search for: amatulli

Displaying 2 results from an estimated 2 matches for "amatulli".

2013 Jan 26
2
confidence / prediction ellipse
...sqrt(dfn * qf(level, dfn, dfd)) conf.elip = ellipse(center, shape, radius,draw = F) plot(conf.elip, type='l') points(a,b) My question is how I can calculate shape, center and radius to obtain a prediction ellipses rather than a confidence ellipse? Thanks in Advance Giuseppe -- Giuseppe Amatulli Web: www.spatial-ecology.net [[alternative HTML version deleted]]
2010 Aug 05
2
linear model with similar response predictor
...mber and so with very small numbers for calculating the coefficients. Moreover also Intercepts is wrong it should be equal to 0. I compile the R 2.11.1 in the Fedora 13. Should i download a library? Some configure options are missing during the installation? or is a bug? Thanks in advance Giuseppe Amatulli