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 Post subject: numerical integration on excel vba
PostPosted: Fri May 28, 2010 4:30 am 
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Joined: Fri May 28, 2010 4:04 am
Posts: 2
hi, I'm new to excel vba programming, so i was looking for a complete aplied example using de vb6 package, what I need is to define and integrate a function F(x) on a finite interval [a,b].
for example:
Image


Thank you very much!!!


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 Post subject: Re: numerical integration on excel vba
PostPosted: Fri May 28, 2010 7:24 am 
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Joined: Fri May 07, 2010 7:06 am
Posts: 853
You should use autogk.bas unit, which requires 16 other units: ap, tsort, hblas, reflections, creflections, sblas, ablasf, ablas, ortfac, blas, rotations, hsschur, evd, gammafunc, gq, gkq.

Use it as follows:
Code:
    Dim State As AutoGKState
    Dim V As Double
    Dim Rep As AutoGKReport

   
    '
    ' f(x) = 3*x^2 + x/2
    ' Exact answer is 2*pi
    '
    Call AutoGKSmooth(3, 5, State)
    Do While AutoGKIteration(State)
        State.F = 3*State.X*State.X + 0.5*State.X
    Loop
    Call AutoGKResults(State, V, Rep)

    ' Now V contains result


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 Post subject: Re: numerical integration on excel vba
PostPosted: Fri May 28, 2010 4:29 pm 
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Joined: Fri May 28, 2010 4:04 am
Posts: 2
It worked like a charm!!!

thank you.! Great project.


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 Post subject: Re: numerical integration on excel vba
PostPosted: Tue Feb 24, 2015 12:21 pm 
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Joined: Tue Feb 24, 2015 12:17 pm
Posts: 1
I'm developing an application in VB6 that should interpolate some specific points entered by the user (click with mouse) on a picture control.

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kaleem


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