Return a Matrix with Upper Triangle as TRUE values in R Programming – upper.tri() Function
Last Updated :
16 Jun, 2020
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:
mat < - matrix(c( 1 : 9 ), 3 , 3 , byrow = T)
upper.tri(mat, diag = F)
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Output:
[, 1] [, 2] [, 3]
[1, ] FALSE TRUE TRUE
[2, ] FALSE FALSE TRUE
[3, ] FALSE FALSE FALSE
Example 2:
mat < - matrix(c( 1 : 9 ), 3 , 3 , byrow = T)
upper.tri(mat, diag = T)
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Output:
[, 1] [, 2] [, 3]
[1, ] TRUE TRUE TRUE
[2, ] FALSE TRUE TRUE
[3, ] FALSE FALSE TRUE
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