offset for type_barplot

[grantmcdermott]

Needed this for work today.

pkgload::load_all("~/Documents/Projects/tinyplot/")
#> ℹ Loading tinyplot

tinyplot(extra ~ ID, data = sleep[sleep$group == 1, ],
  type = type_barplot(offset = 10))

# waterfall chart

d = data.frame(item = c("Sales", "Services", "Costs", "Returns", "TOTAL"),
               value = c(100, 40, -80, -10, 50))
d$item = factor(d$item, levels = d$item)
d$offset = c(0, cumsum(d$value[1:3]), 0)
tinyplot(value ~ item | I(value < 0), data = d,
  type = type_barplot(offset = d$offset), legend = FALSE)
tinyplot_add(type = type_vline(4.5), lty = 2)

^{Created on 2026-06-05 with reprex v2.1.1}

HU @zeileis (one step towards #420)

[zeileis]

Very nice with a clear example!

In #420 I have now added a worked example how this could be used of displaying a "don't know" category on the side. It's not completely obvious but doable.