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A legend of a plot helps to understand which series or groups corresponds to each bar, line, box or observations, based on its type, color or both. In this tutorial you will learn how to add a legend to a plot in base R and how to customize it.
16 Μαΐ 2021 · Legends are useful to add more information to the plots and enhance the user readability. It involves the creation of titles, indexes, placement of plot boxes in order to create a better understanding of the graphs plotted. The in-built R function legend () can be used to add legend to plot.
Add and customize the legends in ggplot2. Learn how to change the title, the labels, the keys, how to modify the background color, change its position or get rid of it
Example 1: Adding Simple Legend to Plot. Example 1 explains how to add a legend to our plot using the legend () function in R. For this, we first have to draw our plot (as we already did before) and then we have to apply the legend function as shown below: plot (x, y, pch = 16, col = group) # Draw plot without legend .
To add legends to plots in R, the R legend () function can be used. A simplified format of the function is : legend(x, y=NULL, legend, fill, col, bg) x and y : the x and y co-ordinates to be used to position the legend. legend : the text of the legend. fill : colors to use for filling the boxes beside the legend text.
This function can be used to add legends to plots. Note that a call to the function locator (1) can be used in place of the x and y arguments. Usage. legend(x, y = NULL, legend, fill = NULL, col = par("col"), border = "black", lty, lwd, pch, angle = 45, density = NULL, bty = "o", bg = par("bg"),
This post explains how to add a legend to a chart made with base R, using the legend() function. It provides several reproducible examples with explanation and R code.
