### autofill in calc

Gary Collins <gcatlast <at> yahoo.co.uk>

2014-09-16 11:25:27 GMT

Hello,
I've been using autofill and noted some things, not so much bugs but queries about the way it works and if it
could be better.
1) I enter (e.g.) 2, 4 and 6 into cells B1-B3
2) I then highlight these cells and use autofill to extend to B4-B9, and I get 8,10,12,14,16,18 in these
cells - exactly as expected.
3) If instead I extend only to B6 (but leave the selection in place), I get 8,10,12 in those cells.
4) I can then resume the extension to B9, and get 14,16,18 in B7-B9 - as in (2). Again as expected.
Here's where the fun starts:
5) Instead of 2, 4 and 6, I enter 2, 4 and 7 into cells B1-B3.
6) I use autofill to extend to B4-B9 as before. I get 3,5,8,4,6,9 in B4-B9.
#It took me a little while to work out what is going on (when I noticed this I was using less related numbers and
wasnt extending so far, so the pattern was less obvious). It seems that each of the cells B1-B3 is
incremented by 1 to obtain the fill values for B4-B6, then again for B7-B9.
7) If I repeat step (3) with these values, I get 3,5,8 in cells B4-B6. BUT:
8) when I resume extension to B9, I don't get 4,6,9 but I get 3,5,8 repeated.
#This strikes me as very odd indeed.
Q: Is there a logical reason for this behaviour? Wouldn't it be better if Calc were to use differences and
obtain the values 11,16,22,29,37,46 to fill B4-B9?
Aside: I notice Excel doesn't cope well with this situation either - it produces some (fractional values
which I haven't analysed).
In any case, surely step 8 should return the same result as step 6 (?).
(OK, that's 3 questions!)

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