https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #9 from Matthias Becht ---
(In reply to Yegor Kozlov from comment #8)
> Patched applied in r1845586. The fix will be included in upcoming 4.0.1
> release
Sorry that it took me so long to reply, I was fairly busy this week.
That se
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
Yegor Kozlov changed:
What|Removed |Added
Resolution|--- |FIXED
Status|NEW
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #7 from Yegor Kozlov ---
Created attachment 36218
--> https://bz.apache.org/bugzilla/attachment.cgi?id=36218&action=edit
Trend handling all X's being the same
Remove the directive in cells A65 and A66. These tests pass with this
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #6 from Yegor Kozlov ---
I'm inclined to commit the patch as it is. The code is great and perfectly
covers the basic functionality. The edge cases is a subtle area . Excel
handles them differently from OpenOffice and Google Spreads
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #5 from Matthias Becht ---
Hmm, I just remembered what the biggest problem was, which I forgot to mention
before. There needs to be at least one more sample than there are x variables
in order for the multiple linear regression to w
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #4 from Yegor Kozlov ---
>> - So if all x and y values are the same, Excel just returns that value, no
>> matter what?
I concluded it empirically and it seems to be true. The only exception are cass
when Excel returns !REF#, but t
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #3 from Matthias Becht ---
I'm still not entirely sure about all of Excel's behavior:
- So if all x and y values are the same, Excel just returns that value, no
matter what?
- If the y's are different but all x's are the same, Com
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #2 from Yegor Kozlov ---
Pretty impressive. This definitely should go in trunk.
The not implemented cases aren't a problem of Commons Math.
>From a mathematical standpoint one needs minimum two data points to perform
linear regre
https://bz.apache.org/bugzilla/show_bug.cgi?id=62836
--- Comment #1 from Matthias Becht ---
Created attachment 36201
--> https://bz.apache.org/bugzilla/attachment.cgi?id=36201&action=edit
Test cases for TREND
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