cosine {rioplot}

Compute the Cosine similarity between two points.

Description

Given two points, the function computes the cosine similarity between them.

Usage

cosine(x,y) 

Arguments

x

Point 1

y

Point 2

Value

The cosine similarity, ranging between -1 and +1.

Author(s)

Ronald L. Breiger, David Melamed and Eric Schoon

References

Schoon, Eric, David Melamed, and Ronald L. Breiger. 2023. Regression Inside Out. NY: Cambridge University Press.

Examples

data(Kenworthy99)
m1 <- lm(scale(dv) ~ scale(gdp) + scale(pov) + scale(tran) -1,data=Kenworthy99)
rp1 <- rio.plot(m1,include.int="no",r1=1:15)
cosine(rp1$row.dimensions[15,],rp1$row.dimensions[8,]) 
# cosine similarity between USA and Ireland

cosine(rp1$row.dimensions[15,],rp1$row.dimensions[14,]) 
# cosine similarity between USA and United Kingdom