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optional sizehint for building matrix #199

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Mar 30, 2023
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optional sizehint for building matrix #199

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init
christofbradly Mar 30, 2023
84c331b
Update src/Hamiltonians/abstract.jl
christofbradly Mar 30, 2023
a2d537e
BSR doc
christofbradly Mar 30, 2023
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Update src/Hamiltonians/abstract.jl 
Co-authored-by: Joachim Brand <j.brand@massey.ac.nz>
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@christofbradly @joachimbrand
christofbradly and joachimbrand authored Mar 30, 2023
commit 84c331bd6d83504d18e7e3318f2a353a06209b08
6 changes: 3 additions & 3 deletions src/Hamiltonians/abstract.jl
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Expand Up @@ -155,9 +155,9 @@ configurations.
Providing the number `nnzs` of expected calculated matrix elements may improve performance.
The default estimates for `nnzs` is `dimension(ham)`.

Setting a custom `col_hint` may improve performance for cases where `num_offdiagonals` is
not a good estimate of the actual number of nonzero offdiagonal elements in each column.
Defaults to `num_offdiagonals(ham, address)`.
Setting a custom value `col_hint` for the estimated number of nonzero
off-diagonal matrix elements in each matrix column may improve performance.
The default value for `col_hint` is `num_offdiagonals(ham, address)`.

Providing an energy cutoff will skip the columns and rows with diagonal elements greater
than `cutoff`. Alternatively, an arbitrary `filter` function can be used instead. These are
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