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For me, Bert's suggestion produces a plot with two black symbols above the plotting region, a circle and a triangle, both filled, and no text. This, in which I specify several features of the symbols in the key, dd %>% dotplot( segment ~ transit_time, groups = impact, data = ., pch = 16:17, col = 1:2, cex = 1.8, scales = list(cex = 1.4), key = list(text = list(c("impaction", "no impaction")), points = list(pch =16:17, col = 1:2) )) gets me wha...

...cal.com> wrote: > > For me, Bert's suggestion produces a plot with two black symbols above > the plotting region, a circle and a triangle, both filled, and no text. > > This, in which I specify several features of the symbols in the key, > > dd %>% dotplot( segment ~ transit_time, groups = impact, data = ., > pch = 16:17, > col = 1:2, > cex = 1.8, > scales = list(cex = 1.4), > key = list(text = list(c("impaction", "no impaction")), > points = list(pch =16:...

I am making a dotplot with lattice, as follows: dd %>% dotplot( segment ~ transit_time, groups = impact, data = ., as.table = TRUE, pch = 16:17, cex = 1.8, scales = list(cex = 1.4), auto.key = TRUE) impact is a factor with two levels. They key shows 2 open circles, one of each color of my two plotting s...