
Interpolation Excel Add In
A free collection of functions which extends the capabilities of Microsoft Excel; developed primarily to facilitate interpolation of 3-dimensional and 2-dimensional. Rue des cascades lyrics.
I have the following excel setup that is extremely massive but here is a simplified setup: Site1 X-Given Y-Given Site2 X-New-Given Y-Interpolated A 10 400 A 25 550 A 20 500 A 25 550 A 30 600 A 26 560 A 40 700 B 27 570 A 50 800 B 30 600 B 10 400 B 15 450 B 20 500 B 25 550 B 30 600 B 30 600 What I'm trying to accomplish is to have each Y-Interpolated only interpolate based upon its specific site and not have any cross over. So site A would only interpolate with site A, and same with site B. So on and so forth. I'm using the interpolate excel addin which has the following syntax: =interpolate(x_array,y_array,x_given) Thanks for the help! To @Gimp's point, if this is from a custom add-in that someone built (i.e- not a standard Excel Add-In), you should be able to find the VBA code behind the UDF (user-defined function) interpolate.
I didn't see this formula inside of any Excel standard add-ins, so chances are it's a custom one. To find the code, click Alt + F11 to open the VBE. Do a search for interpolate and see if you find something that says Function interpolate(.) If so, post the code for that function and we can then adjust it to help you get what you want. – Aug 15 '12 at 17:40.
Excel doesn’t have a built in function dedicated to linear interpolation. It’s still possible to do it, but it can be cumbersome. Normally, I would just complain and use the tools provided to muddle through, but I came upon a situation where writing a custom function was less work than creating the convoluted monster of standard excel functions required to do what I wanted to do, 2D linear interpolation. Introducing LInterpolate Download Syntax and usage for my LInterpolate function follow. Description Returns the linear interpolation for the given new x.
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Finds the nearest neighbors in an array of known x’s and returns the corresponding y interpolated from an array of known y’s. If the optional new y is also passed, returns the interpolated result from a 2D table of values defined by the intersection of the known x’s columns and known y’s rows. Syntax LInterpolate (x_range, y_range, new_x, [new_y ]) LInterpolate syntax has the following arguments: • x_range required. The range of known x’s in your data used for interpolation.x_range must be a range of two or more values in ascending order for interpolation to work. For predictable results, x_range should be a single contiguous range of values. • y_range required.
The range of known y’s in your data used for interpolation.y_range must be a range of two or more values. If new_y is used, y_range must be in ascending order for interpolation to work. For 2D interpolation, y_range must be perpendicular to x_range. This means that if one is a single row, the other must be a single column. For predictable results, y_range should be a single contiguous range of values. • new_x required. The new x used to interpolate the new y.new_x must be a single value or cell • new_y optional.