Excel's Formula - sisman

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668 Part VI: Developing Custom Worksheet Functions Consider the following Function procedure. This function accepts a range argument and returns the number of formula cells in the range: Function FORMULACOUNT(rng) cnt = 0 For Each cell In rng If cell.Has<strong>Formula</strong> Then cnt = cnt + 1 Next cell FORMULACOUNT = cnt End Function In many cases, the preceding function works just fine. But what if the user enters a formula like this one? =FORMULACOUNT(A:C) The three-column argument consists of 3,145,728 cells. With an argument that consists of one or more entire columns, the function does not work well because it loops through every cell in the range, even those that are well beyond the area of the sheet that’s actually used. The following function is rewritten to make it more efficient: Function FORMULACOUNT(rng) cnt = 0 Set WorkRange = Intersect(rng, rng.Parent.UsedRange) If WorkRange Is Nothing Then FORMULACOUNT = 0 Exit Function End If For Each cell In WorkRange If cell.Has<strong>Formula</strong> Then cnt = cnt + 1 Next cell FORMULACOUNT = cnt End Function This function creates a Range object variable named WorkRange that consists of the intersection of the range passed as an argument and the used range of the worksheet. In other words, WorkRange consists of a subset of the range argument that only includes cells in the used range of the worksheet. Note the If-Then construct that checks if the WorkRange is Nothing. That will be the case if the argument for the function is outside of the used range. In such a case, the function returns 0, and execution ends.
VBA Custom Function Examples In This Chapter ● Simple custom function examples ● A custom function to determine a cell’s data type ● A custom function to make a single worksheet function act like multiple functions ● A custom function for generating random numbers and selecting cells at random ● Custom functions for calculating sales commissions ● Custom functions for manipulating text ● Custom functions for counting and summing cells ● Custom functions that deal with dates ● A custom function example for returning the last nonempty cell in a column or row ● Custom functions that work with multiple worksheets ● Advanced custom function techniques 669 25 This chapter is jam-packed with a wide variety of useful (or potentially useful) VBA custom worksheet functions. You can use many of the functions as they are written. You may need to modify other functions to meet your particular needs. For maximum speed and efficiency, these Function procedures declare all variables that are used.
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Excel ® Microsoft 2010 ® Microsof
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Excel® 2010 Formulas Published by
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Publisher’s Acknowledgments We’
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vi Part VII: Appendixes Appendix A:
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viii Keyboard shortcuts . . . . . .
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x Potential Problems with Names . .
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xii Date-Related Functions . . . .
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xiv Working with Tables . . . . . .
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xvi Chapter 13: Financial Schedules
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xviii Creating Links to Cells . . .
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xx Excel’s Auditing Tools . . . .
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xxii Does the text match a pattern?
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1 INTRODUCTION Welcome to Excel 201
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VBA code listings Introduction 3 Do
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Introduction 7 You can also use thi
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Basic Information Chapter 1 Excel i
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Introducing Worksheet Functions In
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Chapter 4: Introducing Worksheet Fu
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Let Excel insert functions for you
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Manipulating Text In This Chapter
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Working with Dates and Times In Thi
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Figure 6-10: This worksheet convert
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Counting and Summing Techniques In
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Getting a quick count or sum Chapte
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Yet another way to perform this cou
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Figure 7-8: Creating a frequency di
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Figure 7-14 shows this formula at w
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The following array formula does th
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Using Lookup Functions In This Chap
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Chapter 8: Using Lookup Functions 2
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About the SUBTOTAL function Chapter
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Figure 9-17: The Advanced Filter di
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Table 10-1: Excel Rounding Function
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Round it up to the nearest penny.
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Financial Formulas Chapter 11 Borro
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Introducing Arrays In This Chapter
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Chapter 14: Introducing Arrays 369
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Figure 14-4: Creating a named array
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Performing Magic with Array Formula
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PART V Miscellaneous Formula Techni
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Introducing VBA In This Chapter ●
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Introducing the Visual Basic Editor
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Immediate window Chapter 22: Introd
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Storing VBA code In general, a modu
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768 Part VII: Appendixes Turn off
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770 Index array formulas (continued
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786 Index VBA (continued) data type
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788 Index
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5. Limited Warranty. (a) WPI warran
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