Displaying 20 results from an estimated 4000 matches similar to: "Creating a flat legend 'grob' for lattice xyplot"
2010 Mar 19
2
lattice grob
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
2005 Oct 03
2
grob questions
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)
>
2009 Sep 19
1
matrix operations on grobs and grid units
Dear list,
As a minimal test of a more complex grid layout, I'm trying to find a
clean and efficient way to arrange text grobs in a rectangular layout.
The labels may be expressions, or text with a fontsize different of
the default, which means that the cell sizes should probably be
calculated using grobWidth() and grobHeight() as opposed to simpler
stringWidth() and stringHeight().
2012 May 22
2
package grid: mirror grob objects along an axis
Hi everyone
I'd like to flip grobs (grid graphical objects) along an axis, e.g. flip grobs
horizontally or vertically. I couldn't find any hints, neither in the
documentation nor by searching the web. Does anybody know how to achieve this?
Cheers
/thomas
2005 Feb 24
1
Place more than one key with xyplot
Dear R-users
I have some trouble to generate more than one key with xyplot using the
legend argument.
I would like one key with rectangles:
library(lattice)
library(grid)
key1 <- list(rectangles = list(col= c(rev(heat.colors(5))[1:5],
rev(heat.colors(5))[4:1])),
title="Percentiles",
space="right",
2008 Jul 09
1
childNames for xaxis grob (grid package)
Dear list,
Can someone explain why the childNames below
gives
character(0)
instead of the (canonical) names of the children grobs
of the xaxis gTree ?
[1] "major" "ticks" "labels"
Many thanks in advance,
Tobias
### minimal example code ###
library(grid)
pushViewport(plotViewport(c(5,4,4,2)))
pushViewport(dataViewport(1:5, 1:5))
grid.points(1:5, 1:5)
2005 Feb 18
1
Examples of multiple key grobs
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
2011 Jun 16
1
Placing Text on ggplot2 graphics vs. xyplot
Greetings to the help mailing list.
I am in the process of translating a large graphic from xyplot to ggplot2 (13 columns by about rows).
I have been unsuccessful trying to understand how to place the following text strings after three days of:
* Perusing Wickham's "gg2plot" book;
* Searching his site for gg2plot and qplot;
* Reviewing the "man pages" for gg2plot;
*
2006 Dec 15
1
xyplot: legend title + legend on 1 line
Does anybody know how in xyplot to put the legend title on one line with the
legend? I can get the legend on one line with columns=... but the title is
always on top. I tried a custom key with key=... and text=... but I can't
put the title text in front of the plotting symbol.
I am looking for the following layout of the legend, on one line:
"Legend Title:" + plot symbol1 + legend
2003 May 12
3
grid - deleting and erasing grobs?
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
2003 May 12
3
grid - deleting and erasing grobs?
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
2005 Nov 02
0
Placing a grob in multiple viewports
Hi all,
What's the best way of placing a grob into muliple viewports? I've
been using code like:
plot_grob_matrix <- function(gm, type=deparse(substitute(gm))) {
grid <- expand.grid(x=1:nrow(gm), y=1:ncol(gm))
do.call(gList,mapply(function(x,y) editGrob(gm[[x,y]], vp=vp_path(x,
y, type)), grid$x, grid$y, SIMPLIFY=FALSE))
}
vp_path <- function(row, col, type) {
2009 May 31
2
grid.edit() for ggplot2
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
2010 Jun 16
0
replicate a grob n times
Dear all,
I use the following to create a list of identical grobs,
require(grid)
rep.grob <- function(g, n){
replicate(n, g, simplify=FALSE)
}
This approach suffers two problems:
1- R CMD check is not happy about the S3-like name. How can / Should I
make this a real S3 method?
2- I don't know if this is the most efficient way to do it.
Suggestions are welcome.
Regards,
baptiste
2008 Aug 29
1
ggplot2: Changes to grobs not saved to file output
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.
--
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2005 Oct 15
2
grid.edit problem
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 =
2005 Apr 14
2
Legend in xyplot two columns
Dear R-Help
I have some trouble to set the legend in a xyplot into two rows.
The code below gives me the legend in the layout I am looking for, I
just rather have it in two rows.
library(lattice)
schluessel <- list(
points=list( col="red", pch=19, cex=0.5 ),
text=list(lab="John"),
lines=list(col="blue"),
2011 Feb 15
1
gList and gTree methods of grid::grobX
Dear all,
In an attempt to draw fill patterns in grid graphics, I have
encountered a behavior of grobX that I cannot understand from the
documentation. Consider this,
library(grid)
## gTree
g1 <- gTree(children=gList(
rectGrob(0.5,0.5, width=unit(0.8,"npc"),
height=unit(2,"cm")),
circleGrob(r=0.3)), vp=viewport(0.5,0.5))
##
2009 Sep 28
2
dichromat, regexp, and grid objects
Dear list,
The dichromat package defines a dichromat function which "Collapses
red-green color distinctions to approximate the effect of the two
common forms of red-green colour blindness, protanopia and
deuteranopia."
library(dichromat)
library(grid)
colorStrip <-
function (colors = 1:3, draw = TRUE)
{
x <- seq(0, 1 - 1/length(colors), length = length(colors))
y <-
2005 Oct 03
1
Grid: constructing a gTree with grobs that use named viewports from a vpTree
I'm trying to create a layout with named viewports that I can use for
other functions. I create the viewport tree that I want, and a list
of grobs with the viewports describing where they should go.
library(grid)
vp <- vpTree(
viewport(layout=grid.layout(2,2), name="layout"),
children=vpList(
viewport(layout.pos.col = 1, layout.pos.row=1, name="tl"),