How to change line width in ggplot2? Last Updated : 03 Mar, 2021 Comments Improve Suggest changes Like Article Like Report ggplot2 is a data visualization package for the statistical programming language R. This article discusses how can we change line width in ggplot2. For this, only the size parameter in the geom_line() function has to be initialized to the required value. Syntax: geom_line(mapping=NULL, data=NULL, stat="identity", position="identity",...) Approach Import moduleCreate data frameCreate plot with a lineDisplay plot Let us first draw a regular plot so that the difference is better understandable and apparent. Example: R library(ggplot2) data <- data.frame( name=c("A","B","C","D","E"), value=c(3,12,5,18,45) ) # For Create a simple line graph ggplot(data, aes(x=name, y=value, group=1)) + geom_line() Output: Simple line graph using ggplot2 Setting the required value to the size parameter of geom_line() will produce a line plot of the required width. Example: R library(ggplot2) data <- data.frame( name=c("A","B","C","D","E"), value=c(3,12,5,18,45) ) # For create line graph with change of size and color. ggplot(data, aes(x=name, y=value, group=1)) + geom_line(size=3, color="green") Output: Modified Line Graph using ggplot2    Comment More infoAdvertise with us Next Article How to change line width in ggplot2? E erkrutikpatel Follow Improve Article Tags : R Language R-ggplot Similar Reads How to change legend title in ggplot2 in R? In this article, we will see how to change the legend title using ggplot2 in R Programming. We will use ScatterPlot. For the Data of Scatter Plot, we will pick some 20 random values for the X and Y axis both using rnorm() function which can generate random normal values, and here we have one more p 3 min read How to change Colors in ggplot2 Line Plot in R ? A line graph is a chart that is used to display information in the form of series of data points. It utilizes points and lines to represent change over time. Line graphs are drawn by plotting different points on their X coordinates and Y coordinates, then by joining them together through a line from 2 min read How to change the legend shape using ggplot2 in R? In this article, we will discuss how to change only legend shape using ggplot2 in R programming language. Here ScatterPlot is used the same can be applied to any other plot. Syntax : sample(x, size, replace = TRUE) Parameters : x : either a vector of one or more values from which we want to choose t 3 min read Adding error bars to a line graph with ggplot2 in R ggplot2 is an R language plotting package that creates complex plots from data in a data frame. It describes what variables to plot, how they are displayed, and general visual properties. It can add error bars, crossbars, line range, point range in our graph. This article is solely dedicated to addi 3 min read Adding Partial Horizontal Lines with ggplot2 in R Visualizing data effectively often requires emphasizing specific aspects or values. In ggplot2, horizontal lines help highlight thresholds, averages, or other reference values. While geom_hline() allows adding full horizontal lines across the entire plot, there are situations where you may want to d 4 min read Like