I need to set an environment variable from a Mathematica notebook.
Environment["VARIABLE"]
gives the value of the variable. But is it possible to set a variable, too?
+2
A:
I am assuming you are going to do this before you try to run an external command right? Why not instead just run "VARNAME=value; your_original_external_command" that will temporarily set the evn variable.
Yogi
2009-05-13 22:48:17
+3
A:
There's no built in function (to my knowledge), but you can just use
Run["set VAR=VALUE"]
or
!set VAR=VALUE
instead.
Edit: You'll want to see the documentation for the Run and RunThrough commands.
Iceman
2009-05-13 23:03:07
"set" does not seem to work, but "export" does (I'm using bash on Mac OS X).:~ cls$ export VAR=VALUE:~ cls$ echo $VARVALUEHowever, it does not work from Mathematica.In[15]:= Run["export VAR=VALUE"]Out[15]= 0In[16]:= Environment["VAR"]Out[16]= $FailedEven if I set the variable from the command line, it cannot be retrieved with Environment[].
D-Bug
2009-05-15 13:52:52