cannot open the connection

[sjanssen2]

Hi,
I am trying to run your wonderful tool on ~90 features, 1200 samples. After a while, I get the following error:

Error in file(file, ifelse(append, "a", "w")) : 
  cannot open the connection
Calls: metalondaAll ... write.csv -> eval.parent -> eval -> eval -> write.table -> file

Unfortunately, I don't know how to make R print line numbers or a more elaborate stack trace. I suspect the number of open file handles is exceeded. Do you know how to raise this number?

[sjanssen2]

Limit seems to be set to 128 - 3 available connections: HenrikBengtsson/Wishlist-for-R#28

[sjanssen2]

I spiked cat(nrow(showConnections())) into the metalonda function, which always shows 0 - so it looks like all connections are properly closed each time.

[aametwally]

Hi Stefan,

The rationale behind having the double prefix in saving figures statements is because I thought it would be easier for users to save all generated figures in one directory. Given that MetaLonDA generates ~5 files for each tested features, it'd be a bit distracting if all of these figures are saved in the current directory. Coming from the C/C++ as well, I think your suggestion is great though. In the next version, I'll add one parameter for specifying the output path and another parameter for the prefix.