Q: Union and precision.
- To: mathgroup at smc.vnet.net
- Subject: [mg8529] Q: Union and precision.
- From: Gadi Oron <oron at manet.pmmh.espci.fr>
- Date: Thu, 4 Sep 1997 02:20:33 -0400
- Organization: Acces regional Ile-de-France (Univ. Paris VI/VII) - France
- Sender: owner-wri-mathgroup at wolfram.com
Hello again,
How can I force Union to consider numbers equal in the current
precision as equal? Explanation:
In:= a=SetPrecision[1.234567,2]
Out:= 1.2
In:= b=SetPrecision[1.234561,2] (* Notice difference *)
Out:= 1.2
In:= a==b
Out:= True
In:= Union[{a,b}]
Out:= {1.2,1.2} (* !!! *)
How does Union evaluates equalities? How can I force it to do it the right
way??
Thanx.
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