Hi Julia,
You seem to be looking for a test for trend in proportions in the
first question. Have a look at this page:
http://sphweb.bumc.bu.edu/otlt/MPH-Modules/BS/R/R6_CategoricalDataAnalysis/R6_CategoricalDataAnalysis6.html
The second question may require GLMs using experimental condition as a
Dear R-community,
Thanks for replying to my previous post. I would need some more help,
thoug.
I am performing statistical analysis on chidlren's accuracy rates as a
dependent variable and two predictor variables with two levels each (syntax
- subject vs object; internal NP position - pre vs pos
Also, out of interest, does anyone know of a test (or objective method) for
spatial autocorrelation for "gls" objects?
Thanks,
Ben Gillespie, Research Postgraduate
o---o
School of Geography, University of Leeds, Leeds, LS2 9JT
o
Hi there,
Does anyone know of a statistical test for heteroscedasticity for an object of
class "gls"? (or alternative objective methods).
Thanks in advance,
Ben Gillespie, Research Postgraduate
o---o
School of Geography, University
Hi,
In a data I have two predictors and one response variable. The response
variable is categorical and fixed. Now I want to choose which predictor
would better predict the response variable. Is there a statistical test for
that?
Best,
Jing
--
Jing Tang, PhD
Senior Researcher
Institute
Martin,
Pardon the delayed reply.
Bootstrap methods have been around for some time (late seventies?), but
their popularity seems to have exploded in correspondence with computing
technology. You should be able to find more information in most modern
books on statistical inference, but here is a b
Thank you Matta for the great suggestion,
I will try the additional tests. I have just been experimenting with the
e1071 package and the adjustedRand. It works perfectly, The only
outstadning question is interpretation - is there any rule of thumbs for
the level of agreement that needs to be re
Another useful measure to compare partitions is the adjusted Rand
index which is implemented in the library(e1071) within the
classAgreement function.
If you have your data partitions to be compared in a matricial form
(where each column is a different partition), the syntax is
ARI<-classAgreement(
On Nov 17, 2010, at 7:33 AM, Martin Tomko wrote:
> Dear all,
> I am having a hard time to figure out a suitable test for the match between
> two nominal classifications of the same set of data.
> I have used hierarchical clustering with multiple methods (ward, k-means,...)
> to classify my dat i
Thanks Mat,
I have in the meantime identified the Rand index, but not the others. I
will also have a look at profdpm, that did not pop-up in my searches.
Indeed, the interpretation is going to be critical... Could you please
elaborate on what you mean by the bootstrap process?
Thanks a lot for
There are several statistics used to compare nominal classifications, or
_partitions_ of a data set. A partition isn't quite the same in this
context because partitioned data are not restricted to a fixed number of
classes. However, the statistics used to compare partitions should also
work for the
Dear all,
I am having a hard time to figure out a suitable test for the match
between two nominal classifications of the same set of data.
I have used hierarchical clustering with multiple methods (ward,
k-means,...) to classify my dat into a set number of classesa, and I
would like to compare
Velappan Periasamy wrote:
How to find out if EURGBP is stationary?
Post the R codes for the same.
You have posted three similar messages which basically say, do my work
for me, I'm not prepared to even bother explaining my problem or situation.
You are unlikely to get any help without more
How to find out if GLD-GDX is cointegrating.
post the R codes.
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How to find out if EURGBP is stationary?
Post the R codes for the same.
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