| fm.agg | R Documentation |
This function accepts a basic operator and perform aggregation on the FlashR object with the basic operator.
fm.agg(fm, op) fm.agg.lazy(fm, op) fm.agg.mat(fm, margin, op) fm.agg.mat.lazy(fm, margin, op)
fm |
a FlashR object |
op |
the reference or the name of a predefined basic operator or
the reference to an aggregation operator returned by
|
margin |
the subscript which the function will be applied over. |
fm.agg aggregates over the entire object.
fm.agg.lazy aggregates over the entire object, but it performs
aggregation lazily.
fm.agg.mat aggregates on the rows or columns of a matrix. It performs
aggregation on the shorter dimension lazily, but on the longer dimension
immediately.
fm.agg.mat.lazy aggregates on the rows or columns of a matrix and
performs aggregation lazily regardless the dimension.
fm.agg returns a scalar, fm.agg.mat returns
a FlashR vector, fm.agg.lazy and fm.agg.mat.lazy
return a FlashR sink matrix.
mat <- fm.runif.matrix(100, 2) res <- fm.agg(mat, "+") res <- fm.agg(mat, fm.bo.add) sum <- fm.create.agg.op(fm.bo.add, fm.bo.add, "sum") res <- fm.agg(mat, sum) res <- fm.agg.mat(mat, 1, sum)