is a library callback that gives a pointer to an MTensor with the column indices for the explicitly stored positions in s.
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技术笔记
LibraryLink`
MSparseArray_getColumnIndices (C 函数)
is a library callback that gives a pointer to an MTensor with the column indices for the explicitly stored positions in s.
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Used in C/C++ code in a library function called from the Wolfram Language.
The result will point to an empty MTensor or an MTensor of rank 2 with integer type. The first dimension is the number of explicit positions, and the second dimension is equal to the rank of s minus 1.