How come when I integrate data represented by y=x^2 from 1 to 5 Origin gives me area = 42. However, the real answer is 41.3333. This error becomes bigger as the definite integral grows. Please help to explain this. Thank you!
Figured it out. Origin uses trapezoid approximation. So if you want a more accurate definite integral you need more data points. For example, integrating y=x^2 from 1-4 with four data points gives 21.5 as the integration value (real value is 21). Integrating the same thing using 31 data points gives 21.005. Much closer.
Integration
Posted - 11/17/2016 : 7:08:14 PM
