[Tachart] Linear regression
lazarus / 55-TAChart

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pacific2 · 2010-08-08 10:13

Dear all
I have a set of data in a lineseries and I want to compute the
parameters (a and b) of a linear regression (y= ax+b). I read (I don't
remember where) that tachart have a buitin function that make it easy.

if I'm wrong I can of course built my own regression function.

regards

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Leledumbo · 2010-08-08 10:28

You can use LazStats for this.

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pacific2 · 2010-08-08 14:30

Thanks Leledumbo
Impressive project. May be a litle bit complex for what I need at the
moment but I keep the link. I certainly need to use it in a near
future.

Just for information. The sources as availlable for windows does not
compile with my lazarus version. I had to add in the matmanunit.pas
unit the keeword "var" before the list of variable at the line 246
just above the public declarations. After that it compile well.

regards

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Ask · 2010-08-08 17:02

Quote from: pacific2 on August 08, 2010, 12:13:45 pmI have a set of
data in a lineseries and I want to compute the parameters (a and b) of
a linear regression (y= ax+b). I read (I don't remember where) that
tachart have a buitin function that make it easy.

if I'm wrong I can of course built my own regression function.

No, TAChart only has TFuncSeries that makes displaying of your
functions easy.
I am open to suggestions and patches for extending TAChart in this
direction :-)

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Ask · 2010-08-08 17:05

Quote from: pacific2 on August 08, 2010, 04:30:14 pmQuote from:
Leledumbo on August 08, 2010, 12:28:17 pmYou can use LazStats for
this.
Impressive project.

Indeed. Why does not it use TAChart, I wonder?