Change Axis Scales in ggplot2
To change the axis scales on a plot made using the ggplot2 package in the R Language, we can use the xlim() and ylim() functions. These functions can be used along with the ggplot() function by adding them using plus(+) symbol The xlim() and ylim() functions are convenience functions that set the limit of the x-axis and y-axis respectively. This function takes a vector as an argument which contains the values of lower axis limit and higher axis limit.
Syntax:
ggplot() + xlim() +ylim()
where,
xlim(): takes two values as input that are lower x-axis limit and higher x-axis limit.
ylim(): takes two values as input that are lower y-axis limit and higher y-axis limit.
Example:
Here, is a basic example of a ggplot2 plot where plot axis limits are set from 0 to 2 for the x-axis and from 18 to 20 for the y-axis.
R
# load library ggplot2 library(ggplot2) # create sample data frame sample_data <- data.frame(x=rnorm(100), y=rnorm(100)+20) # create plot with custom axis scales ggplot(sample_data, aes(x=x, y=y))+ geom_point()+ xlim(0,2)+ ylim(18,20) |
Output:
Output
Convert axis scales to log scale:
To convert the axis scale log scale in the R plot made using the ggplot2 package, we use the scale_y_continuous() and scale_y_continuous() functions along with the trans argument for the x-axis and the y-axis transformation respectively. The trans argument takes a logarithmic identifier as an argument and then converts the axis into the given log scale alternative. This helps us in visualizing the skew data frames.
Syntax: plot + scale_x_continuous( trans ) + scale_y_continuous( trans )
where, trans: determines the exact log scale for transformation
Example: Basic example of a ggplot2 plot where the x-axis has been converted to its log scale alternative.
R
# load library ggplot2 library(ggplot2) # create sample data frame sample_data <- data.frame(x=rnorm(100), y=rnorm(100)+20) # create plot with log x-axis sclae ggplot(sample_data, aes(x=x, y=y))+ geom_point()+ scale_x_continuous( trans= 'log10') |
Output:
Output
How to Change Axis Scales in R Plots?
In this article, we will learn how to change Axis Scales in the R Programming Language.