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Preserve dtype during interpolation #796

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merged 1 commit into from
Feb 19, 2025
Merged

Preserve dtype during interpolation #796

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5 changes: 3 additions & 2 deletions mikeio/_interpolation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -111,7 +111,8 @@ def interp2d(

else:
nt, _ = da.shape
idatitem = np.empty(shape=(nt, ni))
# use dtype of da
idatitem = np.empty(shape=(nt, ni), dtype=da.values.dtype)
for step in range(nt):
idatitem[step, :] = _interp_itemstep(
da[step].to_numpy(), elem_ids, weights
Expand Down Expand Up @@ -146,7 +147,7 @@ def interp2d(
ni = len(elem_ids)
datitem = data
nt, _ = datitem.shape
idatitem = np.empty(shape=(nt, ni))
idatitem = np.empty(shape=(nt, ni), dtype=datitem.dtype)
for step in range(nt):
idatitem[step, :] = _interp_itemstep(datitem[step], elem_ids, weights)
if shape:
Expand Down
2 changes: 2 additions & 0 deletions tests/test_dfsu.py
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Original file line number Diff line number Diff line change
Expand Up @@ -939,8 +939,10 @@ def test_dataset_interp_to_xarray():
def test_interp_like_grid():
ds = mikeio.read("tests/testdata/wind_north_sea.dfsu")
ws = ds[0]
assert ws.values.dtype == np.float32
grid = ds.geometry.get_overset_grid(dx=0.1)
ws_grid = ws.interp_like(grid)
assert ws_grid.values.dtype == np.float32
assert ws_grid.n_timesteps == ds.n_timesteps
assert isinstance(ws_grid, DataArray)
assert isinstance(ws_grid.geometry, Grid2D)
Expand Down