Issue 5085 - extrapolate regression lines (extend trendlines) (forward/backward forecast)
Summary: extrapolate regression lines (extend trendlines) (forward/backward forecast)
Alias: None
Product: General
Classification: Code
Component: chart (show other issues)
Version: 3.3.0 or older (OOo)
Hardware: PC Windows 2000
: P3 Trivial with 19 votes (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Keywords: ms_interoperability, rfe_eval_ok
: 4509 56578 90692 (view as issue list)
Depends on:
Blocks: 15522
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Reported: 2002-05-21 06:07 UTC by Unknown
Modified: 2013-09-25 20:42 UTC (History)
4 users (show)

See Also:
Issue Type: FEATURE
Latest Confirmation in: ---
Developer Difficulty: ---

xls (39.50 KB, application/
2006-04-27 10:05 UTC,
no flags Details
png (3.27 KB, image/png)
2006-04-27 10:06 UTC,
no flags Details
png (18.23 KB, image/png)
2006-04-27 10:06 UTC,
no flags Details

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Description Unknown 2002-05-21 06:07:37 UTC
There should be some way to not only display the equation for a trendline, but also to cast it 
backwards and forwards.  Often when charting experimental data, it is useful to find the slope and 
x or y intercepts.
Comment 1 dgrant 2002-11-12 16:41:15 UTC
This issue is defintely a must.  It should be implemented as soon as
somebody has the time.  I'm give my vote.
Comment 2 dgrant 2002-11-12 16:42:54 UTC
This is a dup of 5289
Comment 3 kla 2002-11-28 12:35:35 UTC

*** This issue has been marked as a duplicate of 5289 ***
Comment 4 kla 2002-11-28 12:36:18 UTC
Comment 5 IngridvdM 2005-04-14 15:02:33 UTC
reopen this one because the duplicate is a much to huge container bug - this one
can better be handled because it concentrates on a single feature.
Comment 6 IngridvdM 2005-04-14 15:04:07 UTC
->bm: Please take care of this issue.
Comment 7 IngridvdM 2005-04-14 16:31:45 UTC
*** Issue 4509 has been marked as a duplicate of this issue. ***
Comment 8 bjoern.milcke 2005-04-19 15:40:24 UTC
accepted as a feature task for implementing the extrapolation of trendlines
(regression curves)
Comment 9 IngridvdM 2006-03-08 20:55:36 UTC
*** Issue 56578 has been marked as a duplicate of this issue. ***
Comment 10 IngridvdM 2006-03-08 20:57:07 UTC
added 'trendline' to summary for better searching
Comment 11 IngridvdM 2006-03-21 17:10:15 UTC
added '(forward/backward forecast)' to summary for easier finding this issue
Comment 12 2006-04-27 10:05:59 UTC
Created attachment 36094 [details]
Comment 13 2006-04-27 10:06:25 UTC
Created attachment 36095 [details]
Comment 14 2006-04-27 10:06:46 UTC
Created attachment 36096 [details]
Comment 15 kla 2008-06-17 08:12:52 UTC
*** Issue 90692 has been marked as a duplicate of this issue. ***
Comment 16 IngridvdM 2008-07-03 11:39:56 UTC
change owner
Comment 17 IngridvdM 2008-07-22 14:22:14 UTC
reset to new
Comment 18 davesemmens 2010-01-14 02:14:48 UTC
I voted for this issue, but resolving the problem that is brought up in the
duplicate issue 90692 is far more important to me. Extending trend lines beyond
the range of data plotted in a nice feature, but extending trend lines beyond
the plotted data is statistically inappropriate in most cases. I would suggest
that plotting the trend line so that it does not extend beyond the plotted
values should be the default.