类的使用
ai.rapids.cudf.ReductionAggregation

使用 ReductionAggregation 的程序包

程序包	描述
ai.rapids.cudf

在 ai.rapids.cudf 中使用 ReductionAggregation

在 ai.rapids.cudf 中返回 ReductionAggregation 的方法

修饰符和类型	方法和描述
static ReductionAggregation	ReductionAggregation.all() 全归约。
static ReductionAggregation	ReductionAggregation.any() 任意归约。
static ReductionAggregation	ReductionAggregation.collectList()
static ReductionAggregation	ReductionAggregation.collectList(NullPolicy nullPolicy) 将值收集到列表中。
static ReductionAggregation	ReductionAggregation.collectSet() 将值收集到集合中。
static ReductionAggregation	ReductionAggregation.collectSet(NullPolicy nullPolicy, NullEquality nullEquality, NaNEquality nanEquality) 将值收集到集合中。
static ReductionAggregation	ReductionAggregation.createTDigest(int delta) tDigest 归约。
static ReductionAggregation	ReductionAggregation.histogram() 创建 HistogramAggregation，计算每个唯一行的频率。
static ReductionAggregation	ReductionAggregation.hostUDF(HostUDFWrapper wrapper) 使用主机侧用户定义函数 (UDF) 执行归约。
static ReductionAggregation	ReductionAggregation.max() 最大值聚合
static ReductionAggregation	ReductionAggregation.mean() 算术平均值归约。
static ReductionAggregation	ReductionAggregation.median() 中位数归约。
static ReductionAggregation	ReductionAggregation.mergeHistogram() 创建 MergeHistogramAggregation，用于合并多个直方图。
static ReductionAggregation	ReductionAggregation.mergeLists() 合并由多个 CollectListAggregations 产生的部分列表。
static ReductionAggregation	ReductionAggregation.mergeSets() 合并由多个 CollectSetAggregations 产生的部分集合。
static ReductionAggregation	ReductionAggregation.mergeSets(NullEquality nullEquality, NaNEquality nanEquality) 合并由多个 CollectSetAggregations 产生的部分集合。
static ReductionAggregation	ReductionAggregation.mergeTDigest(int delta) tDigest 合并归约。
static ReductionAggregation	ReductionAggregation.min() 最小值聚合
static ReductionAggregation	ReductionAggregation.nth(int offset) 获取组中第 n 个非空元素。
static ReductionAggregation	ReductionAggregation.nth(int offset, NullPolicy nullPolicy) 获取组中第 n 个元素。
static ReductionAggregation	ReductionAggregation.nunique() 唯一非空元素的数量。
static ReductionAggregation	ReductionAggregation.nunique(NullPolicy nullPolicy) 唯一元素的数量。
static ReductionAggregation	ReductionAggregation.product() 乘积聚合。
static ReductionAggregation	ReductionAggregation.quantile(double... quantiles) 聚合以计算指定的分位数。
static ReductionAggregation	ReductionAggregation.quantile(QuantileMethod method, double... quantiles) 聚合以计算各种分位数。
static ReductionAggregation	ReductionAggregation.standardDeviation() 标准差聚合，自由度校正为 1。
static ReductionAggregation	ReductionAggregation.standardDeviation(int ddof) 标准差聚合。
static ReductionAggregation	ReductionAggregation.sum() 求和聚合
static ReductionAggregation	ReductionAggregation.sumOfSquares() 平方和归约。
static ReductionAggregation	ReductionAggregation.variance() 方差聚合，自由度校正为 1。
static ReductionAggregation	ReductionAggregation.variance(int ddof) 方差聚合。

在 ai.rapids.cudf 中使用 ReductionAggregation 类型参数的方法

修饰符和类型	方法和描述
标量	ColumnView.reduce(ReductionAggregation aggregation) 计算列中所有行的值的归约。
标量	ColumnView.reduce(ReductionAggregation aggregation, DType outType) 计算列中所有行的值的归约。