail: eger.m at gmx.de (NEW) | marcus.eger at physik.uni-marburg.de (OLD) | WWW: