Flip a 2D matrix.

Source: R/rotate3d.R

Flip a 2D matrix.

flip2D(slice, how = "horizontally")

Arguments

slice

a 2D matrix
how

character string, one of 'vertically' / 'v' or 'horizontally' / 'h'. Note that flipping *horizontally* means that the image will be mirrored along the central *vertical* axis. If `NULL` is passed, the passed value is returned unaltered.

Value

2D matrix, the flipped matrix.