A Chart Expression That Works Differently for Totals Row

I built a QlikView document last week with a straight table chart where I needed to have some of the expressions work differently on the totals row than on the regular rows. One of the dimensions on the chart was date -- but the totals row needed to aggregate data for the most recent date only. I wrote an expression that takes advantage of the fact that the RowNo function returns null for the totals row. So, leaving out the actual calculation part, the expression looked something like this:
if(IsNull(RowNo()),
/* do the totals row calculation */ ,
/* else, do the regular calculation */)

A similar idea can be used if you want to change the color or bold the totals row. For example, you could use an expression like this for background color:
if(IsNull(RowNo()),yellow())

and make the totals row look like it is emphasized with a highlighter color.

Important note: If you use the RowNo() function in your column expression you will not be able to re-sort the chart by double-clicking on a column title. If that is a problem for your application then use if(Dimensionality()=0,... as a substitute.

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