cubical | R Documentation |
This function is an R wrapper for the CubicalRipser C++ library to calculate
persistent homology. For more information on the C++ library, see
https://github.com/CubicalRipser. For more information on how objects of
different classes are evaluated by cubical
, read the Details section
below.
cubical(dataset, ...) ## S3 method for class 'array' cubical(dataset, threshold = 9999, method = "lj", ...) ## S3 method for class 'matrix' cubical(dataset, ...)
dataset |
object on which to calculate persistent homology |
... |
other relevant parameters |
threshold |
maximum simplicial complex diameter to explore |
method |
either |
cubical.array
assumes dataset
is a lattice, with each element containing
the value of the lattice at the point represented by the indices of the
element in the array
.
cubical.matrix
is redundant for versions of R
at or after 4.0. For
previous versions of R
, in which objects with class matrix
do not
necessarily also have class array
, dataset
is converted to an array
and persistent homology is then calculated using cubical.array
.
PHom
object
# 2-dim example dataset <- rnorm(10 ^ 2) dim(dataset) <- rep(10, 2) cubical_hom2 <- cubical(dataset) # 3-dim example dataset <- rnorm(8 ^ 3) dim(dataset) <- rep(8, 3) cubical_hom3 <- cubical(dataset) # 4-dim example dataset <- rnorm(5 ^ 4) dim(dataset) <- rep(5, 4)
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