(50g) Store calculation result in different directory

[Tugdual]

You seem to be confused the same way I was, and may be I still am.
Directories are not the same as for PCs. So for example if you have one variable in the ROOT and then CHDIR on another directory, the root variable is still visible, you can call it without any sort of path. This being said nothing prevents you from creating the same variable in the subdirectory and this one will be used instead of the ROOT one.
For that reason I don't think there anything like a path in the 50g.