numpy.tril(a, k=0) : Returns copy of array with lower part of the triangle w.r.t k
a : input array k : [int, optional, 0 by default] Diagonal we require; k>0 means diagonal above main diagonal or vice versa.
Lower triangle of a, having same shape and data-type as a.
Main Diagonal elements : [[ 1 0 0] [ 63 434 0] [ 54 54 56]] Diagonal above main Diagonal elements : [[ 1 21 0] [ 63 434 3] [ 54 54 56]] Main Diagonal elements : [[ 0 0 0] [63 0 0] [54 54 0]]
These NumPy-Python programs won’t run on onlineID, so run them on your systems to explore them
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