Matrix representation does not pass accuracy order

maroba / findiff

Python package for numerical derivatives and partial differential equations in any number of dimensions.

MIT License

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Closed maroba closed 3 years ago

maroba commented 3 years ago

d = FinDiff(0, 1, 2)
d2 = FinDiff(0, 1, 2, acc=4)
d-d2

results in zero matrix.