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It doesn't seem too hard to come up with plausible ways in which this could give bad results. Suppose I sample rows from a large dataset, maybe for bootstrapping. Suppose the rows are non-randomly ordered, e.g. odd rows are males, even rows are females. Oops! Very non-representative sample, bootstrap p values are garbage. David On Wed, 19 Sep 2018 at 21:20, Duncan Murdoch <murdoch.duncan

On 19/09/2018 5:57 PM, David Hugh-Jones wrote: > > It doesn't seem too hard to come up with plausible ways in which this > could give bad results. Suppose I sample rows from a large dataset, > maybe for bootstrapping. Suppose the rows are non-randomly ordered, e.g. > odd rows are males, even rows are females. Oops! Very non-representative > sample, bootstrap p values are

Dear useRs, I'm having trouble building R packages in Windows 7 regarding HTML help Workshop. Pointing PATH to c:\Program Files\HTML help Workshop does work in Windows (e.g. Vista) and does not in Windows 7. Some tips?? Kind regards, -- Dr Eric B Ferreira Exact Sciences Department Federal University of Alfenas Brazil [[alternative HTML version deleted]]

Hi Duncan-- Nice simulation! The absolute difference in probabilities is small, but the maximum relative difference grows from something negligible to almost 2 as m approaches 2**31. Because the L_1 distance between the uniform distribution on {1, ..., m} and what you actually get is large, there have to be test functions whose expectations are quite different under the two distributions.

A quick point of order here: arguing with Duncan in this forum is helpful to expose ideas, but probably neither side will convince the other; eventually, if you want this adopted in core R, you'll need to convince an R-core member to pursue this fix. In the meantime, a good, well-tested implementation in a user-contributed package (presumably written in C for speed) would be enormously

On 19/09/2018 3:52 PM, Philip B. Stark wrote: > Hi Duncan-- > > Nice simulation! > > The absolute difference in probabilities is small, but the maximum > relative difference grows from something negligible to almost 2 as m > approaches 2**31. > > Because the L_1 distance between the uniform distribution on {1, ..., m} > and what you actually get is large, there

For a well-tested C algorithm, based on my reading of Lemire, the unbiased "algorithm 3" in https://arxiv.org/abs/1805.10941 is part already of the C standard library in OpenBSD and macOS (as arc4random_uniform), and in the GNU standard library. Lemire also provides C++ code in the appendix of his piece for both this and the faster "nearly divisionless" algorithm. It would be

No, the 2nd call only happens when m > 2**31. Here's the code: (RNG.c, lines 793ff) double R_unif_index(double dn) { double cut = INT_MAX; switch(RNG_kind) { case KNUTH_TAOCP: case USER_UNIF: case KNUTH_TAOCP2: cut = 33554431.0; /* 2^25 - 1 */ break; default: break; } double u = dn > cut ? ru() : unif_rand(); return floor(dn * u); } On Wed, Sep

You are right. I do take backups. But, this time I was too sure that nothing will go wrong. But, this was over-confidence. I need to take more care in future. Thanks anyway. With regards, Dr. A.K. Singh On Thu 26 Apr, 2018, 11:49 PM Duncan Murdoch, <murdoch.duncan at gmail.com> wrote: > On 26/04/2018 1:54 PM, Akhilesh Singh wrote: > > My thanks to Dr. John Fox and Dr. Duncan

My thanks to Dr. John Fox and Dr. Duncan Murdoch. But, I have upgraded all my R-3.4.3 libraries to R-3.5.0, and I have not backed-up copies of old version. So, I would give a try each to the solutions suggested by John Fox and Dengan Murdoch. With regards, Dr. A.K. Singh On Thu 26 Apr, 2018, 9:44 PM Duncan Murdoch, <murdoch.duncan at gmail.com> wrote: > On 26/04/2018 10:33 AM, Fox,

Dear all, when I start R, I want that the console window should be in the Maximized size automatically. Can somebody help me how to achieve that? Thanks and regards,

Duncan, do you think it's worth to comment this in R-devel list? Iago ________________________________ De: CALUM POLWART <polc1410 at gmail.com> Enviat el: divendres, 9 de febrer de 2024 18:28 Per a: Duncan Murdoch <murdoch.duncan at gmail.com> A/c: Iago Gin? V?zquez <iago.gine at sjd.es>; r-help at r-project.org <r-help at r-project.org> Tema: Re: [R] Avoiding Delete

John MacFarlane, the author of Pandoc, has been working on a project ( http://commonmark.org/) to define a standard reference for Markdown*. There are already two reference implementations, one in javascript, the other in C: https://github.com/jgm/cmark Regards, baptiste * There was some initial controversy with the original author of markdown, but in the long term it's probably one of the

On 2/9/24 21:39, Iago Gin? V?zquez wrote: > Duncan, do you think it's worth to comment this in R-devel list? Duncan filed a bug report via R bugzilla (thanks). There is no way to disable this functionality and it has existed for very long time, I tested that at least in R 3.0. Optionally ending the session was I believe intentional with Ctrl+D, when the input is empty, and it is also

On 26/04/2018 1:54 PM, Akhilesh Singh wrote: > My thanks to Dr. John Fox and Dr. Duncan Murdoch. But, I have upgraded > all my R-3.4.3 libraries to R-3.5.0, and I have not backed-up copies of > old version. So, I would give a try each to the solutions suggested by > John Fox and Dengan Murdoch. Here is some unsolicited advice: I would strongly recommend that you make it a higher

I tried the newest patch, but it does not seem to work for me (on Linux). Despite the check in Rconn_printf, the write.csv happily writes to /dev/full and does not report an error. When I added a printf("%d\n", res); to the Rconn_printf() definition, I see only positive values returned by the vfprintf call. Cheers, j. On 4 July 2017 at 21:37, Duncan Murdoch <murdoch.duncan at

I know I cannot be the only one who is not able to install the XML package from CRAN (zip or tar file) Many packages depend on this XML package. Can someone help me either access the source for a good binary? I have received no assistance from the author/developer of the package. Steven Steven D. Randolph Associate Consultant Enterprise Capabilities - Business Intelligence & Analytics Eli

I don't use term, but I've just tested it and this is reproducable. Is it a bug? Not sure. If you hit c after getting the message it will cancel the q() request. On Fri, 9 Feb 2024, 17:21 Duncan Murdoch, <murdoch.duncan at gmail.com> wrote: > That looks to me like a bug, but I don't use Windows any more, so I > won't offer to try to fix it for you. In fact I

If you're installing packages to the default location in your home account and you didn't remove those library folders, you still have you R 3.4 package installs there, e.g. > dir(dirname(.libPaths()[1]), full.names = TRUE) [1] "/home/hb/R/x86_64-pc-linux-gnu-library/3.4" [2] "/home/hb/R/x86_64-pc-linux-gnu-library/3.5" [3]

Congratulations Eva I have been following this thread loosely. Well in the sense that I really didn't understand what was going on but hopefully thinking that I could learn something from it. Your approach to your particular setup didn't pay any attention to the heed by Duncan. So you hard headed (pig headed, stubborn as a monkey) wanted it to be your way. Now I guess you accidentally