Add support for parabar parallel backend

[mihaiconstantin]

Hi Sacha,

I am trying to add support for the parabar backend, but I need to check with you first where parallelization is currently needed in bootnet. Can I safely assume that, at commit 9df9eab, the following place are the only places where a parallel backend is required?

In R/bootnet.R:

bootnet/R/bootnet.R

Lines 612 to 613 in 9df9eab

	# Run loop:
	bootResults <- pblapply(seq_len(nBoots), function(b){

bootnet/R/bootnet.R

Lines 788 to 790 in 9df9eab

	} else {
	statTableBoots <- pblapply(seq_len(nBoots),function(b){
	# Set library:

In R/parSim.R:

bootnet/R/parSim.R

Lines 64 to 65 in 9df9eab

	# Run the loop:
	Results <- pbapply::pblapply(seq_len(totCondition), function(i){

bootnet/R/parSim.R

Lines 95 to 96 in 9df9eab

	# Run the loop:
	Results <- pblapply(seq_len(totCondition), function(i){

Best,
Mihai

[SachaEpskamp]

Hi Mihai,

The parSim function has actually been ported to the parSim package, which I use a lot for simulation studies. I should also make that imported in bootnet instead of having this old code in bootnet. Other than that, indeed only the bootnet function I think.

Best,
Sacha

[mihaiconstantin]

Ah, I see. In that case:

1. The PR with support for parabar backends need to in the context of the parSim package.
2. The bootnet::bootnet function needs to be updated to use parSim::parSim.

I'll work on (1) and also give (2) a try. Since there are no tests for bootnet, it would be handy if you could take a closer look at the changes for (2). After these are done, I think we can also finally close #82.

Thanks for the clarifications!