Quick Answer: How Do I Add A Figure Legend In R?

Can a legend be drawn in a bar plot?

A single bar plot has only one bar object as you’ve drawn it above and, therefore, you can only assign one legend string because there is only a single graphic object on the plot to assign the legend to..

What is legend function r?

Legend function in R adds legend box to the plot. legend() function in R makes graph easier to read and interpret in better way. lets see an example on how to add legend to a plot with legend() function in R.

How do I reduce the size of a legend box 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.

How do you use the legend command in R?

R legend functionx 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.col : colors of lines and points beside the legend text.bg : the background color for the legend box.

IS function in R to get number of observation in a data frame?

The function str() shows you the structure of your data set. For a data frame it tells you: The total number of observations (e.g. 32 car types) The total number of variables (e.g. 11 car features) A full list of the variables names (e.g. mpg , cyl … )

How do you write a legend for a graph?

4 Features of a Good Figure Legend:Title: A brief title that applies to the entire figure, including all panels. … Materials and methods: A description of the techniques used. … Results: A statement of the results that can be gleaned from the particular figure. … Definitions: An explanation of features in the figure.

What is a legend on a bar graph?

The legend tells us what each bar represents. Just like on a map, the legend helps the reader understand what they are looking at. Legend examples can be found in the second and third graphs above.

How do you add a legend 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 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).