Table of a persistence landscape

Usage

# S3 method for class 'persistence_landscape'
hg_get(x, what = "landscape", ..., k = NULL, top = NULL)

Arguments

x: A persistence_landscape object from hg_landscape().
what: "landscape", the only table.
...: Additional arguments (ignored).
k: Integer or NULL. Keep only this landscape level.
top: Integer or NULL. Return only the first top rows, applied after any filter and after sort_by, so sort_by and top compose. Default NULL returns every row.

Value

A data.frame, one row per (level, grid point): k (landscape level), t (filtration value), value (landscape height).

Examples

set.seed(1)
w <- matrix(runif(36), 6, 6, dimnames = list(letters[1:6], letters[1:6]))
w <- (w + t(w)) / 2
diag(w) <- 0
pl <- hg_landscape(hg_homology(w, n_steps = 10),
                            dimension = 0)
hg_get(pl, k = 1, top = 5)
#>   k         t        value
#> 1 1 0.5838612 0.0000000000
#> 2 1 0.5846595 0.0007983042
#> 3 1 0.5854578 0.0015966085
#> 4 1 0.5862561 0.0023949127
#> 5 1 0.5870544 0.0031932170