convert signed incidence matrix to list
imSigned2list(x, empty = c(NA, "", 0, FALSE), ...)matrix or equivalent object with colnames(x) indicating
list set names, and rownames(x) indicating list contents.
character vector of incidence matrix values that
should be considered "empty" and therefore do not indicate
the row in x is present for the given column in x.
All other items are considered to be present, and are assigned
direction based upon the value in that cell of x.
additional arguments are ignored.
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).
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.
Values that are logical with TRUE and FALSE are converted
to numeric before output.
Other jam list functions:
colors_from_list(),
im2list_dep(),
im2list(),
imSigned2list_dep(),
list2concordance(),
list2imSigned(),
list2im()
im <- matrix(c(0,1,-1,1,1,NA,-1,0,1),
ncol=3,
nrow=3,
dimnames=list(letters[1:3], LETTERS[1:3]))
print(im);
#> A B C
#> a 0 1 -1
#> b 1 1 0
#> c -1 NA 1
# matrix input
im2list(im);
#> Warning: NAs introduced by coercion
#> Warning: NAs introduced by coercion
#> Warning: NAs introduced by coercion
#> $A
#> [1] "b" "c"
#>
#> $B
#> [1] "a" "b"
#>
#> $C
#> [1] "a" "c"
#>
imSigned2list(im);
#> $A
#> b c
#> 1 -1
#>
#> $B
#> a b
#> 1 1
#>
#> $C
#> a c
#> -1 1
#>
imSigned2list(im != 0);
#> $A
#> b c
#> 1 1
#>
#> $B
#> a b
#> 1 1
#>
#> $C
#> a c
#> 1 1
#>