spark stringindexer
跳到 StringIndexer - StringIndexer encodes a string column of labels to a column of label indices. The indices are in [0, numLabels) , ordered by label frequencies, so the most frequent label gets index 0 . If the input column is numeric, we cast it to str,Tokenizer; StopWordsRemover; n -gram; Binarizer; PCA; PolynomialExpansion; Discrete Cosine Transform (DCT); StringIndexer; IndexToString; OneHotEncoder; VectorIndexer; Interaction; Normalizer; StandardScaler; MinMaxScaler; MaxAbsScaler; Bucketizer; Elemen
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 spark stringindexer 相關參考資料
Extracting, transforming and selecting features - Spark 2.0.0 ...
跳到 StringIndexer - StringIndexer encodes a string column of labels to a column of label indices. The indices are in [0, numLabels) , ordered by label frequencies, so the most frequent label gets inde... https://spark.apache.org Extracting, transforming and selecting features - Spark 2.0.2 ...
跳到 StringIndexer - StringIndexer encodes a string column of labels to a column of label indices. The indices are in [0, numLabels) , ordered by label frequencies, so the most frequent label gets inde... https://spark.apache.org Extracting, transforming and selecting features - Spark 2.1.0 ...
Tokenizer; StopWordsRemover; n -gram; Binarizer; PCA; PolynomialExpansion; Discrete Cosine Transform (DCT); StringIndexer; IndexToString; OneHotEncoder; VectorIndexer; Interaction; Normalizer; Standar... https://spark.apache.org Extracting, transforming and selecting features - Spark 2.1.1 ...
Tokenizer; StopWordsRemover; n -gram; Binarizer; PCA; PolynomialExpansion; Discrete Cosine Transform (DCT); StringIndexer; IndexToString; OneHotEncoder; VectorIndexer; Interaction; Normalizer; Standar... https://spark.apache.org Extracting, transforming and selecting features - Spark 2.2.0 ...
Tokenizer; StopWordsRemover; n -gram; Binarizer; PCA; PolynomialExpansion; Discrete Cosine Transform (DCT); StringIndexer; IndexToString; OneHotEncoder; VectorIndexer; Interaction; Normalizer; Standar... https://spark.apache.org Extracting, transforming and selecting features - Spark 2.3.0 ...
Feature Transformers. Tokenizer; StopWordsRemover; n -gram; Binarizer; PCA; PolynomialExpansion; Discrete Cosine Transform (DCT); StringIndexer; IndexToString; OneHotEncoder (Deprecated since 2.3.0); ... https://spark.apache.org Extracting, transforming and selecting features - spark.ml - Spark 1.6.1 ...
跳到 StringIndexer - StringIndexer encodes a string column of labels to a column of label indices. The indices are in [0, numLabels) , ordered by label frequencies. So the most frequent label gets inde... https://spark.apache.org spark ML 中VectorIndexer, StringIndexer等用法- CSDN博客
VectorIndexer 主要作用：提高决策树或随机森林等ML方法的分类效果。 VectorIndexer是对数据集特征向量中的类别（离散值）特征（index categorical features categorical features ）进行编号。 它能够自动判断那些特征是离散值型的特征，并对他们进行编号，具体做法是通过设置一个maxCategories，特征向量中某 ... https://blog.csdn.net Spark入门：标签和索引的转化：StringIndexer- IndexToString ...
Spark的机器学习处理过程中，经常需要把标签数据（一般是字符串）转化成整数索引，而在计算结束又需要把整数索引还原为标签。这就涉及到几个转换器：StringIndexer、 IndexToString，OneHotEncoder，以及针对类别特征的索引VectorIndexer。 http://dblab.xmu.edu.cn StringIndexer (Spark 2.1.0 JavaDoc) - Apache Spark
A label indexer that maps a string column of labels to an ML column of label indices. If the input column is numeric, we cast it to string and index the string values. The indices are in [0, numLabels... https://spark.apache.org |