tr

From lasso2 v1.2-0 by Martin Maechler

Trace of a Matrix

Calculates the trace of a matrix

Keywords: math

Usage

tr(mat)

Value

The trace of the matrix, i.e. the sum of its diagonal elements, is returned.

Examples

tr(cbind(1,1:3,4:2)) # 5

Documentation reproduced from package lasso2, version 1.2-0, License: GPL version 2 or later

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