tech.ml.dataset.join — techascent/tech.ml.dataset 2.12

asof-gt clj macro

(asof-gt datatype asof-op lhs rhs)

asof-lt clj macro

(asof-lt datatype asof-op lhs rhs)

asof-nearest clj macro

(asof-nearest datatype lhs rhs)

datatype->group-by clj macro

(datatype->group-by datatype)

hash-join clj

(hash-join colname lhs rhs)

(hash-join colname
           lhs
           rhs
           {:keys [operation-space] :or {operation-space :int32} :as options})

Join by column. For efficiency, lhs should be smaller than rhs. colname - may be a single item or a tuple in which is destructures as: (let [[lhs-colname rhs-colname]] colname] ...) An options map can be passed in with optional arguments: :lhs-missing? Calculate the missing lhs indexes and left outer join table. :rhs-missing? Calculate the missing rhs indexes and right outer join table. :operation-space - either :int32 or :int64. Defaults to :int32. Returns {:join-table - joined-table :lhs-indexes - matched lhs indexes :rhs-indexes - matched rhs indexes ;; -- when rhs-missing? is true -- :rhs-missing - missing indexes of rhs. :rhs-outer-join - rhs outer join table. ;; -- when lhs-missing? is true -- :lhs-missing - missing indexes of lhs. :lhs-outer-join - lhs outer join table. }

hash-join-impl clj macro

(hash-join-impl datatype colname lhs rhs options)

hash-join-int32 clj

(hash-join-int32 colname lhs rhs options)

hash-join-int64 clj

(hash-join-int64 colname lhs rhs options)

inner-join clj

(inner-join colname lhs rhs)

(inner-join colname lhs rhs options)

Inner join by column. For efficiency, lhs should be smaller than rhs. colname - may be a single item or a tuple in which is destructures as: (let [[lhs-colname rhs-colname]] colname] ...) An options map can be passed in with optional arguments: :operation-space - either :int32 or :int64. Defaults to :int32. Returns the joined table

left-join clj

(left-join colname lhs rhs)

(left-join colname lhs rhs options)

Left join by column. For efficiency, lhs should be smaller than rhs. colname - may be a single item or a tuple in which is destructures as: (let [[lhs-colname rhs-colname]] colname] ...) An options map can be passed in with optional arguments: :operation-space - either :int32 or :int64. Defaults to :int32. Returns the joined table

left-join-asof clj

(left-join-asof colname lhs rhs)

(left-join-asof colname lhs rhs {:keys [asof-op] :or {asof-op :<=} :as options})

Perform a left join asof. Similar to left join except this will join on nearest value. lhs and rhs must be sorted by join-column. join columns must be either datetime columns in which the join happens in millisecond space or they must be numeric - integer or floating point datatypes.

options:

• asof-op- may be [:< :<= :nearest :>= :>] - type of join operation. Defaults to <=.

right-join clj

(right-join colname lhs rhs)

(right-join colname lhs rhs options)

Right join by column. For efficiency, lhs should be smaller than rhs. colname - may be a single item or a tuple in which is destructures as: (let [[lhs-colname rhs-colname]] colname] ...) An options map can be passed in with optional arguments: :operation-space - either :int32 or :int64. Defaults to :int32. Returns the joined table