I wonder if it is possible to add longitude values to a map made with the
PlotStereoMap() function. I have seen many maps that do have the longitude, but I can't manage to plot it. I've tried everything, but there doesn't seem to be a parameter to incorporate them. Here is the map I am working with and the code with which I have achieved it.
PlotStereoMap(verano2008_med, lon, lat, latlims = c(-30,-90), toptitle = "SAM (+)", title_scale = 0.7, color_fun = clim.palette(palette = "bluered"), drawleg = F) ColorBar(vertical = F, subsampleg = 2, bar_limits = range(verano2008_med), color_fun = clim.palette(palette = "bluered"), plot = T, draw_ticks = T, draw_separators = F, title = "m2/s2", title_scale = 0.6, label_scale = 0.8, label_digits = 3, tick_scale = 0.4, extra_margin = c(6,1,6,1))