A chart source data challenge.....

[andy-s]

The data source expands with 4 values pr month, that’s 48 values pr year. My boss want a chart limited to the last max 12 values. It would be no problem if I he only wanted the last 12, BUT he also wants the opportunity to choose how many values should be displayed (but still limited to last max 12 values) each time!

The data source look like
Text (A1) – value (A2) – value (A3) – value (A3) - etc

Do you know how this could be done?

 

[Mark O'Brien]

It sounds like you're going to have to mess around with named ranges.

Have a look at the chart section of Stephen Bullen's site to see if anything there could be applied to what you want. (Your description doesn't make a whole lot of sense to me I'm afraid)

http://www.bmsltd.co.uk/Excel/Default.htm

 

[andy-s]

Thanks for your reply Mark.

The site you mentioned contains many good ideas, but none of them did solve my problem.

BUT, I did find a another site with excel tips where my problem was mentioned.

What I realy was looking for was a dynamic chart that plots only the lates x datavalues. You can read more about it at

http://www.erlandsendata.no/english/downloads/charts.htm


The basic is:
$A$1 = number of values shown

MonthCount=IF(COUNT(Sheet1!$A:$A)<12,COUNT Sheet1!$A:$A),$A$1)

DataSerie1=OFFSET(Sheet1!$B$1,COUNTA(Sheet1!$A:$A)-MonthCount,0,MonthCount,1)

=OFFSET(Sheet1!$A$1;COUNTA(Sheet1!$A:$A)-Sheet1!$A$1;0;Sheet1!$A$1;1)


Thx