Check if coordinates span too small a range to be reliably rendered. A collapsed axis (whole extent at machine-precision scale relative to the coordinate magnitude) cannot be distinguished after normalization. Individual coincident adjacent points, common near extrema of smooth curves, are normal and must not be flagged.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=wp), | intent(in), | contiguous | :: | x(:) | ||
| real(kind=wp), | intent(in), | contiguous | :: | y(:) |