Compute pretty breaks using R function base::pretty.

Parameters:

• s sequence of values
• opts options for pretty,
  • :n number of breask is supported by all implementations

• impl An implementation keyword, either

  • :ocpu Uses an online service https://www.opencpu.org/api.html (server: cloud.opencpu.org)
  • :renjine Uses https://renjin.org/
  • :clojisr Uses https://github.com/scicloj/clojisr, which requires a local R installation
  • :wadogo Uses plotje/wadogo (which has quite different notion of ‘pretty’ compared to R)

Each implementation requires dependencies to be added:

• :ocpu : opencpu-clj/opencpu-clj “0.3.1”
• :renjin : org.renjin/renjin-script-engine “3.5-beta76”
• :clojisr : scicloj/clojisr “1.1.0”

Returns seq of the breaks, which R considers ‘pretty’