Cyril Iaconelli

10 Questions 84 Answers 0 Followers

Questions related from Cyril Iaconelli

When can we consider ANOVA robust enough in front of normality and homoscedasticity rejection ?

This is a question of "non-respect" of hypothesis for tests based on linear model (ANOVA, regression...).- What calculation give a good idea of the ANOVA robustness ?- I'm sure the "magic...

03 March 2016 2,864 17 View

ASA and p-values: towards the revelation of beta (eg. 1-beta = power of the test) values in future papers ?

Dear all,I'm sure that many of you noticed the recommandation of ASA about the use of p-values (http://www.amstat.org/newsroom/pressreleases/P-ValueStatement.pdf).It is now clear that p-value can...

03 March 2016 8,468 9 View

Equivalent of the Matlab fminsearch function in R ?

I'm usually fitting curve on Matlab using "fminsearch" function, which is a really useful and powerful function.As I'm currently more using R than Matlab... I wonder if that kind of function or...

10 October 2014 1,315 6 View

Does it exist a free book on case studies solved with Bioconductor ?

I installed Bioconductor few weeks ago and found some exercises on the internet. However, I'm interested in a free book (or document or internet website etc.) gathering many solved case studies in...

09 September 2014 7,022 0 View

Can a post-hoc test (tuckey LSD) fail to find a significant difference when a ANOVA does find a significant difference ?

I saw many times a significant observation after post-hoc test when ANOVA results showed no significant observation. I'm just interested by the opposite (see above), because it never happened to...

09 September 2014 6,472 15 View

Does a tool (or an article) exist on in silico comparison of different genome/proteome of different organisms (preferably on bacteria) ?

I'm looking for a method to do an in silico genomic/proteomic analysis to compare the "genetic equipment" of organisms in a way to evaluate their possible abilities to respond to different...

09 September 2014 4,845 2 View

The choice of post-hoc test?

Because we are all more curious than we should be, ANOVA giving a p-value < 0.05 appear to be not sufficient.However it exists many ways to find what statistic group(s) is different from the...

07 July 2014 1,238 13 View

What is necessary to write down when your are doing a Principal Component Analysis ?

I'm finalizing an article where I found useful to used PCA to shows interaction between variables. However I found several papers using that tool and as many version to communicate on PCA...

07 July 2014 7,451 5 View

Is it "fair" and feasible to rotate the graphics of Principal Component Analysis?

Imagine a PCA with only 2 variables (V1 and V2), the variables factor map show a 90° between this two variables but both of the are explained equally by the first and second axis. I would like to...

05 May 2014 8,129 6 View

Is there alternative analysis to Principal Component Analysis (PCA)?

I would like to represent factors in functions of each other by doing a MANOVA where all factors would be the response and but also factors to see how they may interact each other. I would really...

04 April 2014 7,008 9 View