R Under development (unstable) (2025-09-14 r88831 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> test_check("MAINT.Data")
Loading required package: MAINT.Data
Loading required package: Rcpp

Attaching package: 'MAINT.Data'

The following objects are masked from 'package:base':

    cbind, rbind

Error rate estimates of algorithm lda 
    Adult       Old     Young    Global 
0.2222222 0.4285714 0.5000000 0.3750000 

Confusion matrix (original classes in rows, predicted in columns)

Absolute frequencies

      Adult Old Young
Adult     7   2     0
Old       3   4     0
Young     3   1     4

Relative frequencies

      Adult   Old Young
Adult 0.778 0.222   0.0
Old   0.429 0.571   0.0
Young 0.375 0.125   0.5
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 209 ]
> 
> proc.time()
   user  system elapsed 
   5.14    0.26    5.39