Page 364 - Excel 2007 Bible

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Introducing Array Formulas
Don’t enter the curly brackets when you create an array formula; Excel inserts them for you. If the result of
an array formula consists of more than one value, you must select all the cells in the results range before you
enter the formula. If you fail to do so, only the first element of the result is returned.
Selecting an array formula range
You can select the cells that contain a multicell array formula manually by using the normal cell selection
procedures. Or you can use either of the following methods:
Editing ➪ Find & Select ➪ Go To (or just press F5). In the Go To dialog box, click the Special
button and then choose the Current Array option. Click OK to close the dialog box.
n Activate any cell in the array formula range and press Ctrl+/ to select the entire array.
Editing an array formula
If an array formula occupies multiple cells, you must edit the entire range as though it were a single cell.
The key point to remember is that you can’t change just one element of an array formula. If you attempt to
do so, Excel displays the message shown in Figure 17.7.
FIGURE 17.7 n Activate any cell in the array formula range. Display the Go To dialog box by choosing Home ➪ 17
Excel’s warning message reminds you that you can’t edit just one cell of a multicell array formula.
The following rules apply to multicell array formulas. If you try to do any of these things, Excel lets you
know about it:
n You can’t change the contents of any individual cell that makes up an array formula.
n You can’t move cells that make up part of an array formula (but you can move an entire array
formula).
n You can’t delete cells that form part of an array formula (but you can delete an entire array).
n You can’t insert new cells into an array range. This rule includes inserting rows or columns that
would add new cells to an array range.
n You can’t use multicell array formulas inside of a table that was created by choosing Insert ➪
Tables ➪ Table. Similarly, you can’t convert a range to a table if the range contains a multicell
array formula.
To edit an array formula, select all the cells in the array range and activate the Formula bar as usual (click it
or press F2). Excel removes the brackets from the formula while you edit it. Edit the formula and then press
Ctrl+Shift+Enter to enter the changes. All the cells in the array now reflect your editing changes.

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