How to adjust the ratio to compare the data in two variables?

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Brian Kim
Brian Kim 2017-10-18
评论： Brian Kim 2017-10-19
There are two different variables.
A=[107.5383 47.4492 36.4819 26.4964];
B=1.0e+03 * [4.1876 3.5687 3.4444 3.4548];
I want to know the correlation between A and B.
But, it is too large difference between A and B.
in that case, how to adjust?

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采纳的回答

Jos (10584)
Jos (10584) 2017-10-18
You can transform your data linearly into, for instance, z-scores, to get a "normal" range of values. This does not change the correlation, so the answer by Walter is the one to follow!
A=[107.5383 47.4492 36.4819 26.4964];
B=1.0e+03 * [4.1876 3.5687 3.4444 3.4548];
% z-score transformation
Az = (A - mean(A)) ./ std(A)
Bz = (B - mean(B)) ./ std(B)
plot(Az,Bz,'bo')
corr(Az(:),Bz(:))

更多回答（1 个）

Walter Roberson
Walter Roberson 2017-10-18
>> corr(A(:),B(:))
ans =
0.991036262555985

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