Message-ID: <1329390832402-4393619.post@n4.nabble.com>
Date: 2012-02-16T11:13:52Z
From: nymphita
Subject: built a lower triangular matrix from dataframe
In-Reply-To: <1329390108727-4393591.post@n4.nabble.com>
Problem solved.
Many many thanks for your ideas!!
(this site is very stimulant) :)
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