Vba screen updating off access

14 Jan

In fact if you program the binary search in VBA inside the UDF it takes 3.3 milliseconds which is only 1.7 times slower than using MATCH. Columns(1) ' Check for case if val = last value in rng v Value = rng.

These examples included specific procedures, and the emphasis was on the results of the manipulation.

I thought it would be helpful to show some of the mechanics of programming with pivot tables.

This is reasonably efficient: 20 formulas interpolating on a table 10000 rows long takes 323 millisecs. When you look at this UDF you can see that the actual calculation only uses 2 rows of data, but to get that 2 rows it has to: This sounds suspiciously like a LOOKUP or MATCH. And since the data is sorted we can use approximate MATCH.

So lets try using Excel’s MATCH function instead: you can call MATCH from inside your VBA UDF using Application. Once we have got the row number from MATCH we can get the 2 rows we are interested in.

for the sake of simplicity): Function VINTERPOLATEA(Lookup_Value as Variant, Table_Array as Range, Col_Num as long) Dim v Arr As Variant Dim j As Long ' get values v Arr = Table_Array.Value2 ' find first value greater than lookup value For j = 1 To UBound(v Arr) If v Arr(j, 1) Lookup_Value Then Exit For End If Next j ' Interpolate VINTERPOLATEA = (v Arr(j - 1, Col_Num) _ (v Arr(j, Col_Num) - v Arr(j - 1, Col_Num)) * _ (Lookup_Value - v Arr(j - 1, 1)) / (v Arr(j, 1) - v Arr(j - 1, 1))) End Function Where the Lookup_value is the value to find in the first column of the range Table_Array and Col_Num gives the column number index of the data to be interpolated (in this example 2).I have left the data in so that you will have something to work with as you proceed with the project. The template for order and inventory management (Order-Matic) is available for download below and all of the code will be included in the article.To help with the learning process I have added videos to show the steps involved.If you want to customize Oder-Matic to your needs may I suggest that you go through the tutorials and get this working as I have created it and then customize the project?You will have better success if you first understand how the application is pieced together.