R Under development (unstable) (2023-08-20 r84995 ucrt) -- "Unsuffered Consequences"
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> ## exposure.test.R
> ## Yang Lu Yang.Lu@williams.edu
> 
> library(pa)
> 
> ## data(jan)
> ## b1 <- brinson(x = jan)
> ## truth <- exposure(b1, var = "sector")
> ## data(quarter)
> ## b2 <- brinson(x = quarter)
> ## truth.multi <- exposure(b2, var = "sector")
> ## save(truth, truth.multi, file = "exposure.test.RData")
> 
> load("exposure.test.RData")
> 
> ## Single-period
> 
> data(jan)
> b1 <- brinson(x = jan)
> result <- exposure(b1, var = "sector")
> stopifnot(all.equal(result, truth))
> 
> ## Multi-period
> 
> data(quarter)
> b2 <- brinson(x = quarter)
> result.multi <- exposure(b2, var = "sector")
> stopifnot(all.equal(result.multi, truth.multi))
> 
> 
> proc.time()
   user  system elapsed 
   1.34    0.20    1.51