two_color_map {nodiv}

Plot the relative amounts of two variables using a purple-green color scheme

Description

Plots site statistics from objects in the nodiv package

Usage

two_color_map(distrib_data, vec1, vec2, res = 10, showlegend = T, 
  legend_coords = c(0.2, 0.26, 0.36, 0.44), type = c("auto", "grid", "points"), 
  colour = c("green_purple", "green_red_purple_cyan"), ...)

Arguments

distrib_data

An object of type distrib_data, nodiv_data or nodiv_result, or, alternatively, an object of spatial points from package sp, or a matrix of xy values in two columns

vec1

A site statistic to be plotted, such as species richness or mean temperature. This can be a vector of values or the name of a site statistic in distrib_data.

vec2

The oter site statistic to be plotted.

res

The resolution of colors on the color legend

showlegend

A boolean specifying whether to show the legend

legend_coords

A vector x1, x2, y1, y2 specifying the location and extent of the color legend

type

To specify whether to plot as spatial points or a grid

colour

What colour scheme to use for plotting

...

Further arguements to the plotting function

Value

A data.frame giving codes and indices of the colors shown in the plot

Author(s)

Michael Krabbe Borregaard

See Also

distrib_data plot_points