similar to: Bug ? mine or ? in R core

In a C++ extension to R (v 1.8.1), I've been experimenting with a generic "push back" function to tack one value at a time onto the end of an R vector created within the extension. After calling this function a certain number of times Rgui.exe (I'm writing in Windows using Visual Studio .NET 2003) will fail with an Access Violation, which doesn't happen when I pre-allocate

Hi folks. I posted this question a few days ago, but maybe it got lost because of the code I included with it. I'm having a problem using the SET_LENGTH() macro in an R extension I'm writing in C++. In a function within the extension I use SET_LENGTH() to resize R vectors so as to allow the concatenation of single values onto the vectors -- it's a "push back" function to

Hello all, thanks for all the help on the other issues. This one should be relatively straightforward. I have a vector of integers which I allocate to be the maximal size possible (meaning I'll never see more than cel.GetNumOutliers, but most likely I'll see less) therefore, I want to resize the vector, one solution would be to allocate a new vector then to copy into the new vector. That

Hello. I'm trying to read a delimited file. I'm a little new to the R api. In the program, I do something like this... /*****************************/ SEXP retval; PROTECT(retval = allocMatrix(STRSXP,1,names.dim)); int r_eltctr = 0; while(!myfile.eof()) { SET_LENGTH(retval,r_eltctr+num_of_fields); for(int i = 0;numofcolumns; ++i) { INTEGER(retval)[r_eltctr++] = 1;/*some

Hello: I was hoping to get some advice about how to return a tree (basically a linked list -- with each node containing a parent, left, and right node pointers) from a C routine back into R. Each node itself contains several attributes (a double, a char *, an int, and a void * ) Initially I was thinking I could just return to R a SEXP containing a pointer to the Root Node, but then realized

Hello everyone, I met a strange problem when I call R expression from C++, here is the details: I edited a function eval_R_command(); double eval_R_command(const char *funcName) { SEXP exp,e; ParseStatus status = PARSE_OK; int i,n; double val; PROTECT(exp=NEW_CHARACTER(1)); SET_STRING_ELT(exp, 0, COPY_TO_USER_STRING(funcName)); PROTECT(e = R_ParseVector(exp, 1,

What is this error message about and how do I troubleshoot it? > sqlTables(channel) Error in .Call("RODBCFetchRows", attr(channel, "handle_ptr"), max, buffsize, : negative length vectors are not allowed The channel was created as such channel <- odbcConnect("Labdata") I think this is telling me that my odbcConnect command worked >

Hi, I want to read a text file into R with .Call(). So I define some NEW_CHARACTER() to store the chracters read and use SET_STRING_ELT to fill the elements. e.g. PROTECT(qNames = NEW_CHARACTER(10000)); char *foo; // This foo holds the string I want. while(foo = readLine(FN)){ SET_STRING_ELT(qNames, i, mkChar(foo))); } In this way, I can get the desired character from qNames. The only problem

Hello folks, I'm embarking on a project to embed R into the Apache web server, and I'd like your help. Currently, I'm looking for a way for R code to call back into a shared library from which the R shared library was loaded. Essentially, apache starts and loads mod_R.so which runs an initialization routine which calls Rf_initEmbeddedR() and the following code: /* override to

On Friday 18 December 2009 17:27, David Greene wrote: > > Here's the updated patch. > > Well, that didn't go through right. Here it is again. Argh! Stupid bug fixed. :) Index: include/llvm/Support/circular_raw_ostream.h =================================================================== --- include/llvm/Support/circular_raw_ostream.h (revision 0) +++

On Dec 18, 2009, at 3:46 PM, David Greene wrote: > > + /// circular_raw_ostream - A raw_ostream that saves its output in a > + /// circular buffer. A better description would be "which *can* save its data to a circular buffer, or can pass it through directly to an underlying stream if specified with a buffer of zero." When it is buffering, what causes it to flush? Your

On Friday 18 December 2009 13:56, David Greene wrote: > On Friday 18 December 2009 13:53, David Greene wrote: > > > > + void releaseStream() { > > > > + // Delete the stream if needed. Otherwise, transfer the buffer > > > > + // settings from this raw_ostream back to the underlying > > > > stream. + if (!TheStream) > > >

Hello, I am not able to query Sybase IQ database from R using RODBC package. Check the below code R> sybaseiq.query <- function (sql, ..., as.is = FALSE) { connstr <- "Driver={Sybase IQ};UID=ajadhav2;PWD=*****;ServerName=PSGSESHR01A_IQ;CommLinks=SharedMemory,TCPIP{host=psgseshr01_iq.sg.csfb.com;port=3051}" chan <- odbcDriverConnect(connstr)

On Friday 18 December 2009 17:22, David Greene wrote: > On Friday 18 December 2009 13:56, David Greene wrote: > > On Friday 18 December 2009 13:53, David Greene wrote: > > > > > + void releaseStream() { > > > > > + // Delete the stream if needed. Otherwise, transfer the > > > > > buffer + // settings from this raw_ostream back to

Hi all, Could anyone point me to one or more examples in the R sources of a C function that is called without knowing in advance what will be the length (say) of the output vector? To make myself clearer, we have a C function that computes probabilities until their sum gets "close enough" to 1. Hence, the number of probabilities is not known in advance. I would like to have an

On Friday 18 December 2009 19:47, Chris Lattner wrote: > On Dec 18, 2009, at 3:46 PM, David Greene wrote: > > + /// circular_raw_ostream - A raw_ostream that saves its output in a > > + /// circular buffer. > > A better description would be "which *can* save its data to a circular > buffer, or can pass it through directly to an underlying stream if > specified

Hello, i would like import Data from Sybase DataBase to R-1.5.0 via RODBC. With this i get a connection without problems ! channel <- odbcConnect("ODBCName","LoginName","LoginPass") dataSybase <- sqlFetch(channel,"EPORT_XYZ") ,but when i try this i get a message error ? (Perhaps the _ is a problem, i know that's i.e. not usual to name

On Wednesday 16 December 2009 13:35, David Greene wrote: > > Please make BufferSize an 'unsigned' and default it to 8192. Please use > > PRESERVE_STREAM instead of 'false'. Here's an updated version of the circular buffer. Ok to check in? -Dave Index: include/llvm/Support/circular_raw_ostream.h

On Dec 17, 2009, at 3:41 PM, David Greene wrote: > On Wednesday 16 December 2009 13:35, David Greene wrote: > >>> Please make BufferSize an 'unsigned' and default it to 8192. Please use >>> PRESERVE_STREAM instead of 'false'. > > Here's an updated version of the circular buffer. Ok to check in? This is looking a lot better, here are some more

On Friday 18 December 2009 12:28, Chris Lattner wrote: > This is looking a lot better, here are some more comments: > > + /// current_pos - Return the current position within the stream, > > + /// not counting the bytes currently in the buffer. > > + virtual uint64_t current_pos() { > > I didn't notice this earlier, but is there any reason for current_pos