| Package | Description |
|---|---|
| org.datavec.api.transform.reduce |
| Modifier and Type | Method and Description |
|---|---|
Reducer.Builder |
Reducer.Builder.appendColumns(String... columns)
Reduce the specified columns by taking the concatenation of all content
Beware, the output will be huge!
|
Reducer.Builder |
Reducer.Builder.conditionalReduction(String column,
List<String> outputNames,
List<ReduceOp> reductions,
Condition condition)
Conditional reduction: apply the reduces on a specified column, where the reduction occurs *only* on those
examples where the condition returns true.
|
Reducer.Builder |
Reducer.Builder.conditionalReduction(String column,
String outputName,
ReduceOp reduction,
Condition condition)
Conditional reduction: apply the reduces on a specified column, where the reduction occurs *only* on those
examples where the condition returns true.
|
Reducer.Builder |
Reducer.Builder.countColumns(String... columns)
Reduce the specified columns by counting the number of values
|
Reducer.Builder |
Reducer.Builder.countUniqueColumns(String... columns)
Reduce the specified columns by counting the number of unique values
|
Reducer.Builder |
Reducer.Builder.customReduction(String column,
AggregableColumnReduction columnReduction)
Reduce the specified column using a custom column reduction functionality.
|
Reducer.Builder |
Reducer.Builder.keyColumns(String... keyColumns)
Specify the key columns.
|
Reducer.Builder |
Reducer.Builder.maxColumn(String... columns)
Reduce the specified columns by taking the maximum value
|
Reducer.Builder |
Reducer.Builder.meanColumns(String... columns)
Reduce the specified columns by taking the mean of the values
|
Reducer.Builder |
Reducer.Builder.minColumns(String... columns)
Reduce the specified columns by taking the minimum value
|
Reducer.Builder |
Reducer.Builder.multipleOpColmumns(List<ReduceOp> ops,
String... columns) |
Reducer.Builder |
Reducer.Builder.populationVariance(String... columns)
Reduce the specified columns by taking the population variance of the values
|
Reducer.Builder |
Reducer.Builder.prependColumns(String... columns)
Reduce the specified columns by taking the concatenation of all content in the reverse order
Beware, the output will be huge!
|
Reducer.Builder |
Reducer.Builder.prodColumns(String... columns)
Reduce the specified columns by taking the product of values
|
Reducer.Builder |
Reducer.Builder.rangeColumns(String... columns)
Reduce the specified columns by taking the range (max-min) of the values
|
Reducer.Builder |
Reducer.Builder.setIgnoreInvalid(String... columns)
When doing the reduction: set the specified columns to ignore any invalid values.
|
Reducer.Builder |
Reducer.Builder.stdevColumns(String... columns)
Reduce the specified columns by taking the standard deviation of the values
|
Reducer.Builder |
Reducer.Builder.sumColumns(String... columns)
Reduce the specified columns by taking the sum of values
|
Reducer.Builder |
Reducer.Builder.takeFirstColumns(String... columns)
Reduce the specified columns by taking the first value
|
Reducer.Builder |
Reducer.Builder.takeLastColumns(String... columns)
Reduce the specified columns by taking the last value
|
Reducer.Builder |
Reducer.Builder.uncorrectedStdevColumns(String... columns)
Reduce the specified columns by taking the uncorrected standard deviation of the values
|
Reducer.Builder |
Reducer.Builder.variance(String... columns)
Reduce the specified columns by taking the variance of the values
|
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