Displaying 6 results from an estimated 6 matches for "pietr007".
2013 Sep 03
1
tm::stemDocument function not work
https://gist.github.com/rpietro/6430771
stemDocument function doesn't seem to be working. Tried to look up and
a few people have reported the problem, but no solution that I could
find.
would appreciate any help
2008 Jun 09
2
converting a data set to a format for time series analysis
I currently have a data set describing human subjects enrolled into an
international clinical trial, the name of the hospital enrolling this
human subject, the date when the subject was enrolled, and a vector
with variables representing characteristics of the site (e.g., number
of beds in a hospital). my data sets looks like this:
subject hospital date_enrollment hospital_beds
1 hospitalA
2007 Oct 21
4
Input appreciated: R teaching idea + a way to improve R-wiki
Hi all,
I will be teaching a graduate-level course on R at CU Boulder next
semester. I have a teaching idea that might also help improve the R
wiki page... I wanted to know what you all thought of it and wanted to
solicit some advice about doing it.
During the latter part of the course, students will choose a topic of
interest (e.g., hierarchical linear modeling), and show how to achieve
it in
2006 May 19
1
factor analysis - discrepancy in results from R vs. Stata
Hi,
I found a discrepancy between results in R and Stata for a factor analysis
with a promax rotation. For Stata:
. *rotate, factor(2) promax*
(promax rotation)
Rotated Factor Loadings
Variable | 1 2 Uniqueness
-------------+--------------------------------
pfq_amanag~y | -0.17802 0.64161 0.70698
pfq_bwalk_~ΓΈ | 0.72569 0.05570
2008 May 05
1
computational ontology to research questions, and statistical methods
our group at Duke is currently attempting to connect two data sets fed
through a web-based system, one containing research questions (i.e.,
variables positioned with certain roles) and a database of statistical
methods. this connection is done informally in a number of R packages
and related software such as Rcmdr, R4calc, and Rkward where a
variable of a certain type is matched to a certain
2007 Oct 08
2
R and FDA trials
Yesterday I just noticed the new document on R and regulatory aspects
for biomedical research posted at
http://www.r-project.org/doc/R-FDA.pdf
Coming from an institution that performs a large number of clinical
trials for FDA and being an advocate of R myself, I have found that
the following issues usually come up when discussing the use of R for
FDA trials:
1. Most FDA submissions come down to