# spreadsheet calc on every other cell [closed]

I have the following sequence of data:

```
A B C D E
435 1 B 199
1194 1 C 199 759
1196 1 B 199
1993 1 C 199 797
1994 1 B 199
2303 1 D 199 309
```

Column E represents the column A minus the previous row in column A. So every other cell in column is calculated. When I drag down, each cell is calculated, instead of every other cell. How can I calculate for every other cell ? Also, I would like to count the number of "B's".

Spreadsheets of structures needing "every-other-row" formulas are supposed to be badly designed.

As far as I can see experienced users of Calc judge next to unanimous about this.

You should seriously consider to redesign the sheet before you get in trouble every other day.

Thanks, yes agreed, ideally the data should be loaded into a database and normalised, but the data above is simply a benchmark output from a C++ program. So I don't need it to be permanent.