Richard Bonneau <[EMAIL PROTECTED]> writes: > Hi, > > I'm using gl1ce with family=binomial like so: > >yy > succ fail > [1,] 76 23 > [2,] 32 67 > [3,] 56 43 > ... > [24,] 81 18 > > >xx > c1219 c643 > X1 0.04545455 0.64274145 > X2 0.17723669 0.90392792 > ... > X24 0.80629054 0.12239320 > > >test.gl1ce <- gl1ce(yy ~ xx, family = binomial(link=logit), bound = > 0.5 ) > or > >omit <- c(2,3) > >test.gl1ce <- gl1ce(yy[-omit,] ~ xx[-omit,], family = > binomial(link=logit), bound = 1 ) > > this seems to work fine and as i change the shrinkage parameter > everything behaves as expected. > > if i try to get the fitted values (y-hat) using predict i have no > problems: > > predict.gl1ce(test.gl1ce) > [1] 0.38129977 0.16513661 0.47666779 0.45348757 0.09916513 0.18167674 > [7] 0.11047684 0.15786664 0.14765670 0.40657031 0.19072570 0.80259477 > [13] 0.36317090 0.35930557 0.23700520 0.17579282 0.18835043 0.52306049 > [19] 0.28388953 0.41262864 0.29933710 0.43556139 0.15276727 0.73017401 > > *** > I have problems, however, when i try to use predict.gl1ce() with > newdata. > > so, the following tries all give errors: > > predict.gl1ce(test.gl1ce, xx, family=binomial(link-logit)) > > predict.gl1ce(test.gl1ce, xx) > > predict.gl1ce(test.gl1ce, xx[omit,], family=binomial(link-logit)) > Error in predict.l1ce(test.gl1ce, xx, family = binomial(link - logit)) : > Argument `newdata' is not a data frame, and cannot be coerced > to an appropriate model matrix > > the following weak try also bombs: > > predict.gl1ce(test.gl1ce, data.frame(xx), family=binomial(link-logit)) > Error in eval(expr, envir, enclos) : attempt to apply non-function > > > I've tried quite a few variations. It seems I'm missing something, but > if glm or gl1ce take a certain > data format then the corresponding predict me,thods should (what am i > missing).
1. try link=logit, as opposed to what you typed 2. xx is probably not a data frame (or yy~xx would unlikely work), so as.data.frame might do the trick. 3. what is gl1ce? I you're having trouble with an add-on package, you might have the courtesy to tell us which one. Not everyone uses lasso2 on a daily basis, you know. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help