Re: [R] how to draw manifold?
Hi,
I'm joining in with a question -- is it possible to vary the color of
the lines along z? The 'colors' argument doesn't seem to allow a
vector in this situation.
Thanks,
baptiste
On 21 November 2010 21:02, Carl Witthoft c...@witthoft.com wrote:
Thanks, Dennis. Here's an enhanced version:
z - seq(-10, 10, 0.1)
zm-cbind(z,z,z,z,z,z,z,z,z,z)
ym-matrix(nr=201,nc=10)
for (i in seq(1,201)) {
for (j in seq(1,10)) ym[i,j]-j/10*sin(zm[i,1])}
xm-matrix(nr=201,nc=10)
for (i in seq(1,201)) {
for (j in seq(1,10)) xm[i,j]-j/10*cos(zm[i,1])}
scatterplot3d(as.vector(t(xm)), as.vector(t(ym)), as.vector(t(zm)), main =
'Helix', pch = .,type='l')
From there I can draw a few helical lines by modifying your original code
(for different radii), and end up with a pretty decent mesh surface.
Carl
On 11/20/10 12:03 PM, Dennis Murphy wrote:
Hi:
Here's an example stolen out of the scatterplot3d package vignette (p. 9):
library(scatterplot3d)
z- seq(-10, 10, 0.01)
x- cos(z)
y- sin(z)
scatterplot3d(x, y, z, highlight.3d = TRUE, col.axis = 'blue',
col.grid = 'lightblue', main = 'Helix', pch = 20)
HTH,
Dennis
On Sat, Nov 20, 2010 at 8:29 AM, Carl Witthoftc...@witthoft.com wrote:
Hi,
I need some help either in how to configure variables for wireframe(), or
some suggestions as to other graphics commands to use for plotting a 2-D
manifold in 3-D space.
Here is an example I tried (in the hopes that it would plot a helical
line)
:
xsp-matrix(c(cos(seq(0,80)/5)),9,9)
ysp-matrix(c(sin(seq(0,80)/5)),9,9)
zsp-matrix(c((seq(0,80)/20)),9,9)
wireframe(zsp~xsp*ysp)
The resulting plot looks vaguely like a helix, but not right. And if I
change my variables' dimensions to c(3,27) it looks better, but if the
dims are c(1,81), nothing gets plotted.
So: is there a way to control which points are connected by lines in
wireframe()? Or is there a more appropriate way to provide a plotting
program with sets of coordinates in 3-space?
My primary goal is to be able to plot surfaces, not just a line as in my
sample code. For example, I might expand the data above to represent
points
on a 'ribbon' helix.
Thanks for yr. help -- feel free to point me to help files for existing
packages or plotting routines.
Carl
__
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to draw manifold?
On Nov 21, 2010, at 3:42 PM, baptiste auguie wrote:
Hi,
I'm joining in with a question -- is it possible to vary the color of
the lines along z? The 'colors' argument doesn't seem to allow a
vector in this situation.
This section of the code (which appears fairly close to the beginning,
makes me think that the color argument is passed as part of the x
argument.
if (!is.null(d - dim(x)) (length(d) == 2) (d[2] =
4))
color - x[, 4]
else if (is.list(x) !is.null(x$color))
color - x$color
-
Either as the 4th column of a matrix or as a color-list-element.
David.
Thanks,
baptiste
On 21 November 2010 21:02, Carl Witthoft c...@witthoft.com wrote:
Thanks, Dennis. Here's an enhanced version:
z - seq(-10, 10, 0.1)
zm-cbind(z,z,z,z,z,z,z,z,z,z)
ym-matrix(nr=201,nc=10)
for (i in seq(1,201)) {
for (j in seq(1,10)) ym[i,j]-j/10*sin(zm[i,1])}
xm-matrix(nr=201,nc=10)
for (i in seq(1,201)) {
for (j in seq(1,10)) xm[i,j]-j/10*cos(zm[i,1])}
scatterplot3d(as.vector(t(xm)), as.vector(t(ym)), as.vector(t(zm)),
main =
'Helix', pch = .,type='l')
From there I can draw a few helical lines by modifying your
original code
(for different radii), and end up with a pretty decent mesh
surface.
Carl
On 11/20/10 12:03 PM, Dennis Murphy wrote:
Hi:
Here's an example stolen out of the scatterplot3d package vignette
(p. 9):
library(scatterplot3d)
z- seq(-10, 10, 0.01)
x- cos(z)
y- sin(z)
scatterplot3d(x, y, z, highlight.3d = TRUE, col.axis = 'blue',
col.grid = 'lightblue', main = 'Helix', pch = 20)
HTH,
Dennis
On Sat, Nov 20, 2010 at 8:29 AM, Carl Witthoftc...@witthoft.com
wrote:
Hi,
I need some help either in how to configure variables for
wireframe(), or
some suggestions as to other graphics commands to use for
plotting a 2-D
manifold in 3-D space.
Here is an example I tried (in the hopes that it would plot a
helical
line)
:
xsp-matrix(c(cos(seq(0,80)/5)),9,9)
ysp-matrix(c(sin(seq(0,80)/5)),9,9)
zsp-matrix(c((seq(0,80)/20)),9,9)
wireframe(zsp~xsp*ysp)
The resulting plot looks vaguely like a helix, but not right.
And if I
change my variables' dimensions to c(3,27) it looks better, but
if the
dims are c(1,81), nothing gets plotted.
So: is there a way to control which points are connected by lines
in
wireframe()? Or is there a more appropriate way to provide a
plotting
program with sets of coordinates in 3-space?
My primary goal is to be able to plot surfaces, not just a line
as in my
sample code. For example, I might expand the data above to
represent
points
on a 'ribbon' helix.
Thanks for yr. help -- feel free to point me to help files for
existing
packages or plotting routines.
Carl
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to draw manifold?
Thanks, Dennis. Here's an enhanced version:
z - seq(-10, 10, 0.1)
zm-cbind(z,z,z,z,z,z,z,z,z,z)
ym-matrix(nr=201,nc=10)
for (i in seq(1,201)) {
for (j in seq(1,10)) ym[i,j]-j/10*sin(zm[i,1])}
xm-matrix(nr=201,nc=10)
for (i in seq(1,201)) {
for (j in seq(1,10)) xm[i,j]-j/10*cos(zm[i,1])}
scatterplot3d(as.vector(t(xm)), as.vector(t(ym)), as.vector(t(zm)), main
= 'Helix', pch = .,type='l')
From there I can draw a few helical lines by modifying your original
code (for different radii), and end up with a pretty decent mesh surface.
Carl
On 11/20/10 12:03 PM, Dennis Murphy wrote:
Hi:
Here's an example stolen out of the scatterplot3d package vignette (p. 9):
library(scatterplot3d)
z- seq(-10, 10, 0.01)
x- cos(z)
y- sin(z)
scatterplot3d(x, y, z, highlight.3d = TRUE, col.axis = 'blue',
col.grid = 'lightblue', main = 'Helix', pch = 20)
HTH,
Dennis
On Sat, Nov 20, 2010 at 8:29 AM, Carl Witthoftc...@witthoft.com wrote:
Hi,
I need some help either in how to configure variables for wireframe(), or
some suggestions as to other graphics commands to use for plotting a 2-D
manifold in 3-D space.
Here is an example I tried (in the hopes that it would plot a helical line)
:
xsp-matrix(c(cos(seq(0,80)/5)),9,9)
ysp-matrix(c(sin(seq(0,80)/5)),9,9)
zsp-matrix(c((seq(0,80)/20)),9,9)
wireframe(zsp~xsp*ysp)
The resulting plot looks vaguely like a helix, but not right. And if I
change my variables' dimensions to c(3,27) it looks better, but if the
dims are c(1,81), nothing gets plotted.
So: is there a way to control which points are connected by lines in
wireframe()? Or is there a more appropriate way to provide a plotting
program with sets of coordinates in 3-space?
My primary goal is to be able to plot surfaces, not just a line as in my
sample code. For example, I might expand the data above to represent points
on a 'ribbon' helix.
Thanks for yr. help -- feel free to point me to help files for existing
packages or plotting routines.
Carl
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] how to draw manifold?
Hi, I need some help either in how to configure variables for wireframe(), or some suggestions as to other graphics commands to use for plotting a 2-D manifold in 3-D space. Here is an example I tried (in the hopes that it would plot a helical line) : xsp-matrix(c(cos(seq(0,80)/5)),9,9) ysp-matrix(c(sin(seq(0,80)/5)),9,9) zsp-matrix(c((seq(0,80)/20)),9,9) wireframe(zsp~xsp*ysp) The resulting plot looks vaguely like a helix, but not right. And if I change my variables' dimensions to c(3,27) it looks better, but if the dims are c(1,81), nothing gets plotted. So: is there a way to control which points are connected by lines in wireframe()? Or is there a more appropriate way to provide a plotting program with sets of coordinates in 3-space? My primary goal is to be able to plot surfaces, not just a line as in my sample code. For example, I might expand the data above to represent points on a 'ribbon' helix. Thanks for yr. help -- feel free to point me to help files for existing packages or plotting routines. Carl __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how to draw manifold?
Hi: Here's an example stolen out of the scatterplot3d package vignette (p. 9): library(scatterplot3d) z - seq(-10, 10, 0.01) x - cos(z) y - sin(z) scatterplot3d(x, y, z, highlight.3d = TRUE, col.axis = 'blue', col.grid = 'lightblue', main = 'Helix', pch = 20) HTH, Dennis On Sat, Nov 20, 2010 at 8:29 AM, Carl Witthoft c...@witthoft.com wrote: Hi, I need some help either in how to configure variables for wireframe(), or some suggestions as to other graphics commands to use for plotting a 2-D manifold in 3-D space. Here is an example I tried (in the hopes that it would plot a helical line) : xsp-matrix(c(cos(seq(0,80)/5)),9,9) ysp-matrix(c(sin(seq(0,80)/5)),9,9) zsp-matrix(c((seq(0,80)/20)),9,9) wireframe(zsp~xsp*ysp) The resulting plot looks vaguely like a helix, but not right. And if I change my variables' dimensions to c(3,27) it looks better, but if the dims are c(1,81), nothing gets plotted. So: is there a way to control which points are connected by lines in wireframe()? Or is there a more appropriate way to provide a plotting program with sets of coordinates in 3-space? My primary goal is to be able to plot surfaces, not just a line as in my sample code. For example, I might expand the data above to represent points on a 'ribbon' helix. Thanks for yr. help -- feel free to point me to help files for existing packages or plotting routines. Carl __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
