[R] [FORGED] How does findAssocs() calculate the correlation value ??

[Rolf Turner]

On 07/07/17 13:55, θ ” wrote:
> hi:
> 
> I want to know the math behind the "tm" package findAssocs().
> 
> I have found that someone had asked the question before, and have a good explanation by Rick.
> 
> �]http://r.789695.n4.nabble.com/findAssocs-td3845751.html�^
> 
> 
> But I still don't understand how to calculate the correlation value between the two vectors.
> 
> 
> For example:
> 
> # Correlation word2 with word3
> 
>     cor(c(0,1,1,1,1),c(0,0,1,1,1))
>     [1] 0.6123724
> 
> 
> How does it caculate  cor(c(0,1,1,1,1),c(0,0,1,1,1)) to get 0.6123724 ?

Look in any first year statistics text for the definition of correlation.

cheers,

Rolf Turner


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