How much data does an array take?
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My question is pretty much entirely in the title. I am curious about how matlab stores data and specifically how much data an nxn array takes to store. Is each element of the array an individual 8 byte double so the size is 8*n^2 bytes?
James Tursa on 4 Nov 2023
Edited: James Tursa on 4 Nov 2023
The data is held in contiguous memory, so yes for a full real double an NxN matrix would take 8*N^2 bytes for the data. Then there is a variable header that contains info such as class, dimensions, data pointers, etc. That takes an additional 132(?) bytes or so per variable. The actual header amount can vary from release to release, and I haven't checked lately what it is currently.