Add vignette with analysis of pistacho quality.

2 jobs for master in 3 minutes and 44 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
failed #8747
r devtools knitr rmarkdown testthat
R_build_package

00:03:44

failed #8423
r devtools knitr rmarkdown testthat
R_build_package

00:03:53

 
Name Stage Failure
failed
R_build_package Test There is an unknown failure, please try again

trying URL 'https://cran.rstudio.com/src/contrib/viridisLite_0.2.0.tar.gz'
Content type 'application/x-gzip' length 48073 bytes (46 KB)
==================================================
downloaded 46 KB

Error: Command failed (1)
Execution halted
ERROR: Job failed: exit code 1