View source: R/named_triplet.R
create_triplet | R Documentation |
Creates a data frame triplet with columns
i_col
, j_col
, and value_col
from matrix m
.
Zero entries are not reported.
i
and j
integers are directly from m
and not referenced to any global set of i
and j
values.
create_triplet(
m,
retain_zero_structure = FALSE,
i_col = "i",
j_col = "j",
value_col = "value"
)
m |
A |
retain_zero_structure |
A boolean that tells whether
to retain the structure of zero matrices.
Default is |
i_col , j_col , value_col |
String names of i, j, and x columns. |
When m
is a zero matrix,
a zero-row data frame is returned by default
(retain_zero_structure = FALSE
).
But when retain_zero_structure
is TRUE
,
zero entries are reported for all rows and columns,
thereby preserving the structure of the matrix.
A tibble
triplet representation of m
.
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