Displaying 7 results from an estimated 7 matches similar to: "About compositional data analysis"
2006 Oct 17
0
Are there ANOVA for compositional data?
The compositional data xi=(x_i1, x_i2,..., x_in), for each fixed i ,
xij>0, and sum(xij)=1;
I want to compare the mean( u_i) of several groups
i.e.
H0: u_1=u_2=...=u_N
or
Hj0: u_1j=u_2j=...=u_Nj
Are there any ANOVA tpye tools to do this work in R?
Thanks,
WEN S Q
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2003 Aug 15
2
Oja median
I discovered recently that the phrase "Oja median" produces no hits in
Jonathan Baron's very valuable R search engine. I found this surprising
since I've long regarded this idea as one of the more interesting notions
in the multivariate robustness literature. To begin to remedy this oversight
I wrote a bivariate version and then decided that writing a general p-variate
version
2005 Jan 09
0
dist{amap} error??
Dear all,
I have come across a very confusing matter regarding dist() supplied by
the amap package:
--- m is just a test matrix
> library(amap)
Loading required package: mva
Warning message:
package 'mva' has been merged into 'stats'
> m a b c
aa 0.1 0.2 0.3
bb 2.0 3.0 4.0
cc 2.0 4.0 6.0
dd 0.3 0.2 0.1
> ds<-dist(m,method="pearson")
>
2010 Aug 10
0
does libvirt support VHD disk tpye?
Sorry for my fault that I just sent this mail to xen-devel first.
Hi,everyone
I am trying to use VHD disk format on guestVM.
My environment is fedora12+ xen-4.0.1-rc6 + xen-stable/2.6.32.15+libvirt-0.8.3
I success on booting VM in VHD disk correctly using "xm create VM.cfg" and everything runs alright
Where disk = [
2006 Jun 27
1
compositional time series
Dear R users,
i am wondering if anyone has some hints for this problem (i have not found a clear answer after searching the R-mailing list archive, 'help.search' in R, and R-Wiki, and the like...):
let's assume that i have 4 periods compositional time series data:
t=1, A=0.1; B=0.5; C=0.4
t=2, A=0.2; B=0.4; C=0.4
t=3, A=0.5; B=0.3; C=0.2
t=4, A=0.4; B=0.3;
2003 Jun 01
6
compositional data: percent values sum up to 1
again, under another subject:
sorry, maybe an all too trivial question. But we have power data from J
frequency spectra and to have the same range for the data of all our
subjects, we just transformed them into % values, pseudo-code:
power[i,j]=power[i,j]/sum(power[i,1:J])
of course, now we have a perfect linear relationship in our x design-matrix,
since all power-values for each subject sum up
2005 Mar 10
7
Problem with apache in CentOS 4.0 (final)
Hi everyone!
In my new CentOS 4.0 (final ;-) I installed apache and activates
SELinux, When I
tried to enter a page of some user (localhost/~user) said to me that she
did not have permissions
to see it, and this was incorrect, because the permissions was 755
(/home/user/html). After awhile it was happened to me to deactivate
selinux and
I reinitiated the machine and I work!
Somebody knows why