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Forward Divided Difference

Forward Divided Difference. Major: All Engineering Majors Authors: Autar Kaw, Sri Harsha Garapati http://numericalmethods.eng.usf.edu Numerical Methods for STEM undergraduates. Definition. . . y. Slope at . f(x). x. Forward Divided Difference. Example. Example :

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Forward Divided Difference

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  1. Forward Divided Difference Major: All Engineering Majors Authors: Autar Kaw, Sri Harsha Garapati http://numericalmethods.eng.usf.edu Numerical Methods for STEM undergraduates http://numericalmethods.eng.usf.edu

  2. Definition . y Slope at f(x) x http://numericalmethods.eng.usf.edu

  3. Forward Divided Difference http://numericalmethods.eng.usf.edu

  4. Example Example: The velocity of a rocket is given by where given in m/s and is given in seconds. Use forward difference approximation of the first derivative of Use a step size of to calculate the acceleration at Solution: http://numericalmethods.eng.usf.edu

  5. Example (contd.) http://numericalmethods.eng.usf.edu

  6. Example (contd.) Hence The exact value of can be calculated by differentiating as http://numericalmethods.eng.usf.edu

  7. Example (contd.) The absolute relative true error is http://numericalmethods.eng.usf.edu

  8. Effect Of Step Size Value of Using forward difference method. http://numericalmethods.eng.usf.edu

  9. Effect of Step Size in Forward Divided Difference Method Initial step size=0.05 http://numericalmethods.eng.usf.edu

  10. Effect of Step Size on Approximate Error Initial step size=0.05 http://numericalmethods.eng.usf.edu

  11. Effect of Step Size on Absolute Relative Approximate Error Initial step size=0.05 http://numericalmethods.eng.usf.edu

  12. Effect of Step Size on Least Number of Significant Digits Correct Initial step size=0.05 http://numericalmethods.eng.usf.edu

  13. Effect of Step Size on True Error Initial step size=0.05 Initial step size=0.05 http://numericalmethods.eng.usf.edu

  14. Effect of Step Size on Absolute Relative True Error Initial step size=0.05 http://numericalmethods.eng.usf.edu

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