tech.ml.protocols.column
PColumncljprotocol
missingclj
(missing col)Indexes of missing values
Indexes of missing values
set-cacheclj
(set-cache col data-map)Set the cache on the column returning a new column. Cache maps are never duplicated or copied.
Set the cache on the column returning a new column. Cache maps are never duplicated or copied.
get-column-valueclj
(get-column-value col idx)Get a value fro mthe column. Error on missing values.
Get a value fro mthe column. Error on missing values.
column-nameclj
(column-name col)metadataclj
(metadata col)Return the metadata map for this column. Metadata must contain :name :type :size. Categorical columns must have :categorical? true and the inference target should have :target? true.
Return the metadata map for this column.
Metadata must contain :name :type :size. Categorical
columns must have :categorical? true and the inference target
should have :target? true.statsclj
(stats col stats-set)Return a map of stats. Stats set is a set of the desired stats in keyword form. Guaranteed support across implementations for :mean :variance :median :skew. Implementations should check their metadata before doing calculations.
Return a map of stats. Stats set is a set of the desired stats in keyword form. Guaranteed support across implementations for :mean :variance :median :skew. Implementations should check their metadata before doing calculations.
set-nameclj
(set-name col name)Return a new column.
Return a new column.
column-valuesclj
(column-values col)Return a 'thing convertible to a sequence' of values for this column. May be a java array or something else. Likely to error on missing.
Return a 'thing convertible to a sequence' of values for this column. May be a java array or something else. Likely to error on missing.
selectclj
(select col idx-seq)Return a new column with the subset of indexes
Return a new column with the subset of indexes
set-valuesclj
(set-values col idx-val-seq)Set values in the column returning a new column with same name and datatype. Values which cannot be simply coerced to the datatype are an error.
Set values in the column returning a new column with same name and datatype. Values which cannot be simply coerced to the datatype are an error.
uniqueclj
(unique col)Set of all unique values
Set of all unique values
correlationclj
(correlation col other-column correlation-type)Return the correlation coefficient Supported types are: :pearson :spearman :kendall
Return the correlation coefficient Supported types are: :pearson :spearman :kendall
new-columnclj
(new-column col datatype elem-count-or-values metadata)Return a new column of this supertype with these values
Return a new column of this supertype with these values
set-metadataclj
(set-metadata col data-map)Set the metadata on the column returning a new column.
Set the metadata on the column returning a new column.
empty-columnclj
(empty-column col datatype elem-count metadata)Return a new column of this supertype where all values are missing.
Return a new column of this supertype where all values are missing.
cacheclj
(cache col)Return the cache map for this column. Cache maps are never duplcated or copied.
Return the cache map for this column. Cache maps are never duplcated or copied.
is-missing?clj
(is-missing? col idx)Return true if this index is missing.
Return true if this index is missing.
cloneclj
(clone col)Return a clone of this column.
Return a clone of this column.
supported-statsclj
(supported-stats col)List of available stats for the column
List of available stats for the column
to-double-arrayclj
(to-double-array col error-on-missing?)Convert to a java primitive array of a given datatype. For strings, an implicit string->double mapping is expected. For booleans, true=1 false=0. Finally, any missing values should be indicated by a NaN of the expected type.
Convert to a java primitive array of a given datatype. For strings, an implicit string->double mapping is expected. For booleans, true=1 false=0. Finally, any missing values should be indicated by a NaN of the expected type.
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