[Jgeneral] write/read array to/from file

[Benedict G Archer]

Been playing with J for a year+ and can do some useful things, but  
thought a good way to advance would be to use J for things I do all  
the time.  Gave 40 students a chem test with 80 questions and have an  
array with the first column containing student names and the  
remaining columns for scores on each question.  The task is to  
evaluate the test questions--e.g., which did everyone get right, any  
that everyone missed, etc.  I'm trying to write the array to a file  
in a way that I can get it back easily and work with it.  In APL2 I  
could save a workspace; in Matlab or Octave I could save a file, but  
haven't been able to figure out how to write the J noun to a file and  
get it back.  'm' fread, after fwrite, seems to count the box  
characters as part of the array, and freads isn't useful, at least in  
my attempts, either.  Do I need to use a mapped file?  I expect to be  
red-faced when someone tells me where the answer is in the help docs  
or the lab that shows how, but it's time for me to admit I need  
help.  Suggestions on a best J approach to this simple task also  
welcome.

Thanks in advance,
Ben Archer

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Benedict G. Archer
[EMAIL PROTECTED]



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