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Re: How to plot linear regression relation of two array? [message #65033 is a reply to message #65032]

Mon, 09 February 2009 14:39

pgrigis
Messages: 436
Registered: September 2007

Senior Member

With all due respect, if you don't know
what R^2 is, why do you want to put
it in your plot? What will you do when
somebody asks you "what is R"?

Ciao,
Paolo

Hu wrote:
> On Feb 9, 12:12 pm, Vince Hradil <vincehra...@gmail.com> wrote:
>> On Feb 9, 1:45 pm, Hu <jha...@gmail.com> wrote:
>>
>>> Hi,
>>
>>> I am trying to plot a linear regression relation of two array
>>> (supposing A and B) by using IDL. What I want is to got a chart like
>>> this link shows (the group is unable to post figure directly):http://serc.carleton.edu/images/introgeo/teachingw data/LeastSquaresGr...
>>
>>> especially, How can I got the black straight line and the coefficients
>>> R^2 ?
>>
>>> Thanks
>>
>> Have you looked in the help for linfit()?
>
> BTW, I set MEASURE_ERRORS to SQRT(ABS(Y)), just follow the example,
> but what is MEASURE_ERRORS? and what is R^2 mean in the above picture?
>
> Thank you very much

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[Message index]

		Re: How to plot linear regression relation of two array? By: Vince Hradil on Mon, 09 February 2009 15:09
		Re: How to plot linear regression relation of two array? By: pgrigis on Mon, 09 February 2009 14:39
		Re: How to plot linear regression relation of two array? By: Hu on Mon, 09 February 2009 13:21
		Re: How to plot linear regression relation of two array? By: David Fanning on Mon, 09 February 2009 13:20
		Re: How to plot linear regression relation of two array? By: Vince Hradil on Mon, 09 February 2009 13:13
		Re: How to plot linear regression relation of two array? By: Hu on Mon, 09 February 2009 12:51
		Re: How to plot linear regression relation of two array? By: Hu on Mon, 09 February 2009 12:42
		Re: How to plot linear regression relation of two array? By: Vince Hradil on Mon, 09 February 2009 12:12

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