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ROSARIO randomization of an assemblage matrix

rosario_sample.Rd

Randomly permutes each row by a uniform cyclic shift of its columns and, with probability 0.5, reverses the order (mirror image). This kind of permutations preserves each biological identity's temporal autocorrelation structure and niche breadth while randomizing location within the cycle.

Usage

rosario_sample(mat)

Arguments

mat

Numeric matrix with biological identities in rows and ordered time intervals in columns.

Value

A numeric matrix of the same dimension as mat, randomized row-wise.

See also

rosario(), vec_permutation()

Examples

rosario_sample(ex1)
#>      INT1 INT2 INT3 INT4 INT5 INT6 INT7 INT8 INT9 INT10 INT11 INT12
#> [1,]    0    0    0    0    0    0    0    0    0    13    75    12
#> [2,]    0    0    0    0    0    0    0   15   78     7     0     0
#> [3,]    0    9   79   12    0    0    0    0    0     0     0     0
#> [4,]    0    0    0    0   10   80   10    0    0     0     0     0
#> [5,]    0    0    7   81   12    0    0    0    0     0     0     0