Displaying 13 results from an estimated 13 matches for "jolc".
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jlc
2010 Jan 14
1
how to call a function from C
...ess the code above as :
Environment stats("package:stats") ;
Function rnorm = stats.get( "rnorm" )
return rnorm( 10, 0.0 ) ;
--
Romain Francois
Professional R Enthusiast
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http://romainfrancois.blog.free.fr
|- http://tr.im/KfKn : Rcpp 0.7.2
|- http://tr.im/JOlc : External pointers with Rcpp
`- http://tr.im/JFqa : R Journal, Volume 1/2, December 2009
2010 Jan 14
1
Logical function
Un texte encapsul? et encod? dans un jeu de caract?res inconnu a ?t? nettoy?...
Nom : non disponible
URL : <https://stat.ethz.ch/pipermail/r-help/attachments/20100114/da4bc580/attachment.pl>
2010 Jan 19
2
Working with text data/text operators
Hello,
Could someone tell me, how can I select from a dataframe only those columns whose names contain a certain text?
For example, if the column names are "Bond1.Creditclass","Bond1.Price","Bond2.Creditclass","Bond2.Price", how do I select only the columns corresponding to Bond1?
Thanks a lot,
Mihai
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2010 Jan 24
1
header files for R packages
I have 6 or 7 nice constants (for example 1852 meters per nautical mile)
I would like to have available to 4 or 5 functions in an R package. In
C this would just be a header .h file and I would just "include" I am
stuck trying to figure out how to create something like a C header file
for an R package. Any ideas?
2010 Feb 01
1
Number with fixed digit length - zero fill-up
Dear R-help members,
I'm quite new to R and I apologize for my basic question, but I haven't
been able to find a solution yet.
I try to interpret vector entries as a binary code, but unfortunately
every first digit which is zero disappears.
So how can I set any number (e.g. x = 10110) to a 8-digit zero fill-up (x
= 00010110) in order to address digit indices?
Or other way round, how
2010 Jan 09
1
Is nested namespace supported?
Could somebody let me know if there is nested name space supported?
For example, is it possible to define a function in the name space
'nested_namespace' which is nested in the name space 'some_namespace'?
some_namespace:::nested_namespace:::a_function()
I checked Section 1.6 of R-exts.pdf. It seems that nested namespace is
not supported, right?
2010 Jan 26
4
Error with toString
Hello there, I want to create a string from strings and numbers, here is my
code:
str <- "name" & toString(20)
but it returns me this error:
Error in toString(20) : could not find function ".jcall"
what did I do wrong? I couldn't find this error anywhere...
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2010 Jan 26
4
reading a string vector
Hi, I need to read a string vector in R which is like this
"atgctaaaactaatcgtcccaacaattatattactaccac", but R seems to understand it as
a unique vector input when I read in like x <-
"atgctaaaactaatcgtcccaacaattatattactaccac". How do I unconcatenate it, so I
can use each of the letters on my reading?
Thanks,
Beatriz
--
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2010 Jan 23
1
matrix to a C function
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.
2010 Feb 08
5
Fast way to determine number of lines in a file
Hi all,
Is there a fast way to determine the number of lines in a file? I'm
looking for something like count.lines analogous to count.fields.
Hadley
--
http://had.co.nz/
2010 Jan 22
2
Optimizing C code
Hi the list,
I need to write some efficient distances function, so I read the code
for the Euclidean distance.
I do not understand the purpose of the line 11 : if x[i] and y[i] are
not NA (line 9), can dev be NA ?
Christophe
#define both_FINITE(a,b) (R_FINITE(a) && R_FINITE(b))
#define both_non_NA(a,b) (!ISNAN(a) && !ISNAN(b))
1. static double R_euclidean2(double *x, double
2010 Jan 22
2
R CMD check error with the GNU Scientific Library
I have been working on an R package that calls C code using .C(). I recently
started including some functions from the GNU Scientific Library in my code.
The code runs fine on my machine when not wrapped in the package. But I get the
following error from "R CMD check"
* checking whether the package can be loaded ... ERROR
Loading required package: splancs
Loading required package: sp
2010 Jan 14
5
Better way than an ifelse statement?
Hello All,
I am trying to create a column of weights based off of factor levels
from another column. I am using the weights to calculate L scores.
Here is an example where the first column are scores, the second is my
"factor" and the third I want to be a column of weights. I can do
what I want with an ifelse statement (see below), but I am wondering
if anyone knows of a cleaner way