## Monday, February 27, 2006

### SUMPRODUCT array formulas in Excel

I have written about these before as a way of summing data from tables using multiple selection criteria.

SUM(range) just sums a range of cells.
SUMIF(criteria range, criteria, sum range) sums data in one range based on results in a parallel range.
SUMPRODUCT((array1="criteria")*(array2="criteria")*(array3)) entered with CTRL SHIFT ENTER returns the sum of the data in the array3 where the crietria in arrays one and two are met. This can be expanded a lot.

Chris Pearson (as always) is one of the definitive sources for array forumlas.
Bob Phillips from the UK has written a very detailed page that very carefully explains how this works and how to use it with some practical examples.

Reading them both will give you some very valuable insights into how array formulas work and how to utilise them in your spreadsheets.

• Arrays must be the same dimensions.

• Having invalid information (eg text) in the array can be ignored using the double unary operator like so SUMPRODUCT(--(array1="criteria")*(array2="criteria")*(array3)).

• Arrays cannot be a whole column, but can be a whole row.

Finally, if anybody knows anything about how Office 12 will treat these types of formulas I am sure the Excel community would be interested to know.

## Tuesday, February 21, 2006

### Urgent Request

I am in urgent need of a top level Excel and VBA guru to work on a project for one of my clients for a couple of months - starting immediately.
If you can locate to Brisbane and be available for about 2 months we are prepared to pay a good rate.

## Tuesday, February 14, 2006

### Resetting the last cell in Excel

Previously I have written about Identifying the last cell in Excel.

The microsoft website has an excellent article about how to reset the last cell.

Method 1
To reset the last cell by manually deleting excess rows and columns, follow these steps:
1. Select all columns to the right of the last column that contains data by selecting the appropriate column headings.

TIP: One way to do this is to press F5 and type the appropriate reference, for example F:IV for columns or 5:65536 for rows.
2. On the Edit menu, click Delete.
3. Repeat steps 1 and 2 for the rows that are under the last row that contains data.
4. On the File menu, click Save (click Save As if you want to keep the original file).
5. To continue working in the file, close, and then reopen the file.

Method 2
2. When you receive the licensing agreement, click Yes.
3. When you receive the WinZip Self-Extractor prompt, click the Browse button, and then select the location where you want the add-in to be extracted.

Note You can put the file in the Excel add-in location, where it will automatically show up in the Addins dialog box in Excel. That location is the Library folder in the Office install location, typically the C:\Program Files\Microsoft Office\Office\Library folder.

After you select the download location that you want in the Browse dialog box, click UnZip in the WinZip dialog box. Click OK on the successful download prompt, and then click Close in the WinZip dialog box.
4. Start Excel.

On the Tools menu, select Add-Ins. If you did not save the file to the Library folder, click the Browse button, locate the file, and then select it in the browse window. Click Excess Format Cleaner 1.1, and then click OK.
5. Open the workbook that you want to clean up, and then click Clear Excess Formatting in workbook on the File menu. The macro will then clear excess formatting from all worksheets in the file. When the macro is completed, you will be informed that you must save the workbook for the changes to be permanent.
6. Save, close, and then reopen the file.

## Saturday, February 11, 2006

### Using theTranspose function in Excel

Transposing in Excel refers to changing a range from vertical or horizontal orientation to the other.

One way to do this is to copy a range you want translated, eg a column of dates, and then using the Paste Special Function and selecting Transpose.

This will copy the exact range and translate it, but it doesn't allow you to create a dynamic range based on the previous range. In fact it works better if you select Paste As Values as well.

If you need to copy a columnar range and paste it as horizontal, yet have the target range change when the source range chanegs then the TRANSPOSE function is the way to do it.

Microsoft Excel Help says this about the TRANSPOSE function:

Returns a vertical range of cells as a horizontal range, or vice versa. TRANSPOSE must be entered as an array formula in a range that has the same number of rows and columns, respectively, as an array has columns and rows. Use TRANSPOSE to shift the vertical and horizontal orientation of an array on a worksheet.

Syntax
TRANSPOSE(array)

Array is an array or range of cells on a worksheet that you want to transpose. The transpose of an array is created by using the first row of the array as the first column of the new array, the second row of the array as the second column of the new array, and so on.
Note: The formula in the example must be entered as an array formula. To do this press CTRL+SHIFT+ENTER when entering the formula. If the formula is not entered as an array formula, the single result is 1.

In my example we are going to copy a range of dates in a column and transpose them.

First of all enter your dates. I did this by typing =TODAY() in the first cell and then in the second cell added the cell above plus 1. This was then copied for 7 more cells giving 9 in total.

Now I select the cell I wanted the dates to go horizontally in. I also selected the 8 cells to the right, in total the same number of cells as the source array.
With them selected and the focus on the first cell I type =TRANSPOSE( and then select the 9 cells of dates in one column and finish up with the closing bracket. Now I hold down CTRL and SHIFT and click ENTER.
Presto! the 9 cells in the row now link directly to the dates in the column.
All that is needed is to format the cells to date format and we have our new horizontal date range linked to the vertical one. Change any of the vertical cells and the horizontal ones reflect the same change.

## Tuesday, February 07, 2006

### Excel MVP and Professional Guru association ideas

Interesting discussion on Dicks Blog regarding Excel MVPs.

Heres my two cents.

If I may add my two cents I think that the MVP program should remain firmly where it is (as defined by Sean) and that a separate peer nominated program for Guru status (technical competence) be created. It should be separate to Microsoft and probably be a professional organisation. It whould not be based on fee for service but be nominated by users clients or by yourself and then judged on a number of tecnhical merits.
As in any undertaking like this there would be numerous pitfalls to overcome in the first rounds of creation and ongoing tweaks to be made, but this could be recognised and dealt with by 5 yearly reviews of the system.
The concept of fellows within this organisation should definitely be promoted.
My pick for lifetime members is obiously biased by my reality but would definitely include John Walkenbach, Chip Pearson.
Founding members would include Dick, Jon, Steve, Andy, Colo and more (not trying to leave anybody out).
Professional membership fees would be charged to cover the admin costs of such a professional body.

What do you think?