R- Connecting the maximum and the minimum value of two adjacent categorical variables in ggplot2 -


i have scatter plot now. each color represent categorical group , each group has range of values on x-axis. there should not overlapping between range of categorical variables. however, because of thickness of scatter points, looks there overlapping. so, want draw line connect maximum point of group , minimum point of adjacent group long line not have negative slope, can show there no overlapping between each categorical variable.

i not know how use geom_line() connect 2 points y-coordinate categorical variable. possible so??

any appreciated!!!

enter image description here

it sounds want geom_segment not geom_line. you'll need aggregate data new data frame has points want plotted. adapted brian's sample data , use dplyr this:

# sample data df <- data.frame(xvals = runif(50, 0, 1)) df$cats <- cut(df$xvals, c(0, .25, .625, 1))  # aggregation library(dplyr) df_summ = df %>% group_by(cats) %>%     summarize(min = min(xvals), max = max(xvals)) %>%     mutate(adj_max = lead(max),            adj_min = lead(min),            adj_cat = lead(cats))  # plot ggplot(df, aes(xvals, cats, colour = cats)) +     geom_point() +     geom_segment(data = df_summ, aes(         x = max,         xend = adj_min,         y = cats,         yend = adj_cat     ))

enter image description here

you can keep segments colored previous category, or maybe set them neutral color don't stand out much.


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