convert signed incidence matrix to list
Value
list of named numeric vectors, where list names
are defined by colnames(x), and vector names are derived
from rownames(x). Values in each vector indicate the
signed direction, c(-1,1).
Details
This function converts an signed incidence matrix
that contains positive and negative values, or equivalent
data.frame, to a list of named vectors containing values
c(-1, 1) to indicate signed direction.
The input matrix should contain numeric values where
positive and negative values indicate directionality.
When the input contains only logical values c(TRUE,FALSE)
the direction is assumed to be +1 positive.
Values of NA are converted to zero 0 and therefore ignored.
This function uses the transactions class from the arules
R package, which in our testing is substantially faster than
similar techniques from a variety of other R packages.
See also
Other jam list functions:
colors_from_list(),
im2list(),
im2list_dep(),
imSigned2list(),
list2concordance(),
list2im(),
list2imSigned()