Return a Matrix with Upper Triangle as TRUE values in R Programming – upper.tri() Function
upper.tri()
function in R Language is used to return a matrix of logical values with upper triangle as TRUE.
Syntax: upper.tri(x, diag)
Parameters:
x: Matrix object
diag: Boolean value to include diagonal
Example 1:
# R program to print the # upper triangle of a matrix # Creating a matrix mat < - matrix(c( 1 : 9 ), 3 , 3 , byrow = T) # Calling upper.tri() Function # Excluding diagonal elements upper.tri(mat, diag = F) |
Output:
[, 1] [, 2] [, 3] [1, ] FALSE TRUE TRUE [2, ] FALSE FALSE TRUE [3, ] FALSE FALSE FALSE
Example 2:
# R program to print the # upper triangle of a matrix # Creating a matrix mat < - matrix(c( 1 : 9 ), 3 , 3 , byrow = T) # Calling upper.tri() Function # including diagonal elements upper.tri(mat, diag = T) |
Output:
[, 1] [, 2] [, 3] [1, ] TRUE TRUE TRUE [2, ] FALSE TRUE TRUE [3, ] FALSE FALSE TRUE