Displaying 11 results from an estimated 11 matches for "quadrilaterals".
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quadrilateral
2006 Oct 19
1
A question regarding Wireframe in Package Lattice
Hello,
The following code produces a quadrilateral:
q<-matrix(c(1,3,1,2,3,1,2,4,2,1,4,2),nrow=4,byrow=T)
qc<-xyz.coords(q)
wireframe(z~y*x,qc)
I have 2 questions
1) How can i remove the bounding box i.e the cube encompassing the
quadrilateral?
2) Is there any function to get the 2D coordinates of the
quadrilateral actually used in the final plot ? I could manually
2012 Aug 27
1
RGL plot : lighting problem when triangle3d and persp3d are used in the same plot
Dear all,
I have tried to plot a triangular matrix with the function persp3d(rgl).
for example
z=rbind(c(1,NA,NA,NA),c(5,3,NA,NA),c(4,2,9,NA),c(8,6,5,11))
x=1:4
y=1:4
persp3d(x,y,z,color="gray")
The two extreme points are not plotted (value=1 and value=10). It seems
because the half of the matrix have 'NA' and perp3d need planar
quadrilateral face. So I decided to use the
2003 May 02
1
stepfuns: R^2 -> R
Does anyone have any suggestions on perspective plotting of piecewise constant functions?
Ideally, I would like something like plot.stepfun for functions that are piecewise
constant on polygons. Even pointers to non-R strategies would be welcome at this stage.
url: www.econ.uiuc.edu Roger Koenker Dept. of Economics UCL,
email rkoenker at uiuc.edu Department of Economics Drayton House,
vox:
2011 Feb 26
1
wireframe() display a graph with two colors, not a gradient.
Hi all,
I'm quite new to wireframe, essentially what I want to do is display a graph, and z-values > 1 would be yellow and those < 1 would be blue.
This is a bit of my data.
0.334643563 0.350913807 0.383652307
0.370325283 0.38779016 0.42387392
0.39861579 0.418389687 0.460692165
0.43888516 0.468015843 0.520560489
0.499544084 0.535099422 0.60982153
0.569888047 0.634351734
2002 Dec 03
1
Plotting Speed: R vs Octave
Thank you. Guess it's a plausible explanation.
> -----Original Message-----
> From: Liaw, Andy [mailto:andy_liaw at merck.com]
> Sent: Tuesday, December 03, 2002 08:05 AM
> To: 'Chunlou Yung'
> Subject: RE: [R] Plotting Speed: R vs Octave
>
>
> If I'm not mistaken, Octave does not have its own graphics system, but
> rather rely on gnuplot, which is
2007 Oct 08
2
Fill a polygon with a pattern
What is the simplest (namely: minimum number of libraries or conflicts)
way to fill a polygon with a pattern?
For example, suppose I have (in a graphic file, like a jpeg) the
drawing of an "X". Then I fill a polygon (like a triangle) with
this pattern, and get something like:
X
XXX
XXXXX
XXXXXXX
(where the border "X"s could be truncated).
I searched the rimage
2010 Feb 18
2
3D plot
Dearl list,
can anyone point me to a function or library that can create a graph similar to the one in the following powerpoint presentation?
http://bmi.osu.edu/~khuang/IBGP705/BMI705-Lecture7.ppt
(pages 36-37)
In order to try to explain the graph, the way I see it in R terms is something like this:
the "p-q" axis is a vector of positions (for example, seq(0,5000000,1))
the
2001 Jan 06
4
3D package in R
Hi all,
I am considering writing a 3D visualisation package for R.
Purposes:
- Visualise 3 dimension data
- Manipulate the data or series or any other object with the mouse as in any 3D software (3D Studio Max, Lightwave...)
- Eventually display more than just 3D objects.
Justification:
- It's always interesting to plot data before performing any analysis
- Manipulating (rotating,
2003 Aug 13
6
placing labels in polygon center ?
Dear all,
is there any function to calculate the center of a polygon mass in R?
Actually I need to find the best location within polygons to place labels.
Thanks for any hint
Jens Oehlschl?gel
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2012 Mar 26
0
Pareto frontier plots in three dimensions
Hello all
This is my first posting for some years. I am back
using R again and must say I do like the language
(regarding scripting, I also use matlab, perl, and bash).
My question involves plotting a Pareto frontier in
three dimensions. This is strictly a exercise in
visualization, I make no attempt to extract the Pareto
set (aka dominating subset) first.
EXAMPLE PLOTS
For some example
2010 May 05
0
R-help Digest, Vol 87, Issue 5
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