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.
Usage
create_triplet(
m,
retain_zero_structure = FALSE,
i_col = "i",
j_col = "j",
value_col = "value"
)
Arguments
- m
A matrix or Matrix to be converted to triplet form.
- retain_zero_structure
A boolean that tells whether
to retain the structure of zero matrices.
Default is FALSE.
- i_col, j_col, value_col
String names of i, j, and x columns.
Value
A tibble triplet representation of m.
Details
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.