Plot graduated symbols based on quantitative data.
mf_grad(
x,
var,
breaks = "quantile",
nbreaks = 3,
col = "tomato4",
border,
pch = 21,
cex,
lwd,
leg_pos = mf_get_leg_pos(x),
leg_title = var,
leg_title_cex = 0.8,
leg_val_cex = 0.6,
leg_val_rnd = 2,
leg_frame = FALSE,
add = TRUE
)
object of class sf
name(s) of the variable(s) to plot
either a numeric vector with the actual breaks, or a classification method name (see mf_get_breaks and Details)
number of classes
color
border color
pch (point type) for symbols
cex (point size) for symbols
border width
position of the legend, one of 'topleft', 'top','topright', 'right', 'bottomright', 'bottom', 'bottomleft', 'left' or a vector of two coordinates in map units (c(x, y)). If leg_pos = NA then the legend is not plotted. If leg_pos = 'interactive' click onthe map to choose the legend position.
legend title
size of the legend title
size of the values in the legend
number of decimal places of the values in the legend
whether to add a frame to the legend (TRUE) or not (FALSE)
whether to add the layer to an existing plot (TRUE) or not (FALSE)
x is (invisibly) returned.
Breaks defined by a numeric vector or a classification method are
left-closed: breaks defined by c(2, 5, 10, 15, 20)
will be mapped as [2 - 5[, [5 - 10[, [10 - 15[, [15 - 20].
The "jenks" method is an exception and has to be right-closed.
Jenks breaks computed as c(2, 5, 10, 15, 20)
will be mapped as [2 - 5], ]5 - 10], ]10 - 15], ]15 - 20].
mtq <- mf_get_mtq()
mf_map(mtq)
mf_grad(mtq, "POP", pch = 22)