Constructor for shaq objects.
shaq(Data, nrows, ncols, checks = TRUE)# S3 method for matrix
shaq(Data, nrows, ncols, checks = TRUE)
# S3 method for numeric
shaq(Data, nrows, ncols, checks = TRUE)
The local submatrix.
The GLOBAL number of rows and columns.
Logical. Should some basic dimension checks be performed? Note that these require communication, and with many MPI ranks, could be expensive.
If checks=TRUE, a check on the global number of rows is performed.
This amounts to an allgather operation on a logical value (the local
dimension check).
If nrows and/or ncols is missing, then it will be imputed.
This means one must be especially careful to manually provide ncols
if some of ranks have "placeholder data" (a 0x0 matrix), which is typical
when reading from a subset of processors and then broadcasting out to the
remainder.