Issue - July 2013
In our Hidden Secrets in Data Analysis course, we usually ask our participants to accurately define the range they are referring to. We learnt that for some participants who had used VLOOKUP before, they were previously taught to LOOKUP the entire column from another worksheet/range/workbook. And they often asked us if there is any difference between the two options, referring to the specific range only or the entire column. If you are working with Excel 2003 and below, looking up the entire column basically means referring to only 65,000 rows. In Excel 2007 and beyond, it is looking for 1 million rows.
The verdict? It is now okay in Excel 2007 to specify the entire column of 1 million rows when you use VLOOKUP. Microsoft has changed the way Excel works in version 2007. It will only calculate up the last used cell even if you refer to the entire column.
While this may be true for VLOOKUP, it may not be true for some other formulas, known as volatile formulas as well as conditional formatting. Therefore, we still highly recommend that you identify the specific range for your formula instead of selecting the entire column for the sake of convenience. You may work against you in the end.
Another improvement they have done to Excel 2007 is the speed of calculation. In version 2007, Excel will calculate formulas that are linked to a particular cell instead of recalculating the entire worksheet when the cell changes value.
Question: Pivot Table help needed
I have a matrix with survey sites as rows and sponge species as columns. Cells have the sponge abundance for each site and species. I want to extract the 10 most abundant species for each site, with the corresponding abundance, and put these values into a new matrix....
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Hidden Secrets in Data Analysis with Excel 2007/2010 - 1 & 2 Aug 2013
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