Displaying 7 results from an estimated 7 matches for "cmdexpr".
2008 Aug 04
2
Parsing code with newlines
Dear List,
When I try to parse code containing newline characters with R_ParseVector, I
get a compilation error. How can I compile code that includes comments and
newlines?
I am using the following:
void* my_compile(char *code)
{
SEXP cmdSexp, cmdExpr = R_NilValue;
ParseStatus status;
PROTECT (cmdSexp = allocVector (STRSXP, 1));
SET_STRING_ELT (cmdSexp, 0, mkChar (code));
PROTECT (cmdExpr = R_ParseVector (cmdSexp,-1,&status,
R_NilValue));
UNPROTECT_PTR (cmdSexp);
if (status != PARSE_OK) {
return (voi...
2012 Feb 01
3
Crash in R using embedded.
.../R");
const char *R_argv[]= {"RInterfaceTest", "--gui=none", "--no-save",
"--no-readline", "--silent"};
Rf_initialize_R(sizeof(R_argv)/sizeof(R_argv[0]), const_cast<char
**>(R_argv));
setup_Rmainloop();
ParseStatus status;
SEXP cmdSexp, cmdexpr = R_NilValue;
int error;
string rcommand = "f<-file(paste(tempdir(), \"/Routput.txt\", sep = \"\"),
open=\"wt+\")\nsink(f)\n";
PROTECT(cmdSexp = allocVector(STRSXP, 1));
SET_STRING_ELT(cmdSexp, 0, mkChar(rcommand.c_str()));
cmdexpr = PROTECT(R_ParseVector...
2013 Oct 16
1
Parallel R expression evaluations
...ndVar' is not an environment
I am using the following code snippet for initializing R, parsing and
evaluation of R expression
// For initialization
int res= Rf_initEmbeddedR(R_argc, (char**)R_argv);
// For parsing and evaluation
SEXP cmd1= Rf_mkChar(rscript);
SEXP cmdSexp, cmdexpr, sresult = R_NilValue;
ParseStatus status;
R_len_t i=0;
PROTECT(cmdSexp = Rf_allocVector(STRSXP, 1));
SET_STRING_ELT(cmdSexp, 0, cmd1);
// parsing vector for R expressions
cmdexpr = PROTECT(R_ParseVector(cmdSexp, -1, &status, R_NilValue));
if (status != PARSE_OK) {
UNPROTECT(2);
//...
2009 Jan 08
1
Callbacks seems to get GCed.
...v, &errorOccurred);
UNPROTECT(1);
}
void r_trigger_callback2()
{
int errorOccurred;
SEXP f = NULL;
f = allocVector(LANGSXP, 1);
SETCAR(f, callback2);
PROTECT(f);
R_tryEval(f, R_GlobalEnv, &errorOccurred);
UNPROTECT(1);
}
void r_exec(char *code)
{
SEXP cmdSexp, cmdExpr = R_NilValue;
ParseStatus status;
int i,errorOccurred;
SEXP e;
PROTECT (cmdSexp = allocVector (STRSXP, 1));
SET_STRING_ELT (cmdSexp, 0, mkChar (code));
PROTECT (cmdExpr = R_ParseVector (cmdSexp,-1,&status,R_NilValue));
UNPROTECT_PTR (cmdSexp);
if (status == PARSE_OK)...
2009 Sep 03
1
Running an expression 1MN times using embedded R
..._ELT( mess , 0));
// fwrite(&SET_STATUS,sizeof(uint8_t),1,stderr);
// uint32_t stle = strlen(status);
// uint32_t len_rev = reverseUInt(stle);
// fwrite(&len_rev,sizeof(uint32_t),1,stderr);
// fwrite(status,stle,1,stderr);
}
SEXP rexpress(const char* cmd)
{
SEXP cmdSexp, cmdexpr, ans = R_NilValue;
int i,Rerr;
ParseStatus status;
PROTECT(cmdSexp = Rf_allocVector(STRSXP, 1));
SET_STRING_ELT(cmdSexp, 0, Rf_mkChar(cmd));
cmdexpr = PROTECT(R_ParseVector(cmdSexp, -1, &status, R_NilValue));
if (status != PARSE_OK) {
UNPROTECT(2);
return(R_NilValue)...
2008 Jul 18
0
Rcpp from C++
...R-variable you should be able to use the constructors
from Rcpp that take an SEXP as argument, but i also haven't tried that yet.
What I found to be useful too is the routine for evaluating R-commands:
//evaluating commands
int errorOccurred;
ParseStatus status;
SEXP cmdSexp, cmdexpr, ans = R_NilValue;
PROTECT(cmdSexp = Rf_allocVector(LANGSXP, 1));
char* cArr[4];
cArr[0] = "a <- seq(1,20)";
cArr[1] = "b <- seq(1,20)";
cArr[2] = "c <- a+ b";
cArr[3] = "print(c)";
for (int CommandInd = 0; CommandInd<...
2008 Sep 03
8
suggestion of new API function for embedded programming.
While doing some embedded programming and trying to figure out how to generate
a hand coded SEXP equivalent of the line
"t.test(x,conf.level=(1-p))$conf.int[2]" I had an idea for an addition to the
embedded API.
There are a number of hidden or static parse functions (R_ParseBuffer,
R_Parse1Buffer, etc.) which take an IoBuffer* and returns a parsed tree. If
one or more of these