element-wise not equal test. 1.0 is returned where elements are not equal. Fill is returned where either measurement is invalid.
return a dataset with each element negated. If units are specified, Units must be ratiometric units, like "5 km" or dimensionless, and not ordinal or time location units.
fill in the missing values by copying nearest data points. All data in the result will be copies of elements found in the result, but no regard is given to how far a point is shifted. This was motivated by supporting fill in median.
normalize the data so that the max is 1, where we normalize by the biggest
element-wise logical not function. non-zero is true, zero is false.