multiple outputs from a function
- To: mathgroup at smc.vnet.net
- Subject: [mg52753] multiple outputs from a function
- From: Ben Barrowes <barrowes at alum.mit.edu>
- Date: Sat, 11 Dec 2004 05:22:57 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
I feel I must be missing something fundamental... How do you write a function (or ?) in Mathematica which produces more than one output? Let's say I have some data and I want a single function to calculate the mean, variance, std, etc, more than one thing and return those? I know that there are builtin functions for those parameters, but the point is I want to define functions with more than one output. The only examples I can find are along the lines of: f[x_,y_]:=x^2+y^2; which have only a single result. Is there a different structure altogether, such as a Subroutine, which allows multiple results from a single subunit? One thought I had was that because Mathematica treats everything as global unless defined specifically local (e.g. in a module), that variables used in a procedure would be accessible and would thus be a "result", but it seems scoping problems would arise if this was used too often. For example: In[67]:= t1[x_,y_]:=(a1=x^2+y;a2=x+y^2;x+y) In[68]:= t2=t1[5,6] Out[68]= 11 In[69]:= a1 Out[69]= 31 In[70]:= a2 Out[70]= 41 Is this the accepted method for extracting multiple results from one function definition? Ben Barrowes
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