stackoverflow: reflect_triangle – R documentation

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reflect_triangle

Reflect upper/lower triangle across diagonal

Create a new matrix by copying the lower(upper) triangle to the other half.

reflect_triangle(m, from = c("lower", "upper"))

`m`	a square matrix
`from`	lower or upper triangle

a symmetric square matrix

x <- matrix(1:9,3,3)
  reflect_triangle(x, "lower")
  reflect_triangle(x, "upper")

Stack Overflow's Greatest Hits

v0.7.0

CC BY-SA 4.0

Authors

Neal Fultz <nfultz@gmail.com> and the StackOverflow.com community

Initial release

2020-01-03