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bisection coding write, Cheat Sheet of Mechanics

Hanyang University – SeoulMechanics

bisection coding write good reference

Typology: Cheat Sheet

2023/2024

Uploaded on 06/21/2024

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Option Explicit
Sub Bisection_Method()
Dim imax As Integer, iter As Integer
Dim xl As Single, xu As Single, xr As Single, es As Single, ea As Single
Worksheets("Bisection").Activate
xl = Range("B4")
xu = Range("B5")
es = Range("B6")
imax = Range("B7")
Range("A10:H100").ClearContents
Range("A10") = "반복횟수"
Range("B10") = "xl"
Range("C10") = "f(xl)"
Range("D10") = "xu"
Range("E10") = "f(xu)"
Range("F10") = "xr"
Range("G10") = "f(xr)"
Range("H10") = "error"
If f(xl) * f(xu) < 0 Then
Call Bisect(xl, xu, xr, es, ea, iter, imax)
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Option Explicit Sub Bisection_Method() Dim imax As Integer, iter As Integer Dim xl As Single, xu As Single, xr As Single, es As Single, ea As Single Worksheets("Bisection").Activate xl = Range("B4") xu = Range("B5") es = Range("B6") imax = Range("B7") Range("A10:H100").ClearContents Range("A10") = "반복횟수" Range("B10") = "xl" Range("C10") = "f(xl)" Range("D10") = "xu" Range("E10") = "f(xu)" Range("F10") = "xr" Range("G10") = "f(xr)" Range("H10") = "error" If f(xl) * f(xu) < 0 Then Call Bisect(xl, xu, xr, es, ea, iter, imax)

Else MsgBox "No sign change between initial guesses" End If End Sub Sub Bisect(xl, xu, xr, es, ea, iter, imax) Dim xrold As Single, test As Single iter = 0 Do xrold = xr xr = (xl + xu) / 2 iter = iter + 1 If xr <> 0 Then ea = Abs((xr - xrold) / xr) * 100 End If test = f(xl) * f(xr) If test < 0 Then

f = 9.8 * 68.1 / c * (1 - Exp(-(c / 68.1) * 10)) - 40 End Function