Does adding variables to table cause Matlab to re-write the entire table in memory?

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Rueben Mendelsberg 2023-10-31

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评论： Rueben Mendelsberg 2023-10-31

If I add columns/variables to a table that already exists, is the entire table rewritten to memory like a matrix is when adding an element outside of the existing matrix size?

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Answer 1

Walter Roberson 2023-10-31

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No. Internally, tables have a cell array with one cell entry for each variable. The cell array would have to be extended, but that is a relatively inexpensive operation (the cell contents do not have to be copied, just the pointers to the entries.)

Now, adding new rows on the other hand requires rewriting each cell array member.