3.121 FAQ-695 What is the difference between Integrate, integratexy and Integ1?

difference-between-Integrate-and-Integ1

Last Update: 4/28/2015

You may notice that Origin has three integrate functions, integrate, integratexy and integ1.

	integratexy	integ1.	integrate
Brief Description	Takes a pair of X and Y data and calculates the cumulative values of integrated area under the curve. Missing values will be ignored.	Takes a pair of X and Y data and calculates the mathematical area or absolute area under the curve.	Takes a set of Y data and calculates the cumulative values of integrated area under the curve. Row numbers other than the associated X are used as X values of the curve. Missing values will be ignored.
Options it provides	Calculate the mathematical area	Calculate the mathematical area or absolute area Can create a baseline by straightly connecting end points. Multiple other values can output to the Result Log, including the values/indece of the beginning and ending X, maximum height and the corresponding X, and HWFH.	Calculate the mathematical areas
Script example	newbook; col(a)={2:2:100}; col(b)= nlf_gauss(col(a),-20,50,20,2000); col(c)= IntegrateXY(col(a), col(b));	newbook; col(a)={2:2:100}; col(b)= nlf_gauss(col(a),-20,50,20,2000); integ1 iy:=col(b) type:=abs;	newbook; col(a)={2:2:100}; col(b)= nlf_gauss(col(a),-20,50,20,2000); col(c)=Integrate(col(b));