Convert a CAMUVResult to a tidy data.frame

Converts the estimated adjacency matrix into a long-format data.frame with one edge per row, like tidy.LingamResult(). Because CAM-UV is a nonlinear method, estimate is 1 for identified edges (an edge indicator, not a coefficient), and NA for variable pairs suspected to be connected through an unobserved variable (UCP/UBP); the NA rows appear in both directions. Drop them with e.g. subset(tidy(x), !is.na(estimate)) if not needed.

Usage

# S3 method for class 'CAMUVResult'
tidy(x, threshold = 0, ...)

Arguments

x

The return value of lingam_camuv() (a CAMUVResult object)

threshold

Kept for interface consistency with the other tidy() methods (default: 0); with 0/1 entries any value in [0, 1) returns all edges. NA entries are always kept.

...

Unused

Value

data.frame(from, to, estimate)

Examples

# \donttest{
if (requireNamespace("mgcv", quietly = TRUE)) {
  confounded <- generate_camuv_sample(n = 200, seed = 1)
  model <- lingam_camuv(confounded$data)
  tidy(model)
}
#>   from to estimate
#> 1   x0 x1        1
#> 2   x0 x3        1
#> 3   x2 x4        1
#> 4   x2 x5       NA
#> 5   x3 x4       NA
#> 6   x4 x3       NA
#> 7   x5 x2       NA
# }