Displaying 20 results from an estimated 5000 matches similar to: "how to draw a perspective pyramid"
2012 Apr 12
2
pyramid.plot in plotrix, axis labelling
Hi, I've been looking at ways to make pyramid plots in R. I like the pyramid.plot method in plotrix as it seems the simplest to use and building them in ggplot looks a bit more code intensive than I'd like, being as I'm new to R. This package does pretty much what I need it to do, however I can't seem to scale the x axis labels. The other labels scale fine with labelcex.
I
2009 Jul 30
1
Transparency and pyramid.plot
Hi all
Another question related to my earlier -- how might I get transparency to work
with pyramid.plot in library(plotrix)? I can't figure it out, and the help page
says it is there but doesn't give an example.
Thanks!
2009 May 04
2
A variation on the bar plot
Hi all,
I cannot think of the technical name of this plot, but I want to create a
plot with the data below that looks like two back-to-back horizontal bar
plots.
Ideally, there would be a vertical line in the center of the plot at zero,
and on the right hand side would be 4 bars representing the values for 2007,
and on the left side of the vertical line would be the corresponding values
for 2005.
2011 Feb 09
2
Generate multivariate normal data with a random correlation matrix
Hi All.
I'd like to generate a sample of n observations from a k dimensional
multivariate normal distribution with a random correlation matrix.
My solution:
The lower (or upper) triangle of the correlation matrix has
n.tri=(d/2)(d+1)-d entries.
Take a uniform sample of n.tri possible correlations (runi(n.tr,-.99,.99)
Populate a triangle of the matrix with the sampled correlations
Mirror the
2010 Feb 13
4
Labels on a pyramide
I am using pyramid.plot() from the plotrix package.
I have something like this
############################################
xy.pop<-dados$masfr
xx.pop<-dados$femfr
#agelabels<-dados$femlab
xycol<-color.gradient(c(0,0,0.5,1),c(0,0,0.5,1),c(1,1,0.5,1),11)
xxcol<-color.gradient(c(1,1,0.5,1),c(0.5,0.5,0.5,1),c(0.5,0.5,0.5,1),11)
xylab<-dados$maslab
xxlab<-dados$femlab
2007 Sep 16
0
Dual Connections with Soekris net4801and Pyramid Linux
I''m trying to connect to two ISPs the connections are as follows:
Eth0
IP: 192.168.1.1
Mask: 255.255.255.0
Eth1
IP: 216.167.217.241
Mask: 255.255.255.0
Eth2
IP: 216.167.208.40
Mask: 255.255.255.0
Here are the commands to set things up:
#Load modules
insmod /lib/modules/2.6.19.2-
pyramid.metrix.net/kernel/net/ipv4/multipath_drr.ko
insmod
2004 Nov 25
4
Avoiding for-loops
Hello R-users,
I have a symmetric matrix of numerical values and I
want to obtain those values in the upper or lower
triangle of the matrix in a vector. I tried to do the
job by using two for-loops but it doens't seem to be a
clever way, and I'd like to know a more efficient code
for a large matrix of thousands of rows and columns.
Below is my code for your reference.
Thanks a lot.
2004 Jan 12
1
Matrix indexes
Two questions about matrix indexing:
Is is correct that V <- V[lower.tri(V, diag=TRUE)] returns the lower
triangular of matrix V, that is: all elements above diagonal are set to zero? I
understand that the triangle of matrix elements of V for which lower.tri is
TRUE are returned while the others (above diagonal) are set to zero (or NA ???).
If D and B are vectors of logicals,
what
2000 Jul 07
2
Question of programming style
This is really a question of how to program this *BETTER*. It works as I have
done it, but is quite ugly.
I want to do a 3d scatterplot of the upper triangle of a matrix, where the
z-values are the values in the matrix, and the row and column indices are the y-
and x-values. The complete (11 by 11) matrix is mmtop94.2. Here is my awkward
code:
mmtop94.2[lower.tri(mmtop94.2)] <- NA
# Here i
2008 Feb 21
2
triangle.plot - change the axes orientation
Hello, I need to chenge axes orirentation in triangle plot. (function
triangle.plot in ade4 package)
I want to plot elasticities of some species in demographic triangle, where
axes values commnly increace "clockwise".
If some better imangination is needed, see
http://www.open.ac.uk/science/biosci/personalpages/j.silvertown/pdfs/Silvertown%20et%20al.%201993.pdf
I am sorry if I just
2011 Nov 14
1
Confused with an error message related to "plotrix" library in the newer versions of R.
Dear R Users,
Greetings!
I am confused with an error message related to "plotrix" library in the
newer versions of R.
I used to run an R script without fail in the earlier versions (R 2.8.1) of
R; but the same script is now throwing up an error message in the newer
versions (Now I have R 2.13.0 & R 2.14.0).
Herewith I am furnishing the same code for your perusal. It would
2011 Oct 31
3
Plot two matrices and keeping the record of row names
Dear all,
I have two data frames- x1 and y1 with same row names and column names(actually the names of the patients).
x1
a b c d e
a 1.0000000 0.4730679 0.6226994 0.6036036 0.6433333
b 0.4730679 1.0000000 0.6227273 0.6303855 0.5730858
c 0.6226994 0.6227273 1.0000000 0.7290503 0.6900585
d 0.6036036 0.6303855 0.7290503 1.0000000
2009 Jul 09
9
Population pyramids
Hi, I hope somebody can help me with this issue: I am doing population pyramids using the barplot command, so in the left side I have male age structure and in the right side the female age structure. To plot the male age structure I put the data in negative numbers. Now, I want to change the sign in the bar plot in such way that I have no-sign numbers, both in left and right side of the graph. I
2007 Nov 29
1
?eigen documentation suggestion
from ?eigen
symmetric: if 'TRUE', the matrix is assumed to be symmetric (or
Hermitian if complex) and only its lower triangle is used. If
'symmetric' is not specified, the matrix is inspected for
symmetry.
I think that could mislead a naive reader as it suggests that, with symmetric=TRUE,
the result of eigen() (vectors and values) depends only on
2005 Mar 01
2
almost lower triangular matrices
I have output from a program which produces a distance matrix I want to
read into a clustering program in R.
The output is a .txt file and is 'almost' lower triangular in the sense
that it is just the triangle below the diagonal.
So for example a 4-by-4 distance matrix appears as,
1
2 3
4 5 6
i.e. it looks like a lower triangular of a 3-by3.
I thought I might be able
2010 Mar 12
3
how to plot only the upper triangle using the pairs function?
Hi,
I am trying to use function pairs to plot the scatterplot, but I only want
to keep the upper triangle, what's the argument to do this?
Thanks,
-Jack
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2002 Dec 20
1
lower triangle
Hi,
I want to compute the lower triangle of a square matrix (optionally, sans
diagonal). With for() loops I can do something like this:
## 5 by 5 matrix rtn
for (j in 1:5) {
for (k in 1:j) {
if (j != k) { ## optional
rtn[j, k] <- my.func(j, k)
}
}
}
I'd like to do this with apply(). Is there some way I can do this kind of
'short-circuit'?
Thanks,
Mark Wilkinson
2004 Sep 23
7
decompose a correlation matrix
Is there a simple way to decompose the upper triangle
of a correlation matrix to a linear list;
For example:
X Y Z
X 1 2 3
Y 2 1 4
Z 3 4 1
so you get a list like:
xy 2
XZ 3
YZ 4
I suspect you can do it with a matrix transformation, but
that beyond me at present.
Many thanks
Mark
_________________________
Department of Molecular and Human Genetics,
Baylor College of Medicine,
2010 Sep 02
2
lower triangle of the correlation matrix with xtable
Dear all,
mydata<-data.frame(x1=c(1,4,6),x2=c(3,1,2),x3=c(2,1,3))
cor(mydata)
x1 x2 x3
x1 1.0000000 -0.5960396 0.3973597
x2 -0.5960396 1.0000000 0.5000000
x3 0.3973597 0.5000000 1.0000000
I wonder if it is possible to fill only lower triangle of this
correlation matrix? Using 'dist' doesn't seem to be useful as it doesnt
allow to convert this table
2011 May 13
2
How to store a triangular matrix
Hello, I want to create a triangular matrix and only keep the lower triangle entries without having to allocate memory for the whole matrix, is there any way I can do something like
A<-matrix(data, nrow=50)
but for a triangular matrix?
Thanks
ERV
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