curve fitting

<tbody> Dependent (f) Independent 1 (x) Independent 2 (y) 54 16 2 21 14 46 89 95 9 53 26 64 56 50 22 44 23 35 12 45 41 48 69 5 74 84 49 </tbody> Hello, I a looking for a way to create a curve based on multiple independent variables. The result...

Hi Guys, By referring to the older post, I found something below as Cubic Spline Interpolation. The formula I found was s(x) = a(x-xi)^3+ b(x-xi)^2 + c(x-xi) + d, I would like to understand how it translate to the algorithm below. Much Appreciate. Function spline(periodcol As Range, ratecol...

I am trying to determine the equation that best approximates the values in this table for converting raw scores in bridge to IMPs. <tbody> Up To IMPs Up To IMPs Up To IMPs 10 0 420 9 1740 17 40 1 490 10 1990 18 80 2 590 11 2240 19 120 3 740 12 2490 20 160 4 890 13 2990...

I am very bad with excel and am just learning to use it. Can anyone help me figure out how to create a sigmoidal curve with these values? X-Values Y-Values (Triplicates) <!--StartFragment--><colgroup><col width="89" style="width:64pt"><col span="3" width="81"...