Editing Multimodal distribution (section)

==Galtung's classification==

Galtung introduced a classification system (AJUS) for distributions:<ref name=Galtung1969>{{cite book |last=Galtung |first=J. |year=1969 |title=Theory and methods of social research |publisher=Universitetsforlaget |location=Oslo |isbn=0-04-300017-7 }}</ref>

*A: unimodal distribution – peak in the middle
*J: unimodal – peak at either end 
*U: bimodal – peaks at both ends
*S: bimodal or multimodal – multiple peaks

This classification has since been modified slightly:

*J: (modified) – peak on right
*L: unimodal – peak on left 
*F: no peak (flat)

Under this classification bimodal distributions are classified as type S or U.