Derivatives Using Forward Difference Formula Pseudocode
In this article, you will learn pseudocode to find derivatives using Newton's backward interpolation formula.
Pseudocode for finding derivative using Newton's backward interpolation formula is given below. This can be implemented in computer using programming language like C, C++, Python, Java etc.
1. Start 2. Read number of data: n 3. Read data points: For i = 0 to n-1 Read Xi and Yi,0 Next i 4. Read calculation point: xp 5. flag = 0 6. Check validity of calculation point: For i = 0 to n-1 If |xp - Xi| < 0.0001 index = i flag = 1 break from loop End If Next i 7. If calculation point is invalid then terminate the process: If flag = 0 Print "Invalid Calculation Point" Exit End If 8. Forward difference table: For i = 1 to n-1 For j = 0 to n-1-i Yj,i = Yj+1,i-1 - Yj,i-1 Next j Next i 9. h = X1 - X0 10. sum = 0, sign = -1 11. Finding sum: For i = 1 to n-1-index term = (Yindex, i)i / i sum = sum + sign*term sign = -sign Next i 12. first_derivative = sum/h 13. Print first_derivative 14. Stop