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 Stacking (Appending) Arrays/Ranges in Excel: Formulas versus Functions Shootout
 Using Constant Arrays and Array Expressions in Excel Formulas
 Calling XLAM/XLL/Automation UDFs from VBA: Evaluate, Run, or Reference?
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 2014 MVP Summit
 Timing the Ins and Outs of User Defined Functions: MultiCell array formulas can be slow
 Automatic or Manual Calculation?: Grouped Sheets causes Calculation Confusion.
 Excel 2007 multithreading bug with Range.SubTotal and XLL
 Extracting Digits from Text: Using Formulas and Designing a Missing Excel Function: GROUPS
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Category Archives: XLL
Stacking (Appending) Arrays/Ranges in Excel: Formulas versus Functions Shootout
This post is a follow up to my last post Using Constant Arrays and Expressions in Excel Formulas. I will explore how some of the general purpose arrayhandling functions in FastExcel SpeedTools Extras compare with formulas using native Excel functions. … Continue reading
Posted in arrays, Calculation, Lookups, Uncategorized, XLL
Tagged array constant, array expression, array function, Arrays, calculation speed, Excel Formulas, Excel functions, XLL
4 Comments
Calling XLAM/XLL/Automation UDFs from VBA: Evaluate, Run, or Reference?
I have this nagging feeling that I do not know the best way to call UDFs from VBA. So after a couple of days of research here is what I have found out so far. The Available Methods Application.ExecuteExcel4Macro This … Continue reading
Posted in Calculation, UDF, VBA, XLL
Tagged array formula, array function, calculation speed, UDF, XLL
4 Comments
Timing the Ins and Outs of User Defined Functions: MultiCell array formulas can be slow
I was looking at some multicell array formula UDFs with John and Rich and could not understand why they seemed so much slower than I expected. Each UDF (written as C++ XLLs) read data from around 200 cells using around … Continue reading
Posted in Calculation, UDF, Uncategorized, VBA, XLL
Tagged array formula, array function, calculation speed, Excel 2010 Calculation Bug, UDF, XLL
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Extracting Digits from Text: Using Formulas and Designing a Missing Excel Function: GROUPS
An Excel problem that crops up quite often is how to extract digits (09) from text. The text might be part numbers, or web addresses, or currency values or … Some cases are easy to handle with formulas: A fixed … Continue reading
Getting Used Range in an XLL UDF: Multithreading and COM
In two previous blog posts I discussed why handling wholecolumn references efficiently in VBA UDFs meant that you had to find the used range for the worksheet containing the wholecolumn reference. The posts also discussed how using a cache for … Continue reading
FastExcel V3 Released with Introductory Offer
FastExcel has been used successfully by thousands of users since it was first launched in 2001. The last version 2.4 was introduced in 2008 and since that time there have been major changes to Excel with Excel 2007, 2010 and 2013, … Continue reading
Posted in Calculation, Lookups, Memory, UDF, VBA, XLL
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Inserting a UDF and Launching the Function Wizard from VBA
In a previous post I suggested you could do this by entering the function using VBA into the selected cell using a comma as the argument to the function, for example =LISTDISTINCTS.SUM(,) , and then calling the function wizard using … Continue reading
Posted in UDF, VBA, XLL
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Finding out if a function is Volatile or Multithreaded using VBA: UDFs for UDFs
Part of my new Profiling Formulas and Functions command requires the code to determine whether a Function is a native builtin Excel function, or an XLL function, or some other kind (VBA, Automation). And I also want to know if … Continue reading
Posted in Calculation, UDF, VBA, XLL
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Finding missing items in lists: VLOOKUP vs COMPARE.LISTS performance and ease of use
Returning to the subject of finding the missmatches between 2 lists I want to compare using VLOOKUP with using SpeedTools COMPARE.LISTS. Test Data My test data consists of 2 lists of 500000 6digit numbers. Most of these numbers match, but … Continue reading
Posted in Calculation, Lookups, UDF, XLL
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