Displaying 6 results from an estimated 6 matches for "polydata".
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2007 Aug 10
1
Unexpected behavior in PBSmapping package
Using R 2.5.1 on Windows XP Professional, and PBSmapping package version
2.51, I have encountered some behavior which puzzles me. I am including
the package's listed maintainer on this email but also seek the thoughts
of the R-help community.
I have a set of EventData, which I want to plot as points, and to color
the points according to some criterion. It turns out that some of my
2011 Aug 16
1
PBSmapping, where is Ireland?!
Hi folks,
I've been using 'PBSmapping' to make a map of Europe with some labels. I've
been using the 'worldLL' PolyData, as my computer is too slow to make my own
from the GSHHS files.
The only problem is this PolyData does not seem to include Ireland. I have
no idea why this should be so, other European islands such as Sardinia etc.
are included. http://r.789695.n4.nabble.com/file/n3747120/map1.jpeg
The code I...
2011 May 18
3
R Style Guide -- Was Post-hoc tests in MASS using glm.nb
...this a lot in the data preparation phase of a project, especially, which is usually the longest, trickiest, most important, but least discussed aspect of any data analysis project.
>
> Here is a simple example using within() for something you cannot do in one step with transform():
>
> polyData <- within(data.frame(x = runif(500)), {
> ?x2 <- x^2
> ?x3 <- x*x2
> ?b <- runif(4)
> ?eta <- cbind(1,x,x2,x3) %*% b
> ?y <- eta + rnorm(x, sd = 0.5)
> ?rm(b)
> })
>
> check:
>
>> str(polyData)
> 'data.frame': ? 500 obs. of ?5 variabl...
2013 Mar 10
1
misc3d Contour export to vtk
...unt(id, "vertices")
verts <- rgl.attrib(id, "vertices")
norms <- rgl.attrib(id, "normals")
cols <- rgl.attrib(id, "colors")
if (n3 %% 3 != 0) stop("verts not divisible by 3")
n <- n3/3
start <- c(start, "DATASET POLYDATA", paste("POINTS ", n3, " float", sep=
""))
cat(start, sep="\n", file=f)
dat <- matrix(t(verts), ncol=9, byrow=TRUE)
## write the points
cat(sprintf("%f %f %f %f %f %f %f %f %f\n", dat[,1], dat[,2], dat[,3],
dat[,4],...
2011 May 16
2
Post-hoc tests in MASS using glm.nb
I am struggling to generate p values for comparisons of levels (post-hoc
tests) in a glm with a negative binomial distribution
I am trying to compare cell counts on different days as grown on different
media (e.g. types of cryogel) so I have 2 explanatory variables (Day and
Cryogel), which are both factors, and an over-dispersed count variable
(number of cells) as the response. I know that both
2005 Jul 26
2
grep help needed
Hi,
In another thread ("PBSmapping and shapefiles") I asked for an easy
way to read "shapefiles" and transform them in data that PBSmapping
could use. One person is exploring some ways of doing this, but it is
possible I'll have to do this "manually".
With package "maptools" I am able to extract the information I need
from a shapefile but it is