On 11 Aug 2006, at 08:17, Prof Brian Ripley wrote: > Roger, thank you for looking into this.
Yes, and thanks to both of you for the corrections. > However, the posting guide asked the poster to contact the > maintainer. Had > (s)he done so, I would have pointed out that spatial 7.28-2 (the > current > version for R-devel) has this corrected (in a slightly simpler way). Thanks. There have been a few times when what I thought was a bug was due to a misunderstanding on my part. It seems better to me to check on the R-help list that it really is a bug before bothering the maintainers. On that note, I see that Prof. Ripley is the author of the loess package. When trying to adjust some of the control parameters for a loess fit, I tried the following (wrong) incantation. loess(dist ~ speed, cars, control = list(statistics = "exact")) Although it is wrong (should be control = loess.control(statistics = "exact")), entering this as a command actually crashes R on the 2 systems I have tried (OS X, linux, both R-2.3.1), with the error below. I'm not sure if you consider this a bug, as the command I typed was invalid. ------------------- *** caught segfault *** address (nil), cause 'memory not mapped' Traceback: 1: .C(R_loess_raw, as.double(y), as.double(x), as.double (weights), as.double(robust), as.integer(D), as.integer(N), as.double(span), as.integer(degree), as.integer(nonparametric), as.integer(order.drop.sqr), as.integer(sum.drop.sqr), as.double (span * cell), as.character(surf.stat), fitted.values = double (N), parameter = integer(7), a = integer(max.kd), xi = double (max.kd), vert = double(2 * D), vval = double((D + 1) * max.kd), diagonal = double(N), trL = double(1), delta1 = double (1), delta2 = double(1), as.integer(surf.stat == "interpolate/ exact")) 2: simpleLoess(y, x, w, span, degree, parametric, drop.square, normalize, control$statistics, control$surface, control$cell, iterations, control$trace.hat) 3: loess(dist ~ speed, cars, control = list(statistics = "exact")) Possible actions: 1: abort (with core dump) 2: normal R exit 3: exit R without saving workspace 4: exit R saving workspace ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
