Last data update: 2014.03.03
metricsgraphics marker lines are vertical lines that identify, say, events or dates worth annotating. This function lets you add a marker to a plot object. you can add as many as you need to.
mjs_add_marker(mjs, x_value, label)
mjs
metricsgraphics plot object
x_value
which x value to draw the marker at
label
text label for the marker
metricsgraphics object
data.frame( year=seq(1790, 1970, 10), uspop=as.numeric(uspop) ) %>% mjs_plot(x=year, y=uspop) %>% mjs_line() %>% mjs_add_marker(1850, "Something Wonderful") %>% mjs_add_baseline(150, "Something Awful")