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Use stable sort. #105

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Merged
delucchi-cmu merged 1 commit into from
Jun 20, 2023
Merged

Use stable sort. #105

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4 changes: 2 additions & 2 deletions src/hipscat/pixel_math/hipscat_id.py
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ def compute_hipscat_id(ra_values, dec_values):
## We sort to put pixels next to each other that will need to be counted.
## This simplifies the counter logic, as we can subtract the index where
## we first see the pixel value from the current index to get the offset counter.
sort_index = np.argsort(mapped_pixels)
sort_index = np.argsort(mapped_pixels, kind="stable")
mapped_pixels = mapped_pixels[sort_index]

## Construct the counter.
Expand All @@ -62,7 +62,7 @@ def compute_hipscat_id(ra_values, dec_values):
)
shifted_pixels = shifted_pixels + offset_counter

unsort_index = np.argsort(sort_index)
unsort_index = np.argsort(sort_index, kind="stable")
return shifted_pixels[unsort_index]


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