Print the lower or upper triangular part of a matrix flextable

Print the lower or upper triangular part of a matrix flextable

tri_print(mat, triangle = "lower", fill = "", as.image = TRUE,
  row.names = TRUE)

Arguments

mat	input matrix
triangle	specify upper or lower in quotes
fill	what to fill the other part of the matrix (defaults to "")
as.image	print it as a image (flextable)
row.names	display row names