medianEllipticity1ResidualsFromCat

lsst.validate.drp.util.medianEllipticity1ResidualsFromCat(cat)

Compute the median real ellipticty residuals from a catalog of measurements.

Parameters:

cat – collection with a .get method

for ‘e1’, ‘e2’ that returns radians.

Returns:

float

median real ellipticity residual