Unit5 Numerical Integration 2140706 Numerical Statistical Methods Humanities
- Slides: 54
Unit-5 Numerical Integration 2140706 – Numerical & Statistical Methods Humanities & Science Department Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology
What is Integration ? Ø Integral Sign Integrand Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 2
Graphical representation of Integral Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 3
Integration Ø Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 4
Why Numerical Integration ? Ø Solve it, if you can Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 5
Numerical Integration Consider the observation table Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 6
Methods of Numerical integration 1. Trapezoidal Rule 2. Simpson’s 1/3 Rule 3. Simpson’s 3/8 Rule 4. Weddle’s Rule Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 7
Trapezoidal Rule “Trapezoid” approximation with one subinterval One interval trapezoidal rule Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 8
Trapezoidal Rule “Trapezoid” approximation with two subinterval Two interval trapezoidal rule Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 9
Trapezoidal Rule “Trapezoid” approximation with three subinterval Three interval trapezoidal rule Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 10
Derive Trapezoidal rule.
Trapezoidal Rule Ø Consider the observation table Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 13
Example Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 14
1. 3499 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 15
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 16
Example Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 17
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 18
Example Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 19
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 20
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 21
Simpson’s 1/3 Rule Trapezoidal rule fit two points , Here Parabola is fitted through three points Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 22
Simpson’s 1/3 Rule Parabola 0 Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 23
Simpson’s 1/3 Rule Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 24
Simpson’s 1/3 Rule ü The no. of ordinates ( y values ) is odd. ü The accuracy can be improved by increasing n(subinterval) ü Integration is approximated by second order polynomial (quadratic). Numerical & Statistical methods (2140706) Darshan Institute Of Engineering & Technology 25
Simpson’s 1/3 Rule Ø Consider the observation table Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 26
Example 1 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 27
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 28
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 29
Example Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 30
Example 5 T (time) 0 12 V (Speed) 0 3. 6 24 36 10. 08 18. 90 48 21. 6 60 72 18. 54 10. 26 84 96 108 120 4. 5 5. 4 9 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 31
Example 5 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 32
t 0 12 v 0 3. 6 Ø 24 36 48 10. 08 18. 90 60 21. 6 72 18. 54 10. 26 84 96 108 120 4. 5 5. 4 9 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 33
Example 8 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 34
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 35
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 36
Simpson’s 3/8 Rule Ø Consider the observation table Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 37
Simpson’s 3/8 Rule a b c Simpson’s 3/8 Rule d a b c Simpson’s 1/3 Rule Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 38
Error bounds in Simpson's 3/8 rule Ø Constant Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 39
Example 2 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 40
1 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 41
1 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 42
Example Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 43
Ø Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 44
Ø Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 45
Example Ø x y 4 4. 2 4. 4 4. 6 4. 8 5. 0 5. 2 1. 3863 1. 4351 1. 4816 1. 5261 1. 5686 1. 6094 1. 6487 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 46
Ø Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 47
Example Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 48
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 49
Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 50
Weddle’s rule How to remember it easily ? We remember it to make formula. Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 51
Weddle’s rule Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 52
Example -1 Ø X 25 25. 1 25. 2 25. 3 25. 4 25. 5 25. 6 F(x) 3. 205 3. 217 3. 232 3. 245 3. 256 3. 268 3. 28 Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 53
X 25 25. 1 25. 2 25. 3 25. 4 25. 5 25. 6 F(x) 3. 205 3. 217 3. 232 3. 245 3. 256 3. 268 3. 28 Ø Numerical and statistical method (2140706) Darshan Institute of engineering & Technology 54
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