OK, I stand corrected, my previous post generated a point on an ellipsoid as a
proyection of an uniform random point in a sphere.
now, to generate a random point in a sphere I generate an uniform on one axis
and an uniform angle in the second, since the sphere has the property that the
perifery
Hello,
I do not know if I am completely out of it but . . .
if x,y,z is a point in a sphere and [u,v,w]'A[u,v,w] = 1 is the equation of an
ellipsoid and A = T'T (cholesky) then
T.[x,y,z] should be a point in the ellipsoid ? isn't it?
Heberto Ghezzo
McGill University
Montreal Canada
_
Hello,
I have some problems trying to write up the formula for lmer.
I have 43 subjects ( random factor) which were seen twice ( Visit : repeated
measure - fixed). on each visit the patient performed a graded effort exercise
( effort : repeated measures, ordered, fixed 4 levels).
So Subject is a
Hello,
I am in Win-XP R:2.3.0
latest rtools and Perl - of today
I got Rcmdr.HH source code and tried to compile it myself
copy all directory to R/R-2.3.0/src/library/Rcmdr.HH
from R/R-2.3.0/src/library
I typed:
..\..\bin\R CMD build --force --binary --auto-zip Rcmdr.HH
* checking for file 'Rcmdr.HH
HI, just my 2 cents. Bonferroni et al, assume independent tests, thus p ~ p*k
with k the number of tests, in repeated measures, each measure is correlated
with the previous, so k is not 2 but 2-q. I do not know q but it should be a
function of the correlation between measures, ie the Sigma in ge
Hello,
I just downloaded RW1090. No problems. My thanks to everybody involved in the
project. I work in Win98
I updated my library, some problems with some files that were in the PACKAGES list
but not in 1.9/ site, now all are.
I tried to install "Zelig" from Harvard
install.packages("Zelig",CRAN="
Hello.
I am using R 1.7.1 just downloaded on Win98. With the old 1.6.2 I had
modified the etc/Rprofile file as
etc/Rprofile
# Things you might want to change
# options(width=80)
# options(papersize="a4")
# options(editor="notepad")
# options(pager="internal")
# to prefer Compiled HTML help
options
Hello, I have some problems with RODBC and Excel in Win98
I am using R 1.6.2 and just upgraded RODBC to the last version on CRAN.
I have an Excel file with columns Number, Name, Sex, Age, FEV1 on Sheet
1 and Number, Age, FEV1, Name, Sex on Sheet 2.
Now I open the channel to the file
> chan1 <- odbc
