I'm calling a foreach loop, with doParallel backend, from within a script. For each core I receive the message 'package ... loaded and set parent environment', which fills the output console. I see ...

I am currently making a Shiny app which computes a correlation matrix via the function denoted f()in the example below from an input dataset. Because it takes quite some time, I would like to display ...

I am interested in estimating a Poisson fixed effects model with: where is the "age" of the observation. I am interested in the coefficients, not the other fixed effects. My first ...

I have issues with mcmapply that only occures if an Rcpp-function, testfun(), is first called outside mcmapply and then called through mcmapply. The issue only exists if: testfun() uses openMP ...

I am working with a function that starts with parallel::makeCluster() and ends with parallel::stopCluster(). Sometimes it crashes in the middle and does not stop the cluster. Demonstration code: ...

I am mastering parallel programming in R simple examples tried to implement the function given in the code, it loads the processor, but the results of calculations are not. Could you please tell me ...

I have a large object (~50GB) that I wish to break into roughly 10 non-disjoint subsets to perform analysis on concurrently. The issue is that I have had numerous bad experiences with parallelism in R ...

Here is a minimal example showing the issue: mod.r: #' @export run_sqrt <- function (x) { sqrt(x) } mwe.r box::use( ./mod[...], parallel, dp = doParallel, foreach[foreach, `%dopar%`], ) ...

All of the code included in this question is from the script called "LASSO code (Version for Antony)" in my GitHub Repo for this project. And you can run it on the file folder called "...

Is it more efficient to pass objects to parallel::parLapply and parallel::parLapplyLB as function arguments or to export them with parallel::clusterExport? I.e. parallel::parLapply(cl, 1:1000, ...

I have a simple example of foreach nested loop below. How can I improve the readability of the result res? Below is another example of nested for loop with more readable results, each element of list ...

I am getting in using foreach. Can someone please explain the reason. Error in UseMethod("filter") : no applicable method for 'filter' applied to an object of class "list" ...

Aim: I'm trying to compare each element in a list with all the other elements below it using Levenshtein distance from this package stringsim to find text that is similar. Obstacle: The problem is ...

It is difficult to debug the error code of mclapply because all values of a job are affected. I prepared a simple example. library(parallel) library(dplyr) data(iris) ## Parallel Version parFun <-...

On my (large) server (Windows with 255GB RAM) my optimparallel skript is running out of memory and then crashes with Error in serialize(data, node$con) : error writing to connection. While I would ...