similar to: Transparent color ramp problem

Two "updated" patches, according to Michel Daenzers review. See separate e-mail for details. 01/10: Replaces original 01/09 -- Same code, updated commit message. 10/10: Just for demonstration, not for application to ddx.

Hi, I want to use a discrete color ramp with plot3D, and show NA values as white (default). I get unexpected results per the following. # as in help(slice3D) example: par(mfrow = c(2,2)) x <- y <- z <- seq(-1, 1, by = 0.1) grid <- mesh(x, y, z) colvar <- with(grid, x*exp(-x^2 - y^2 - z^2)) slice3D (x, y, z, colvar = colvar, theta = 60) # # use three discrete classes and colors

Dear list members, I am trying to use the maptools library to display geographical data. At the moment I have some trouble understanding how the " auxvar " variable is supposed to be used in the plot.Map function. I am using R Version 1.8.1 (2003-11-21) on Linux Looking at the plot.Map function itself, I see that it calls a color.ramp function (I am reporting only the relevant

Hello All, I have a discontinuous dataset and I used spplot to plot the points. I was wondering whether it is possible to show the legend of the plot as color ramp. I saw that on continuous data. If anyone could tell me that would be great. Another thing I would like to know is how can we create the horizontal legend. By default, the legend is vertical. I was able to shift the legend inside

Dear List, I want to use transparency in R to represent downweighting of observations based on clusters (repeated observations in a dataset). Some clusters will have identical covariate values in a parameter space -- in the 2D x,y case, these represent a bunch of semi-tranparent dots in the same place. I'd like these overlapping dots to be completely opaque. In other cases, the

Greetings! I'm having an issue with the windrose produced by the windrose function from the circular package. For our weather stations in North Carolina I'm helping with a script which takes hourly wind speed and direction data to create windroses for our end users. One of the stations in the mountains frequently reaches wind speed of 40 to 60 mph and in storms can reach wind speed over

Dear "R-listers" I've been trying to figure out how to annotate charts in ggplot (ie add text to line charts, highlighted boxes etc). By and large, I can get close to what i want with base graphics, but would ideally like to use ggplot whenever possible (additionally, i would like to add text labels automatically to the chart). The code is below I suspect I need to use geom_rect,

Dear All: I have a question regarding the behavior of functions. Say I define a function that returns another function : A <- function(parameters) { # calculations w/ parameters returning 'y' tmpf <- function(x) { # function of 'y' } return(tmpf) } The value of the parameters are stored in an environment local to the function. Then I call x<- something

Dear HelpeRs, I have a script where I save several thousands of graphics. These are then used in Latex through Sweave. Unfortunately R crashes while making these plots and Windows pops up some message that I run low on virtual memory. I tried to save the plots using pdf(), windows() and postscript() and also tried to run it with R CMD BATCH myscript.R. But after a while R slows down and crashes

Hello All, I am using the following code to draw a figure. But the legend given buy auto.key has mismatched colors. Could any one help me? I am using R2.12.1 and most current lattice on windows XP. Thanks John library(lattice) src <- data.frame(t=rep(c('A','B','C','D'), rep(8,4)), s=rep(c(8132,8140,8178,8180,8224,8230,8337,8345), 4),

I want to get a lighter shade of a color...I have a lot of colored objects and want each one printed as a foreground against a slightly lighter background. I thought I could try something like changing the alpha channel by first converting it to rgb. But prior to trying that, I'm stuck with how to get the color after converting using col2rgb() to be interpreted again as a color, rather than

I am using attributes colsep and sepwidth from heatmap.2 function, however when using larger values for sepwidth the following columns are not moved to the right but the seperator is covering the column(s) with a white bar and the column labels and ColSideColors remain at their positions, is this intended? I expected the following columns to be shifted to the right by sepwidth. Is there a way

Hi All, In function "rgb", alpha parameter is supposed to set the transparency value. But in my following two examples, it didn't work: plot(1,col = rgb(1,0,0,alpha =0.8)) # as long as alpha < 1, there is no point in the plot. plot(1,col = rgb(0,0,255, alpha=254, maxColorValue=255)) # as long as alpha < 255, there is no point in the plot. Do I use it in the right way? Any

Running R version 2.6.1 under Linux, I'm trying to use the maps and mapdata packages and the state database to produce a thematic map of the USA. My problem is that cracks (white spaces) appear between some states--e.g. between Colorado and Utah and between Michigan and Indiana. The resulting visual impression is that the country is breaking up. This occurs in all the projections I have

Hi, i am newbie into ggplot and i thow that i have to learn a lot about this package. I am doing this function to draw an graphic: library(ggplot2) posx <- theme_text(angle=45,hjust=1,face='bold',size=12) posy <- theme_text(angle=0,hjust=1,face='bold',size=12) y1 <- c(1,4,6,1,8,10,6,1,5,4) x <-

I'm wondering how the cex parameter is used to scale circles (i.e. does it scale the radius, diameter, area, circumference, etc.?). In my case I'm using lattice with filled circles (pch=19). Based on example, it looks like R scales the radius of the circle: library(lattice) dta<-data.frame(x=rep(1,6),y=rep(1,6),sz=c(1,2,4,8,16,32))

Hi, I have thought a lot about my problem and also posted it on stackexchange, the post can be found here: http://stats.stackexchange.com/questions/44276/how-to-plot-3d-gbm but I have got no useful answer, that's why I trry the last possibility, which is to ask you professional guys. I want to recreate the following picture with my own code, the picture can be found in my other post:

Dear R Gurus, I have a fairly simple problem, but I haven't been able to find the answer on 'the google' or in the r-help archives. I am generating plots on both Windows and OS X where I need to guarantee that the font used is Arial. In my plot command I specify 'fontfamily="Arial"'. The problem is that on Windows I'm getting the following warning: Warning

Hi, I'd like to draw a polygon graph. I used the package lattice extra which includes a function for that (see: http://latticeextra.r-forge.r-project.org/#panel.xyarea&theme=default). But i don't want the polygon ending with its filled border at the x-axis (like in my code). Instead it should be rotated about 90 degrees and end with its filled border at the y-axis. I'm pleased

Hi, I've been trying to use libtheora-experimental (libtheoraenc and libtheoradec) to encode a webcam feed in real-time, to be decoded also in realtime by a second party via XXX-IP, with - unfortunately - not so good results. I'm using custom written functions to convert from RGB8 to YUV420 and back and, although not much processor-efficient, they do what they're supposed to