Excel's Formula - sisman

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404 Part IV: Array <strong>Formula</strong>s Returning the last value in a column Suppose that you have a worksheet that you update frequently by adding new data to columns. You may need a way to reference the last value in column A (the value most recently entered). If column A contains no empty cells, the solution is relatively simple and doesn’t require an array formula: =OFFSET(A1,COUNTA(A:A)–1,0) This formula uses the COUNTA function to count the number of nonempty cells in column A. This value (minus 1) is used as the second argument for the OFFSET function. For example, if the last value is in row 100, COUNTA returns 100. The OFFSET function returns the value in the cell 99 rows down from cell A1 in the same column. If column A has one or more empty cells interspersed, which is frequently the case, the preceding formula won’t work because the COUNTA function doesn’t count the empty cells. The following array formula returns the contents of the last nonempty cell in column A: {=INDEX(A:A,MAX(ROW(A:A)*(A:A””)))} You can, of course, modify the formula to work with a column other than column A. To use a different column, change the column references from A to whatever column you need. You can’t use this formula, as written, in the same column in which it’s working. Attempting to do so generates a circular reference. You can, however, modify it. For example, to use the function in cell A1, change the references so that they begin with row 2 rather than the entire columns. For example, use A2:A1000 to return the last non-empty cell in the range A2:A1000. Returning the last value in a row The following array formula is similar to the previous formula, but it returns the last nonempty cell in a row (in this case, row 1): {=INDEX(1:1,MAX(COLUMN(1:1)*(1:1””)))} To use this formula for a different row, change the 1:1 reference to correspond to the row. Ranking data with an array formula Often, computing the rank orders for the values in a range of data is helpful. If you have a worksheet containing the annual sales figures for 20 salespeople, for example, you may want to know how each person ranks, from highest to lowest.
Chapter 15: Performing Magic with Array <strong>Formula</strong>s 405 If you’ve used the Excel program’s RANK function, you may have noticed that the ranks produced by this function don’t handle ties the way that you may like. For example, if two values are tied for third place, the RANK function gives both of them a rank of 3. You may prefer a commonly used approach that assigns each an average (or midpoint) of the ranks — in other words, a rank of 3.5 for both values tied for third place. Figure 15-8 shows a worksheet that uses two methods to rank a column of values (named Sales). The first method (column C) uses the Excel RANK function. Column D uses array formulas to compute the ranks. The following is the array formula in cell D4: {=SUM(1*(B4
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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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Let Excel insert functions for you
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Working with Dates and Times In Thi
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The following array formula does th
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About the SUBTOTAL function Chapter
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You can specify more complex filter
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Round it up to the nearest penny.
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Introducing VBA In This Chapter ●
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Immediate window Chapter 22: Introd
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Appendixes Appendix A Excel Functio
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768 Part VII: Appendixes Turn off
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770 Index array formulas (continued
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772 Index CONVERT function, 275-277
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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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