Use floating point abs func
Use floating point abs func

maurozucchelli/dipy,JohnGriffiths/dipy,demianw/dipy,matthieudumont/dipy,Messaoud-Boudjada/dipy,jyeatman/dipy,maurozucchelli/dipy,rfdougherty/dipy,mdesco/dipy,samuelstjean/dipy,nilgoyyou/dipy,villalonreina/dipy,sinkpoint/dipy,samuelstjean/dipy,maurozucchelli/dipy,samuelstjean/dipy,FrancoisRheaultUS/dipy,oesteban/dipy,demianw/dipy,nilgoyyou/dipy,Messaoud-Boudjada/dipy,JohnGriffiths/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,beni55/dipy,oesteban/dipy,sinkpoint/dipy,StongeEtienne/dipy,jyeatman/dipy,rfdougherty/dipy,mdesco/dipy,matthieudumont/dipy,StongeEtienne/dipy,beni55/dipy