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Zoom into ggplot2 Plot without Removing Data in R

  • Last Updated : 24 Oct, 2021

In this article, we will discuss how to zoom into the ggplot2 plot without removing data using ggplot2 package in the R programming language. The approaches to the zoom into ggplot2 plot without removing data are as follows:

  • Zoom in to ggplot2 plot without Removing data using ylim()/xlim() function
  • Zoom in to ggplot2 plot without Removing data using coord_cartesian() function

Method 1: Using ylim()/xlim() function

ylim()/xlim() function: Convenience function to set the limits of the y axis/x-axis.

Syntax:

ylim(...)
xlim(...)

Parameters:

  • …: if numeric, will create a continuous scale, if factor or character, will create a discrete scale.

Example:

In this, example, we will be using xlim() function to get the zoom into view of the ggplot2 bar plot of the given data without removing any initial data in the R programming language. 

R




# load the packages
library("ggplot2")
  
# create the dataframe with letters and numbers
gfg < -data.frame(
    x=c('A', 'B', 'C', 'D', 'E', 'F'),
    y=c(4, 6, 2, 9, 7, 3))
  
# plot the given data
# with A,B and C as titles to the bars
plot < -ggplot(gfg, aes(x, y, fill=x)) +
geom_bar(stat="identity")
plot+xlim('A', 'B', 'C')

Output:

Method 2: Using coord_cartesian() function

The Cartesian coordinate system is the most familiar, and common, type of coordinate system. Setting limits on the coordinate system will zoom the plot (like you’re looking at it with a magnifying glass), and will not change the underlying data like setting limits on a scale will.

Syntax:

coord_cartesian( xlim = NULL, ylim = NULL,expand = TRUE, default = FALSE, clip = “on”)

Parameters:

  • xlim, ylim: Limits for the x and y axes.
  • expand: If TRUE, the default, adds a small expansion factor to the limits to ensure that data and axes don’t overlap.
  • default: Is this the default coordinate system
  • clip: Should drawing be clipped to the extent of the plot panel?

Example:

In this, example, we will be using the coord_cartesian() function with ylim() function to get the zoom into view of the ggplot2 bar plot of the given data without removing any initial data in the R programming language. 

R




# load the package
library("ggplot2")
  
# create the dataframe with letters
# and numbers
gfg < -data.frame(
    x=c('A', 'B', 'C', 'D', 'E', 'F'),
    y=c(4, 6, 2, 9, 7, 3))
  
# plot the catrtesian bar
plot < -ggplot(gfg, aes(x, y, fill=x)) +
geom_bar(stat="identity")
plot+coord_cartesian(ylim=c(5, 7))

Output:


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