affinePart(M,L)
affinePart(M,n)
Given an n\times m matrix M, with n<m, and a subset L\subseteq\{0,\dots,m-1\}\ of size n, this function replaces the columns with index L by an identity matrix.
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The object affinePart is a method function.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/FiniteFittingIdeals.m2:509:0.