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10.06.2008 at 05:10AM PDT, ID: 23790127 | Points: 500
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logarithmic scales, how to calculate a value with a slider bar

Asked by eneate in Visual Basic Programming, Programming Languages

Tags:

Hi

I have a slider bar which runs on a logaritmic scale. I use the value of the slider bar to caluculate the value.

The maximum value is 1000 and the minimum 100 this works fine. But I now need to work it the other way.

For example I know that the final value should be 1.0 but the value on the slider bar is 543 (or therabouts) but how do I change the formula to start at the end and work back to the beginning???Start Free Trial 
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Dim n1 As Integer, Gamma As Variant, docid As Integer, n2 As Integer, n3 As Integer, y As Variant, a As Variant, gam_val As Variant
 
n1 = 100
n2 = 10
n3 = 400
 
frmcontrast.Slider3.Min = 100
frmcontrast.Slider3.Max = 1000 
 
y = 3.321928
 
gam_val = frmcontrast.Slider3.value
 
a = frmcontrast.Slider3.Max - gam_val
 
N = a / 1000
 
Gamma = N ^ y * 1000
Gamma = Round(Gamma, 2)
 
frmcontrast.Label3.Caption = Round(Gamma / n1, 2)
frmcontrast.Slider3.text = Round(Gamma / n1, 2)
 
Keywords: logarithmic scales, how to calculate a…
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[+][-]10.06.2008 at 11:34AM PDT, ID: 22652965

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[+][-]10.06.2008 at 04:57PM PDT, ID: 22655538

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