本文簡要介紹
pyspark.mllib.linalg.distributed.CoordinateMatrix.toBlockMatrix
的用法。用法:
toBlockMatrix(rowsPerBlock=1024, colsPerBlock=1024)
將此矩陣轉換為 BlockMatrix。
- rowsPerBlock:整數,可選
組成每個塊的行數。形成最終行的塊不需要具有給定的行數。
- colsPerBlock:整數,可選
組成每個塊的列數。形成最終列的塊不需要具有給定的列數。
參數:
例子:
>>> entries = sc.parallelize([MatrixEntry(0, 0, 1.2), ... MatrixEntry(6, 4, 2.1)]) >>> mat = CoordinateMatrix(entries).toBlockMatrix()
>>> # This CoordinateMatrix will have 7 effective rows, due to >>> # the highest row index being 6, and the ensuing >>> # BlockMatrix will have 7 rows as well. >>> print(mat.numRows()) 7
>>> # This CoordinateMatrix will have 5 columns, due to the >>> # highest column index being 4, and the ensuing >>> # BlockMatrix will have 5 columns as well. >>> print(mat.numCols()) 5
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注:本文由純淨天空篩選整理自spark.apache.org大神的英文原創作品 pyspark.mllib.linalg.distributed.CoordinateMatrix.toBlockMatrix。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。