similar to: ggplot2: remove minor-horizontal guide before drawing

Dear all, I'm trying to access and modify grobs in a ggplot2 plot. The basic idea for raw Grid objects I understand from Paul Murrell's R graphics book, or this page of examples, http://www.stat.auckland.ac.nz/~paul/grid/copygrob/copygrobs.R However I can't figure out how to apply this to a ggplot (basically I don't know how to write a syntactically correct gPath), p

Dear list, I'm trying to arrange various grid objects on a page using a frameGrob. It works fine with basic grobs (textGrob, gTree, etc.), and also with ggplot2 objects using the ggplotGrob() function. I am however stuck with lattice. As far as I understand, lattice produces a list of class trellis, which is eventually displayed using the plot.trellis method. I am not sure if/how one can

Hello, Maybe I missed something - most likely .:-( I create a gplot and then makes some changes to the plot using grid graphics functions. These changes show up on the display OK, but when I save using ggsave() the grid changes do not show up. How do I save the plot with these changes? Thanks in advance. -- View this message in context:

Hi, With ggplot2 v0.8, how do I position a legend on top of the plot. Things like p + opts(legend.position="top") work ok. But p + opts(legend.position=c(0.5,0.5)) gives Error in as.character(x) : cannot coerce type 'closure' to vector of type 'character' so obviously I should be giving a string instead but I can't figure out what it should be. Thanks,

Hi, Is there a way of annotating a ggplot plot with mathematical formulae? I can do geom_text(aes(label="some text", ... but I can't do geom_text(aes(label=expression(x^{n-1}), ... It gives the error Error: geom_text requires the following missing aesthetics: label Is there a convenient equivalent? Cheers, Paul

Is there an R equivalent to SAS's proc gremove? You would use this procedure to combine the units on an existing map, for example to build a map of Metropolitan Statistical Areas (MSAs) from the [US] counties dataset where the internal boundries surround the MSAs (which are groups of counties) rather than the individual counties. I can imagine the mechanism would be to find and erase the

Hello, I created several plot with ggplot2 dev mode. Now I want to combine the plots in a grid e.g. 2x2 with a fixed size of the output. What I am doing at the moment is: grid.newpage() pushViewport(viewport(layout = grid.layout(nrow=2, ncol=2, widths = unit(c(7.5,6.5), "cm"), heights = unit(rep(5, 2), "cm")))) print(plot1, vp = viewport(layout.pos.row = 1,

I'm doing some analyses of historical data from France in 1830 on 'moral statistics' that I'd like to show on a map. I've done most of my analyses in SAS, but a few things would work better in R. To do this, I have to adjust the modern map, library(maps) map('france') to adjust for changes in departments (86 in 1830, to 97 now). I've read the documentation

Dear R users I have problems horizontally aligning labels in keys of lattice plots when the labels make use of plotmath. Here's a self-contained example: dat <- data.frame(x = rnorm(10), y = rnorm(10), z = factor(rep(c("a", "b"), each = 5))) xyplot(y ~ x, dat, groups = z, auto.key = list(columns = 2, text =

Hi, I am trying to write a function which takes a formula as input and outputs a new formula with a different response while keeping the rest of the formula the same. I.e. respapply : ( y ~ a+b ) -> ( f(y) ~ a + b ) I have tried the following but it doesn't work. The terms become invalid as shown below. respapply <- function(fm, f) { fm[[2]] <- f(eval(fm[[2]])) fm;

Hi, If R is compiled for a 64 bit platform, does the double data type make use of the additional precision or is it set at a fixed length? Thanks, Paul

Hello! Don't quite understand how can I delete grobs and simultaneously erase graphic output they produce. I first change grob's "vp" field to null (grid.edit(gr,vp=NULL)) to erase it and then call rm(gr) (as grobs are external pointers I'm not shure what this method actually frees allocated memory). May be there is simpler method? Does garbage collector have any effect

Hello! Don't quite understand how can I delete grobs and simultaneously erase graphic output they produce. I first change grob's "vp" field to null (grid.edit(gr,vp=NULL)) to erase it and then call rm(gr) (as grobs are external pointers I'm not shure what this method actually frees allocated memory). May be there is simpler method? Does garbage collector have any effect

I am using wireframe from the lattice package, with the shade option set to TRUE. When I output to PDF or Postscript, a line gets drawn around each polygon of my surface which causes ugly Moir? effects and doesn't make sense in my application (think the plot of Maunga Whau--gridlines don't make sense). This does not happen when I display on the screen-- then I just get the surface as

ggplot provides a new system for drawing graphics in R, based on the Grammar of Graphics. It combines the advantages of both base and lattice graphics: conditioning and shared axes are handled automatically, and you can still build up a plot step by step from multiple data sources. It also implements a more sophisticated multidimensional conditioning system and a consistent interface to map data

ggplot provides a new system for drawing graphics in R, based on the Grammar of Graphics. It combines the advantages of both base and lattice graphics: conditioning and shared axes are handled automatically, and you can still build up a plot step by step from multiple data sources. It also implements a more sophisticated multidimensional conditioning system and a consistent interface to map data

If I run the following example from: http://www.stat.auckland.ac.nz/~paul/grid/doc/grobs.pdf > grid.newpage() > pushViewport(viewport(w = 0.5, h = 0.5)) > myplot <- gTree(name = "myplot", children = gList(rectGrob(name = "box", + gp = gpar(col = "grey")), xaxisGrob(name = "xaxis"))) > grid.draw(myplot) >

Hi, I want my xyplot legend to be flat, not tall, and there seems to be no way for xyplot's auto.key and key elements to do this: I tried many, many permutations of what I could find in the archives and reading the documentation. If there there's a way to make it flat, please tell me what the magic incantation is. Here's a simple example of what I like to see. The xyplot will be a

The xyplot help page gives quite a lot of information how to use key and indicates that legend needs to be used if multiple keys are needed. However, it gives only a brief description of what the grob needs to contain to do multiple keys. I've only used the occasional grid function in panel functions, so I don't have much of a sense of how grobs are constructed. I've been unable to

I am having a problem in editing a grob. It works ok if I try to shift the grob using npc coordinates but if I do the same thing using native coordinates the grob disappears. What is wrong? library(grid) grid.newpage() # create viewport pushViewport(viewport(xscale = c(100,200), name = "X")) # draw vertical line grid.lines(150, 0:1, default.units = "native", name =