... 列秩||column rank 列主元||pivot in a column 裂变矩阵方法||fission matrix method ...
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A pivot table is a table in which the user can dynamically choose which fields are used as the row headings, the column headings, and what is shown as the data in each cell.
pivot表是这样一种数据表，用户可以动态地选择其中的哪些字段被用作行标题、列标题，以及被显示为每个单元格中的数据。
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