similar to: Pass String from R to C

Hi, I am new to R and I want to know how to use C code which contains two functions one called inside another.I know that how to use C code in R if it has only one function but dont know how to do it in above case. I want to use the same in R .My C code is as follows. //#include <R.h> void sayHello(); void g(); void sayhello() { Rprintf("Hello world %d\n",global); } void

Hi, I have a C code which produces array of integers and potentially a string, and I have problems passing the string out. Here is the relevant part of the code: 1 PROTECT(Ret = allocVector(INTSXP, n)); 2 ret = (int*) INTEGER(Ret); /* get pointer to R's Ret */ 3 for(i=0; i<n; i++) ret[i] = data[i]; 4 Free(data); 5 i=1; 6 if (comment) { // comment was found 7 n

Hi, I have a C code which produces array of integers and potentially a string, and I have problems passing the string out. Here is the relevant part of the code: 1 PROTECT(Ret = allocVector(INTSXP, n)); 2 ret = (int*) INTEGER(Ret); /* get pointer to R's Ret */ 3 for(i=0; i<n; i++) ret[i] = data[i]; 4 Free(data); 5 i=1; 6 if (comment) { // comment was found 7 n

Hi, I am new to R and I want to plot points on the Map of New York . I also want to divide map of New York into small grids(not fixed) .I want that these point should be plotted from a file.How can I do it?Any help would be greatly appreciated. Thanks Jaimin [[alternative HTML version deleted]]

I am new to R.I want to draw grid from a csv file which contains latitude minimum ,latitude maximum ,longitude minimum ,longitude maximum.The grid should be divided into exactly 4 quadrants. The map is of NY state of USA. I want to know how can I do it. Help would be appreciated. Thanks Jaimin [[alternative HTML version deleted]]

I'm trying to find information about how to use Rprintf with a UTF-8 encoded string, and I'm not sure what the right cross-platform usage is. I found an earlier thread about this (http://r.789695.n4.nabble.com/How-to-print-UTF-8-encoded-strings-from-a-C-routine-to-R-s-output-td4724337.html) but it wasn't very helpful. If I want to print a UTF-8 string, I can do one of the

Hello all, I am using Rprintf in a C for loop (from .Call) to print a progress indicator showing the current percent complete. The loop I am doing is an time intensive call to another function. I have noticed that Rprintf does not print to the R-window until the entire loop has been completed. When it reaches the end of the loop it suddenly prints 0 percent to 100 percent in a split second.

Hi , I have a function which passes a vector from R to C. However the size of the vector is decided inside the c program. But as I have to pass the size while calling the function from R lot of my space is getting wasted. Is there any other alternative? I call c function as :

Hi, I am currently writing an extension for R and have the need to include some C code. If I call the code with a large amount of data then it can take several minutes to complete. The C code prints out after a certain iteration hence letting the user know it hasn't crashed. When running in R this generally does not happen and all is printed out at the end once the program has completed

Dear Group, I'm trying to build a set of new graphic device drivers. I use the devNull example a a beginning point: $ R CMD SHLIB devNull.c gcc -shared -L/usr/local/lib -o devNull.so devNull.o (everything works OK) $ R CMD SHLIB devNull.cpp g++ -shared -L/usr/local/lib -o devNull.so devNull.o (everything works OK) The difficulties start when trying to compile manually. I compile the

Thank for Brian D. Ripley for the answer to my previous question. My aim is to print single values from different real vectors with different digits option. This is quite a possible with Rprintf() but that one supprots printing format as C does, not in R native way (setting digits=7 or printing with "%12.7f" are two quite different things). So I would like to find something more

Hi the list, I need to include some C code in R, but the behavior of the C code is strange : Here is my code : --- 8< --- Rprintf("\n XXXX mTraj=%f mClus=%f",mTraj[i+nbId*c],mClustersCenter[j+nbClusters*c]); Rprintf("\nDistA=%d Tmp=%d",dist,tmp); tmp = mTraj[i+nbId* c] - mClustersCenter [j+nbClusters* c]; Rprintf("\nDistB=%d

Hi the list, Is there a way to give a matrix to a C function, and then to use it as a matrix ? I write a function to print a matrix, but I use it as a vector : 1. void printMatrix(double *mTraj,int *nbCol, int *nbLigne){ 2. int i=0,j=0; 3. for(i=0 ; i < *nbLigne ; i++){ 4. for(j=0 ; j < *nbCol ; j++){ 5. Rprintf(" %f",mTraj[i * *nbCol + j]); 6. } 7.

Dear R users, I want to call C code via the .C or .Call interface. This works fine with integer values but using doubles the array received in C will be set to zeros. I have tried the convolve examples (Writing R extensions, chapter 5.2) and still the resulting array consists of zeros. My code (shortened for my purposes. Original did not work either):

Thanks, That fixed the problem. Jarek -----Original Message----- From: ripley at stats.ox.ac.uk [mailto:ripley at stats.ox.ac.uk] Sent: Friday, July 15, 2005 11:11 AM To: Tuszynski, Jaroslaw W. Cc: r-devel at stat.math.ethz.ch Subject: Re: [R] Passing character strings from C code to R Reading the posting guide would have shown you that R-help was quite inappropriate, so I have moved this to

Dear all, I recognise the reason for strongly discouraging use of printf() and similar C functions in R packages, but I wonder what people do in practice about third-party code which may be littered with such calls. I maintain a package (RNiftyReg) which provides an R interface to a third-party library which contains hundreds of calls to printf(...), fprintf(stderr,...) and similar. It seems to

Hi the list, I am writing a R function that call a C function. The C function needs integers but I do not manage to give a NA integer as argument : --- C code --- void essai(int *t){ Rprintf("\nT0=%i T1=%i T2=%i T3=%i",t[0],t[1],t[2],t[3]); } --- R --- boub <- c(1,2,3,4) .C("pour",as.integer(boub),NAOK=TRUE) # T0=1 T1=2 T2=3 T3=4[[1]] # [1] 1 2 3 4 boub <-

Hi All, The first time i noticed this problem is when i enabled some debug prints in memory.c DEBUG_GC DEBUG_ADJUST_HEAP DEBUG_RELEASE_MEM etc.. These have some prints for debugging .Base R package installation completes well and good. The problem comes when some of the Recommended package installation happens. The following Packages fail "KernSmooth,lattice,rpart,cluster,survival

Dear R-devel, I am now at a debugging phase, and would like to inspect the (individual) values in an arbitrary R vector. It should be simple, but after hours of reading I am simply unable to find the right information. A possible C code is: ????????????????? # include <R.h> # include <Rinternals.h> # include <R_ext/Rdynload.h> SEXP foo(SEXP x) // where x is a vector passed by

Dear R contributors, Considering the following sample C code, that illustrates two possible uses of a Cholesky decomp for inverting a matrix, equally valid at least in theory: SEXP test() { int d = 2; int info = 0; double mat[4] = {2.5, 0.4, 0.4, 1.7}; double id[4] = {1.0, 0.0, 0.0, 1.0}; double lmat[3]; F77_CALL(dpotrf)("L", &d, mat, &d, &info); lmat[0] = mat[0]; lmat[1]