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tp4390813p4391162
2012 Feb 15
3
built a lower triangular matrix from dataframe
Hello!
I'm trying to build a lower triangular matrix (with zeros in the diagonal)
from a particular dataframe.
The matrix I have to construct has 203 rows and 203 columns and that makes
20503 values to be included within (that's why I can't do it manually).
To illustrate the dataframe I have, I'll give you an example of a dataframe
and matrix with dimensions 6x6 (to make it