Comments (1)
mbostock
commented on May 5, 2024
Sorry, but I don’t understand what you are asking. The contours method expects an n×m array as input; you’re not supposed to pass it an empty array. If you do, it is equivalent to the values in the grid being undefined (or equivalently NaN), and all NaN values are considered to not pass the threshold test. Which seems to work fine:
https://beta.observablehq.com/@mbostock/empty-contour-test
from d3-contour.
Related Issues (20)
- Release d3-array v2 compatible version? HOT 2
- hole issue in contour HOT 5
- Arrows using elevation value for any point(x, y) in contour chart HOT 5
- GeoJSON Geometry which is generated by d3.contour displays wrong HOT 3
- output data has index which is not exist in input data HOT 2
- Feature request: contour labels HOT 2
- smoothing removes line segements HOT 1
- Buggy input check in density size setter.
- Improve slow computations for large images HOT 2
- Handle Null values in grid HOT 9
- Dependencies HOT 3
- Some contour polygon is reverse. HOT 5
- Support fractional bandwidths. HOT 2
- [feature]: cellSize(0.5) would work well in d3.contourDensity() HOT 1
- Support curvilinear grids HOT 11
- Sometimes the lowest threshold is missing
- Bug HOT 2
- Breaking change with contour-density thresholds starting from v3.0.2 HOT 2
- isobands?
- Don’t round the corners HOT 8
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from d3-contour.