WebDataFrame是一种以RDD为基础的分布式数据集，类似于传统数据库中的二维表格。 带有schema元信息，即DataFrame所表示的二维表数据集的每一列都带有名称和类型。 这样的数据集可以用SQL查询。 创建方式 准备数据 1 zhangsan 20 male 2 lisi 30 female 3 wangwu 35 male 4 zhaosi 40 female toDF方式 WebTo transform the distribution in the generated RDD from standard normal to some other normal N (mean, sigma^2), use RandomRDDs.normal (sc, n, p, seed).map (lambda v: mean + sigma * v) New in version 1.1.0. Parameters sc pyspark.SparkContext used to create the RDD. sizeint Size of the RDD. numPartitionsint, optional

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What is RDD? Comprehensive Guide to RDD with Advantages

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