legend ( "topleft", c("cars", "trucks", "cars1", "trucks1"), text.col=c("blue", "red", "yellow", "green") ). Use the ?legend command to see ... ... <看更多>

As an example, a circular plot which contains two tracks and links inside the circle is generated. The first track will have a legend that contains points, ... ... <看更多>

You can add a title to the legend using legend.args in the call to plot the raster. E.g: library(raster) plot(elevRaster, legend.args ... ... <看更多>

I have struggled to use transparent colors with geom_rect and geom_ribbon. I haven't been able to find a consistent way to get the legend ... ... <看更多>