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CORRELATE where is the problem? [message #65472]

Sun, 08 March 2009 10:40

xiao zhang
Messages: 81
Registered: June 2008

Member

Hi~ everyone. I have a simple question here. I have two arrays and I
calculated the correlation between them. The result is 0.49. But when
I use the equation to calculate the correlation. The result is 0.99.
And I can see from the plot that they are actually highly correlated.
Why is that? THX

openr,1,'data.txt'
data=fltarr(2,1227)
readf,1,data

temp=data(1,*)
oo=data(0,*)
;print,temp(0)

temp=reform(temp)
oo=reform(oo)

corr=CORRELATE(oo,temp)
print,corr
rr=LINFIT(temp,oo)
print,rr
plot,psym=2,temp,oo

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[Message index]

		CORRELATE where is the problem? By: xiao zhang on Sun, 08 March 2009 10:40
		Re: CORRELATE where is the problem? By: Brian Larsen on Mon, 09 March 2009 05:24
		Re: CORRELATE where is the problem? By: David Fanning on Sun, 08 March 2009 13:52

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