Error(s) in re-building vignettes:
  ...
--- re-building ‘UAHDataScienceUC.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/UAHDataScienceUC.Rcheck/vign_test/UAHDataScienceUC/vignettes/UAHDataScienceUC_files/figure-html/unnamed-chunk-3-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 6861 bytes
Input file size = 6939 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 5152
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 5152

Output IDAT size = 5152 bytes (1709 bytes decrease)
Output file size = 5230 bytes (1709 bytes = 24.63% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/UAHDataScienceUC.Rcheck/vign_test/UAHDataScienceUC/vignettes/UAHDataScienceUC_files/figure-html/unnamed-chunk-4-1.png
288x288 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 4099 bytes
Input file size = 4957 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3666
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3666

Output IDAT size = 3666 bytes (433 bytes decrease)
Output file size = 3744 bytes (1213 bytes = 24.47% decrease)

** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/UAHDataScienceUC.Rcheck/vign_test/UAHDataScienceUC/vignettes/UAHDataScienceUC_files/figure-html/unnamed-chunk-5-1.png
288x288 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 5353 bytes
Input file size = 5431 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3970
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 3970

Output IDAT size = 3970 bytes (1383 bytes decrease)
Output file size = 4048 bytes (1383 bytes = 25.46% decrease)


Quitting from UAHDataScienceUC.Rmd:83-93 [unnamed-chunk-6]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `solve.default()`:
! Lapack routine dgesv: system is exactly singular: U[2,2] = 0
---
Backtrace:
    ▆
 1. └─UAHDataScienceUC::gaussian_mixture(...)
 2.   ├─UAHDataScienceUC:::sum_finite(...)
 3.   └─base::sapply(...)
 4.     └─base::lapply(X = X, FUN = FUN, ...)
 5.       └─UAHDataScienceUC (local) FUN(X[[i]], ...)
 6.         └─UAHDataScienceUC:::dmnorm(...)
 7.           ├─base::diag(diff %*% solve(sigma) %*% t(diff))
 8.           ├─base::solve(sigma)
 9.           └─base::solve.default(sigma)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'UAHDataScienceUC.Rmd' failed with diagnostics:
Lapack routine dgesv: system is exactly singular: U[2,2] = 0
--- failed re-building ‘UAHDataScienceUC.Rmd’

SUMMARY: processing the following file failed:
  ‘UAHDataScienceUC.Rmd’

Error: Vignette re-building failed.
Execution halted