在R中，有没有垂直线符号不在数据点居中？

Question

Among the various line types available for mode='markers' in a plotly scatterplot is marker=list(symbol='line-ns-open') . This can be used to easily make vertical line segments centered at a specific y value. I could not find a line type that is vertical that uses the data point as its base instead of its center. Is there a way to do this?

Answer 1

I don't think there is a symbol that will do it, but you could use mode = "lines" in a for loop as done here . I adapted the following from the previous link:

x <- c(1:20, 1:20)
y <- (1:40) 
color <- rep(c(team1 = "blue", team2 = "red"), each = 20)

library(plotly)

p <- plot_ly()

for(i in seq_along(x)){
p <- add_trace(p,
    x = c(x[i], x[i]),
    y = c(y[i], y[i] + 1L), # make your lines as tall as you'd like
    group = names(color[i]),
    mode = "lines",
    line = list(width = 1L, color = color[i]),
    showlegend = FALSE,
    evaluate = TRUE)}

p