Measures

“Point” here refers to time, frequency, or whatever is the independent “x” value.

at The value of a wave at a point, or its derivative.
average
mean 		Average or mean value.
cross Find crossings.
integrate
area 		The area under the curve.
max Maximum value, or its point.
min Minimum value, or its point.
rms The RMS value.
slewrate
slope
ddt 		Slew rate or slope.