Questions tagged [rcpparmadillo]
204 questions
2
votes
0 answers
How to call an R function from an R package in c++, store the result, and use it inside c++ for further processing
I want to load the rpart package in R from inside C++, use the rpart() function in the rpart package to fit a CART model from inside C++, call the result in C++, and store it for further processing. The code that I tried is given below. I am very…
aak201
- 21
- 2
2
votes
0 answers
Issues with building a package with Rstan and RcppArmadillo
I have experienced the following problem during the process of building my package. I tried to search for a solution but was unsuccessful. In order to make the error reproducible, I present a minimal package that could generate the same error.
I…
JKL
- 21
- 1
2
votes
1 answer
Not getting all() quicker using Rcpp
As I'm a bit new to Rcpp, I might be missing a trick here.
Let's create two matrices:
library(Rcpp)
library(microbenchmark)
P <- matrix(0, 200,500)
for(i in 1:500) P[,i] <- rep(rep(sample(0:1), 2), 25)
Parent_Check <- matrix(0, nrow(P),…
Nick
- 3,262
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2
votes
1 answer
Converting R matrix to arma::mat with List
I want to use arma::mat for my list of matrices.
Converting R matrix to arma::mat is working well with const.
But when i use List with matrices as an arguments, It takes very long time.
#include
//…
Youngsun Kim
- 41
- 2
2
votes
0 answers
matrix not symmetric warning in Armadillo is too strict
The last version of armadillo gives a warning of matrix not symmetric when using inv_sympd. However, the matrix is a cross-product so I am sure it is symmetric. When I print A-arma::trans(A) I get that all the elements are 0 except one that is…
Roberto
- 41
- 7
2
votes
1 answer
Subset vector by bool vector in Rcpp
I would like to subset a vector {1,2,3,4} with a bool vector. For instance, if my bool vector was {false,true,true,true}, I would like to get vector {2,3,4}. In regular R, I could do this with
sample_states<-c(1:4)[c(a,b,c,d)]
where a,b,c,d…
pestopasta
- 51
- 6
2
votes
1 answer
Having an issue with compiling RcppArmadillo - library gfortran not found
Running:
install.packages("RcppArmadillo")
I get the following errors:
ld: warning: directory not found for option '-L/usr/local/gfortran/lib/gcc/x86_64-apple-darwin15/6.1.0'
ld: warning: directory not found for option…
Learner
- 757
- 3
- 15
2
votes
1 answer
Applying a function over columns of matrix using RcppArmadillo works but returns error when applied over rows
I coded a function qSelectMbycol in Rcpp that returns the kth largest element of each column in O(n) time. This function works OK. If I try to do the same but work over rows instead of columns (function qSelectMbyrow) it returns the error "error:…
Tom Wenseleers
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1
vote
1 answer
Can't solve Valgrind memory issues in Rcpp code
I have posted my package on CRAN and recived Valgrind's check results revealing some memory leaks (link). Unfortunately, I can't reproduce these errors. Therefore, I have some hypothesis why these errors occur but can't test them. So I need an…
Bogdan
- 864
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1
vote
0 answers
Roxygen2 adds `import(RcppArmadillo)` to my `NAMESPACE`
Can I stop it?
That requires to add RcppArmadillo to Imports, when otherwise LinkingTo would be enough.
Does this already trigger Roxygen to do this?
#include "RcppArmadillo.h"
// [[Rcpp::depends(RcppArmadillo)]]
inferator
- 474
- 3
- 12
1
vote
1 answer
Translate outer() from base R to RcppArmadillo
Is there any way to efficiently translate the outer() function for multiplication of two vectors from R base to RcppArmadillo? I attempted to do so but it is not efficient at all.
Take the following…
J. Antonio Guzmán Q.
- 83
- 6
1
vote
1 answer
Rcpp function [actually not] much slower inside of package than outside
I recently wrote a compute intense function in Rcpp. Now, I would like to port this code to an R package. However, I notice that the code is much (~100x) slower when run inside an R package.
I already read here, that this may have to do with how the…
s1624210
- 627
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1
vote
1 answer
How to build a package with RcppArmadillo?
I wish to build a package, but I write part of it using RcppArmadillo and now I am suffering the consequences. I am using roxygen2 and devtools to help me with DESCRIPTION and NAMESPACE. I am coding in R / Ubuntu. In the DESCRIPTION I include two…
Ian Niewicz
- 11
- 1
1
vote
1 answer
Detecting R Version in Rcpp/arrayfire in makevars
I am new to building R packages so I need some help :) I am using Rcpp/arrayfire and want a line in my makevars file to detect the users R version. Currently I have it set in 4.0, but I anticipate users having different R versions.
If this question…
owalt
- 13
- 2
1
vote
0 answers
Scale the columns of an RcppArmadillo matrix using lambda function
I want to min-max the columns of a matrix using RcppArmadillo and a lambda function, without using a for loop. I have tried this in the code below but this just returns the original matrix. How to replace the original values with the scaled…
NickSc79
- 11
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