How Do You Use The Legend Command In R?

How do you plot a Barplot in R?

Let’s create a simple bar chart in R using the barplot() command, which is easy to use.

First, we set up a vector of numbers.

Then we count them using the table() command, and then we plot them.

The table() command creates a simple table of counts of the elements in a data set..

What’s a legend?

A legend is a genre of folklore that consists of a narrative featuring human actions perceived or believed both by teller and listeners to have taken place within human history. Narratives in this genre may demonstrate human values, and possess certain qualities that give the tale verisimilitude.

What is Lty R?

In R base plot functions, the options lty and lwd are used to specify the line type and the line width, respectively. In ggplot2, the parameters linetype and size are used to decide the type and the size of lines, respectively.

How do I change the legend position in R?

Control legend position with legend. You can place the legend literally anywhere. To put it around the chart, use the legend. position option and specify top , right , bottom , or left . To put it inside the plot area, specify a vector of length 2, both values going between 0 and 1 and giving the x and y coordinates.

How do you change the size of a legend in Matplotlib?

legend() to change the font size of a Matplotlib legend. Call matplotlib. pyplot. legend(list, prop={‘size’: new_size}) twith list as a list of labels and new_size as an integer to change the font size to new_size .

How do you plot a bar graph?

On a graph, draw two lines perpendicular to each other, intersecting at 0. The horizontal line is x-axis and vertical line is y-axis. Along the horizontal axis, choose the uniform width of bars and uniform gap between the bars and write the names of the data items whose values are to be marked.

What is the function used to save the plot?

Functions that help us save plots in this format are jpeg() , png() , bmp() and tiff() . We will use the temperature column of built-in dataset airquality for the remainder of this section as example.

How do you do a legend in R?

This post explains how to add a legend to a chart made with base R, using the legend() function….Add a legend to a base R chartlegend : names to display.bty : type of box around the legend. … horiz : legend in column or in row.col : symbol color.pch : symbol type. … pt. … cex : text size.More items…

How do I add a legend to a Barplot in R?

In R you can add a legend to any plot using the legend() command. You can also use the legend = TRUE parameter in the barplot() command. The barplot() command is the only general plot type that has a legend parameter (the others need a separate legend).

How do I reduce the size of a legend in R?

By default, the area covered by legends for a plot created by using plot function is of full size that is 1 (the area size has a range of 0 to 1, where 1 refers to the full size and 0 refers to none). To reduce the size, we can use cex argument with the legend function as shown in the below example.

What is legend in plot?

The legend of a graph reflects the data displayed in the graph’s Y-axis, also called the graph series. … A graph legend generally appears as a box to the right or left of your graph. The box contains small samples of each color on the graph as well as a short description of what each color means.

What is the use of legend function in R?

legend() function in R Language is used to add legends to an existing Plot. A legend is defined as an area of the graph plot describing each of the parts of the plot. The legend plot is used to show statistical data in graphical form. bg: It defines background color for the legend box.

What does BTY mean in R?

The bty option of the par() function allows to custom the box around the plot.

How do you change the color of a bar graph in R?

Change barplot colors by groups It is also possible to change manually barplot line colors using the functions : scale_color_manual() : to use custom colors. scale_color_brewer() : to use color palettes from RColorBrewer package. scale_color_grey() : to use grey color palettes.