Contribution lab / Scientific data
Empty does not
mean shapeless.
A filter can return no values and still have a meaningful shape. Change the axes of this cube to see what the netCDF4 correction preserves.
30-second example / Pause anywhere to explore
01 / Start with three axes
105 values occupy a 3 × 5 × 7 source array. Orbit the cube or separate its X layers to see all three dimensions.
Try a selection
data[:, :, :]Expected output shape
(3, 5, 7)All three axes survive. Each selected X position combines with every selected Y and Z position.
X: 3 · Y: 5 · Z: 7
Cube positions follow the (3, 5, 7) example. Read the selected result’s dimensions in the shape above.
The failure this addresses
Zero values.
Still 100 columns.
The reported two-dimensional case starts with a (24, 100) variable. Selecting zero rows returned (0, 1); the proposed correction retains (0, 100).
- Before / reported baseline
- (0, 1)
- Proposed correction
- (0, 100)
An empty axis is retained with length zero. An integer index removes its axis. These are different operations, even when both lead to an empty output.
Inspect the implementation and regression tests ↗