Ggplot change legend title

You can also remove all the legends in a graph, using ggplot change legend title. 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 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.

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.

Plotting multiple time series on the same plot using ggplot in R. In the default setting of ggplot2, the legend is placed on the right of the plot.

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. To change the legend title using this method, simply provide the required title as the value to its name attribute. Labs function is used to modify axis, labels, etc. It can be used to change the legend title by providing the appropriate title name to col attribute.

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. The R code below creates a scatter plot.

Ggplot change legend title

If you want to add a legend to a ggplot2 chart you will need to pass a categorical or numerical variable to color , fill , shape or alpha inside aes. Depending on which argument you use to pass the data and your specific case the output will be different. Passing the categorical variable to color inside aes the data will be plotted based on groups and an automatic legend will you up. You can pass a categorical or a numerical variable. If the plot you are creating allows adding a fill color you can use the fill argument inside aes , so the boxes of the legend will be colored. In the previous scenario you can also use both arguments fill and color , so the legend will be a box filled with the correspoding color and the border will also have the corresponding color of the group. If you want to change the fill or border colors of the chart and automatically of the legend take a look to other tutorials, such as the density plot by group tutorial. There are several ways to change the title of the legend of your plot. Note that the chosen option will depend on your chart type and your preferences. The second option is passing the new title to the fill or color argument of the labs function.

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Contribute your expertise and make a difference in the GeeksforGeeks portal. Easy Normal Medium Hard Expert. Hire With Us. Engineering Exam Experiences. Please Login to comment Create DataFrame for plotting. How to Plot a Smooth Line using ggplot2 in R? Also note the use of backticks instead of quotes. Maximize your earnings for your published articles in Dev Scripter ! This R graphics tutorial shows how to customize a ggplot legend. How to change legend title in ggplot2 in R? We use sample function to generate data for Users vector. This article is being improved by another user right now.

Start by creating a box plot using the ToothGrowth data set.

Work Experiences. Control the legend colors manually by specifying custom color values. How to Change Position of ggplot Title in R? Make sure that the variable dose is converted as a factor variable using the above R script. Please go through our recently updated Improvement Guidelines before submitting any improvements. Suggest changes. We use cookies to ensure you have the best browsing experience on our website. Reduce size of legend area using ggplot in R. The other method, with scales, is generally a better way to do this. Adding table within the plotting region of a ggplot in R. How to change legend title in ggplot2 in R?