Constants to determine how an interpolated value is extrapolated
when querying outside the bounds of available data.
        
        
See:
Members
- 
    staticconstantExtrapolationType.EXTRAPOLATE :Number
- 
    
    The value is extrapolated.
- 
    staticconstantExtrapolationType.HOLD :Number
- 
    
    The first or last value is used when outside the range of sample data.
- 
    staticconstantExtrapolationType.NONE :Number
- 
    
    No extrapolation occurs.
