similar to: Visiting Researcher, species distribution modelling, Cali, Colombia

I am using nls to fit a non linear function to some data. The non linear function is: y= 1- exp(-(k0+k1*p1+ .... + kn*pn)) I have chosen algorithm "port", with lower boundary is 0 for all of the ki parameters, and I have tried many start values for the parameters ki (including generating them at random). If I fit the non linear function to the same data using an external

Dear friends, what is this error message in gam???? I cannot understand what it means .... is it a bug? gam_bray_scot24_pc_0505<gam(bray~s(PC1,PC2,PC3,PC4,PC5, PC1.1,PC2.1,PC3.1,PC4.1,PC5.1),data=dist_scot24_vector_with_climate) Error in if (length(data) != vl) { : missing value where TRUE/FALSE needed Calls: gam ... smooth.construct -> smooth.construct.tp.smooth.spec -> array In

My wife does and here's the problem. It automatically mounts the flash memory of the player. But it doesn't mount the SD card slot. I used Ubuntu 5.10 recently and it mounted both of them. Both as separate USB sticks. How do I get CentOS to do the same thing? Or can it not discern that two USB flash devices are plugged in? Preston

Dear friends, I am testing glm as at page 514/515 of THE R BOOK by M.Crawley, that is on proportion data. I use glm(y~x1+,family=binomial) y is a proportion in (0,1), and x is a real number. I get the error: In eval(expr, envir, enclos) : non-integer #successes in a binomial glm! But that is exactly what was suggested in the book, where there is no mention of a similar warning. Where am I

Dear list, I have a strange requirement .... I have a vector, for example v<- c(0,0,0,0,1,2,4,6,8,8,8,8). I have a value,for example x<- 4.8. I would like to understand in which sub interval of v is x. In this case, v would be in the sub interval [4,6] that is in the subinterval starting from element j=7 to the element j+1=8. Can we do that with an R command? Regards -- Corrado Topi

Dear R-friends, How do you test the goodness of prediction of a model, when you predict on a set of data DIFFERENT from the training set? I explain myself: you train your model M (e.g. glm,gam,regression tree, brt) on a set of data A with a response variable Y. You then predict the value of that same response variable Y on a different set of data B (e.g. predict.glm, predict.gam and so on).

Dear friends, Do you know how to calculate the CONCAVE hull of a set of points (2- dimensional or n-dimensional)? is that possible in R? (With a "smoothing" parameter of course). Best, -- Corrado Topi Global Climate Change & Biodiversity Indicators Area 18,Department of Biology University of York, York, YO10 5YW, UK Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk

This patch will improve the flow at disk_write_sectors and disk_read_sectors significantly, but it *will* introduce bugs if either of the above functions gets called before disk_get_params. --- com32/include/syslinux/disk.h | 21 +++++ com32/lib/syslinux/disk.c | 170 +++++++++++++++++++++-------------------- 2 files changed, 108 insertions(+), 83 deletions(-) diff --git

Dear friends, I have to use a very large matrix. Something of the sort of matrix(80000,80000,n) .... where n is something numeric of the sort 0.xxxxxx I have not found a way of doing it. I keep getting the error Error in matrix(nrow = 80000, ncol = 80000, 0.2) : too many elements specified Any suggestions? I have searched the mailing list, but to no avail. Best, -- Corrado Topi Global

This patch will improve the flow at disk_write_sectors and disk_read_sectors. It does that by creating a table of values respective to the operation. Besides, read and write operations are pretty similar to each other, so I redesigned the routines to avoid duplication. Signed-off-by: Raphael S.Carvalho <raphael.scarv at gmail.com> --- com32/include/syslinux/disk.h | 18 ++++

Here is a partial patch that I'm using to illustrate a few questions that I have. Looking at the gpllib write_sectors (com32/gpllib/disk/write.c) it looks like the allocated size is wrong; size is in sectors so we should adjust the alloc/memcpy by size*SECTOR. Also, comparing core/diskio.c it looks like the registers aren't even setup right. In the patch below I put an #if 0 around the

Dear R list, I just obtained a negative AIC for two models (-221.7E+4 and -230.2E+4). Is that normal? Regards -- Corrado Topi Global Climate Change & Biodiversity Indicators Area 18,Department of Biology University of York, York, YO10 5YW, UK Phone: + 44 (0) 1904 328645, E-mail: ct529 at york.ac.uk

Is there a way of removing all rows with missing values from a data frame? I usually use subset(x, var1!="NA") and repeat for each variable. It would be nice to be able to do it in one fell swoop. Also, surprisingly, it doesn't always work. Sometimes I'm left with an empty set even though not all rows have missing values for the variable. Cheers, mikkel Mikkel Grum,

Dear R-lings, I did not know which list to post to, because it is a studentship so not really a job, so it did not fit the r-sig-jobs list .... and it is about devloping an extension package interfaced with R .... I hope I did not upset anyone. If so apologies. The Centre For Complex systems Analysis at the University of York (YCCSA) in UK in collaboration with Stockholm Environment

Hello, the following patches should get multidisk access working. The syntax accepted is the following: (hdx,y)/path/to/file where x is the disk number and start at 0 and the y is the partition number starting at 1. So (hd0,1) is the first partition of the first disk. the other accepted syntax is using MBR's 32 bits disk signature so for example: (mbr:0x12345678,2)/foo/bar would address

Good afternoon Best regard I'm having trouble with a CentOS server release 5.10, so that my users connect via VPN Intranet type, I could not find a solution, if I can collaborate appreciate them, attached logs when it worked and now. Log running: Mon Oct 10 13:50:02 2016 193.60.90.72:23683 Re-using SSL/TLS context Mon Oct 10 13:50:02 2016 193.60.90.72:23683 LZO compression initialized Mon

I have two problems where I've come up with some code that will do the analysis that I want, but it looks pretty clumsy. In the first case, I calculate the variance on five different columns for each of 14 clusters and get them into one matrix. I get the job done, but I would have thought that it could be done in one or two lines, not six, and be generalized so that it didn't matter how

Hi List, Does any one know what package I need to use in order to fetch/get a large sized dataframe from SQL? I have already used sqldf package which is good for fetching large sized csv files. Thanks Alireza [[alternative HTML version deleted]]

Hi all, Working with S4 object, I definine two class foo1 and foo2. I define '[' (resp. '[<-') for the two classes. Then I define a third class foo3 that inherit from both foo1 and foo2. Is there a way to make '[' (resp. '[<-') for foo3 inherit from '[' (resp. '[<-') for foo1 and foo2? Thanks Christophe

From: Raphael S. Carvalho <raphael.scarv at gmail.com> My commit 09f4ac33 broke 'com32/lib/syslinux/disk.c' __lowmem doesn't work for declarations outside the core. Using __lowmem outside the core wouldn't have the desired effect, then lmalloc must be used instead to store dapa into the correct section (".lowmem"). Reported-by: Dark Raven <drdarkraven at