function of dascore.transform.differentiate source

    patch: Patch ,
    dim: str | None[str, None] ,
    order = 2,
)-> ‘PatchType’

Calculate first derivative along dimension(s) using centeral diferences.

The shape of the output patch is the same as the input patch. Derivative along edges are calculated with the same order (accuarcy) as centeral points using non-centered stencils.


Parameter Description
patch The patch to differentiate.
dim The dimension(s) along which to differentiate. If None differentiates over all dimensions.
order The order of the differentiation operator. Must be a possitive, even integar.

For order=2 (the default) numpy’s gradient function is used. When order != the optional package findiff must be installed in which case order is interpreted as accuracy (“order” means order of differention in that package).


import dascore as dc
patch = dc.get_example_patch()
# 2nd order stencil for 1st derivative along time dimension
patch_diff_1 = patch.tran.differentiate(dim='time', order=2)
# 1st derivative along all dimensions
patch_diff_2 = patch.tran.differentiate(dim=None)