Export Regional SEDs • sagui

Measure regional SEDs from the calibrated flux cube, using the segmentation map to group pixels.

Extract

regional <- extract_region_sed(
  cube = science_cube,
  labels = seg$cluster_map,
  var_cube = science_variance,
  band_values = bands
)

flux_long contains one row per region and band. flux_wide provides one row per region for tools that expect tabular SEDs. flux_err, when a variance cube is supplied, follows the propagated regional variance.

Write tables

write.csv(regional$flux_long, "regional_seds_long.csv", row.names = FALSE)
write.csv(regional$flux_wide, "regional_seds_wide.csv", row.names = FALSE)

Save the band axis, PSF target, support mask, and segmentation parameters with the tables.

Keep labels intact

Do not renumber labels between the map and the table unless the mapping is also saved. The label numbers only identify regions.