Ggplot change legend title

A legend helps understand what the different plots on the same graph indicate. They basically provide labels or names for useful data depicted by graphs. In this article, we will discuss how legend names can be changed in R Programming Language.

The goal of this R tutorial is to describe how to change the legend of a graph generated using ggplot2 package. Make sure that the variable dose is converted as a factor variable using the above R script. The allowed values for the arguments legend. Note that, the argument legend. In this case it is possible to position the legend inside the plotting area. Their values should be between 0 and 1.

Ggplot change legend title

Start by creating a box plot using the ToothGrowth data set. Change the box plot fill color according to the grouping variable dose. The function labs can be used to easily update the legend title for a given aesthetic fill, color, size, shape, linetype, … :. Legend loction can be also a numeric vector c x,y , where x and y are the coordinates of the legend box. Their values should be between 0 and 1. This makes it possible to place the legend inside the plot. In this case the argument guide is used as follow. We introduce how to easily change a ggplot legend title, position and labels. The different steps are summarized as follow. This R graphics tutorial shows how to customize a ggplot legend. In the default setting of ggplot2, the legend is placed on the right of the plot. Reverse legend order.

Thank you for your valuable feedback! Let us first see what legend title appears by default.

You can also remove all the legends in a graph, using theme. There are two ways of changing the legend title and labels. The first way is to tell the scale to use have a different title and labels. The second way is to change data frame so that the factor has the desired form. The legend can be a guide for fill , colour , linetype , shape , or other aesthetics.

The aim of this tutorial is to describe how to modify plot titles main title , axis labels and legend titles using R software and ggplot2 package. The argument label is the text to be used for the main title or for the axis labels. Make sure that the variable dose is converted as a factor using the above R script. Change plot titles by using the functions ggtitle , xlab and ylab :. It is also possible to change legend titles using the function labs :. This analysis has been performed using R software ver.

Ggplot change legend title

A legend helps understand what the different plots on the same graph indicate. They basically provide labels or names for useful data depicted by graphs. In this article, we will discuss how legend names can be changed in R Programming Language.

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This article is being improved by another user right now. Show me some love with the like buttons below Next How to change legend title in R using ggplot? How to Combine Multiple ggplot2 Plots in R? Campus Experiences. Solve Coding Problems. Modify the legend background color, key size and key width. Easy Normal Medium Hard Expert. Conclusion We introduce how to easily change a ggplot legend title, position and labels. What kind of Experience do you want to share? Key ggplot2 R functions Change legend title Change legend position Reverse the order of legend items Remove legend Change the legend font size, color and face Change legend background color, key size and width Rename legend labels and change the order of items Change legend colors manually Multiple guides: Remove and order legends Conclusion. You can suggest the changes for now and it will be under the article's discussion tab. Solve Coding Problems.

Start by creating a box plot using the ToothGrowth data set. Change the box plot fill color according to the grouping variable dose. The function labs can be used to easily update the legend title for a given aesthetic fill, color, size, shape, linetype, … :.

Reverse legend order. Share your thoughts in the comments. Enhance the article with your expertise. View More. Maximize your earnings for your published articles in Dev Scripter ! It is also possible to position the legend inside the plotting area. There is not a built-in way to remove the slashes, but it is possible to cover them up. Data Example of plot Change the legend position Change the legend title and text font styles Change the background color of the legend box Change the order of legend items Remove the plot legend Remove slashes in the legend of a bar plot guides : set or remove the legend for a specific aesthetic Default plot without guide specification Change the legend position for multiple guides Change the order for multiple guides Remove a legend for a particular aesthetic Infos. Change legend theme: background color, legend box border, font size and color. Plot labels at end of ggplot line graph in R.