Some Questions About R

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** Things under legendu.net/outdated are outdated technologies that the author does not plan to update any more. Please look for better alternatives. **

1. rstudio server, read.table('clipboard') does not work (clipboard not due to server ...) this is a probablem of vimperator, not rstudio ...

Rcpp

1. how to perserve C++ object after C++ function terminates when using Rcpp?

2. is it possible to capture c++ output in rcpp?

3. is RNGScope thread safe?

4. because with RcppArmadillo, subview, matrix ...

5. is there a way to check whether an Rcpp compiled object is valid?

6. Rcpp Module mustStart=T?

7. how to keep an C++ object after c++ function is terminated? use pointer?

8. do.call('&', list(j1)) is not as expected, the best way to this? do.call('|', list(j1, j2))

Misc

1. sometimes values = setdiff(values, "") and values = values[values!=""] are exchangeable, but which is better? I guess the latter one is faster, check this ...

Calls

1. is it possible to pass argument by ref? even so, you'd be careful!

2. how to parse R code to extract function definitions? It seems that peperr::extract.fun can do this partially