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Oddities with the linfit function [message #91622]

Thu, 06 August 2015 14:51

wdolan
Messages: 29
Registered: June 2015

Junior Member

I've got an array for X, and an array for y.

so I do this

plot, x,y, psym=1
result=linfit(x,y)
print, result

and instead of getting the usual 2 things that are the m and the b of the y=mx+b, I get three. The first two things I think are the m and b, and the third thing I though was the r^2. But if I multiply the x value by -1 so everything flips, then do linfit, I get the identical third value, but negative...

Not sure why I get three things, and I'm not sure how to get the real r^2 value.

Thanks for your help!

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[Message index]

		Oddities with the linfit function By: wdolan on Thu, 06 August 2015 14:51
		Re: Oddities with the linfit function By: wdolan on Thu, 06 August 2015 15:04
		Re: Oddities with the linfit function By: Helder Marchetto on Thu, 06 August 2015 15:08

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