Optimizing Hadoop Performance for Big Data Analytics in Smart Grid

Table 2

Mathematic functions used in GEP.

Functions	Function descriptions	Input data types
plus		Integer or float
minus		Integer or float
multiply		Integer or float
divide		Integer or float
sin		Integer or float
cos		Integer or float
tan		Integer or float
acos		Integer or float
asin		Integer or float
atan		Integer or float
exp	returns the exponential	Integer or float
log		Positive integer or float
log10	returns the (base-10) logarithm of	Positive integer or float
pow	returns base raised to the power exponent	Integer or float
sqrt		Positive integer or float
fmod	returns the floating-point remainder of (rounded towards zero)	Integer or float
pow10	returns base 10 raised to the power exponent	Integer or float
inv		Integer or float
abs	returns absolute value of parameter	integer
neg	;	Integer or float