datatable.FExpr.__lt__()¶
Compare whether x < y.
Like all other FExpr operators, the less-than operator is elementwise:
it produces a column where each element is the result of comparison
x[i] < y[i].
If x or y are multi-column expressions, then they must have the
same number of columns, and the < operator will be applied to each
corresponding pair of columns. If either x or y are single-column
while the other is multi-column, then the single-column expression
will be repeated to the same number of columns as its opponent.
The less-than operator can be applied to columns of any type, and the
types of x and y are allowed to be different. In the latter
case the columns will be converted into a common stype before the
comparison.
Parameters¶
FExprThe arguments must be either FExprs, or expressions that can be
converted into FExprs.
FExprAn expression that evaluates x < y. The produced column will
have stype bool8.