在 R 编程中获取矩阵行列式的模 - 行列式 ()函数
R 语言中的determinant()
函数是一个通用函数,它分别返回行列式的模数(可选地在对数刻度上)和行列式的符号。
Syntax: determinant(x, logarithm = TRUE, …)
Parameters:
x: matrix
logarithm: if TRUE (default) return the logarithm of the modulus of the determinant
示例 1:
# R program to illustrate
# determinant function
# Initializing a matrix with
# 3 rows and 3 columns
x <- matrix(c(3, 2, 6, -1, 7, 3, 2, 6, -1), 3, 3)
# Getting the matrix representation
x
# Calling the determinant() function
determinant(x)
输出:
[, 1] [, 2] [, 3]
[1, ] 3 -1 2
[2, ] 2 7 6
[3, ] 6 3 -1
$modulus
[1] 5.220356
attr(, "logarithm")
[1] TRUE
$sign
[1] -1
attr(, "class")
[1] "det"
示例 2:
# R program to illustrate
# determinant function
# Initializing a matrix with
# 2 rows and 2 columns
x <- matrix(c(1, 2, 3, 4), 2, 2)
# Getting the matrix representation
x
# Calling the determinant() function
determinant(x, logarithm = FALSE)
输出:
[, 1] [, 2]
[1, ] 1 3
[2, ] 2 4
$modulus
[1] 2
attr(, "logarithm")
[1] FALSE
$sign
[1] -1
attr(, "class")
[1] "det"