*25*

You can use the following basic syntax to change axis intervals on a plot in base R:

#create plot with no axis intervals plot(x, y, xaxt='n', yaxt='n') #specifty x-axis interval axis(side=1, at=c(1, 5, 10, 15)) #specify y-axis interval axis(side=2, at=seq(1, 100, by=10))

The following examples show how to use this syntax in practice.

**Example 1: Specify Axis Intervals Using Individual Values**

The following code shows how to modify the x-axis and y-axis intervals in a plot in base R using the **c()** function:

#define data x #create scatterplot plot(x, y, col='steelblue', pch=19, xaxt='n', yaxt='n') #modify x-axis and y-axis intervals axis(side=1, at=c(1, 5, 10, 15)) axis(side=2, at=c(1, 12.5, 25))

Notice that the only values shown along the x-axis and y-axis are the specific values that we specified.

**Example 2: Specify Axis Intervals Using a Sequence of Values**

The following code shows how to modify the x-axis and y-axis intervals in a plot in base R using the **seq()** function:

#define data x #create scatterplot plot(x, y, col='steelblue', pch=19, xaxt='n', yaxt='n') #modify x-axis and y-axis intervals axis(side=1, at=seq(5, 15, by=5)) axis(side=2, at=seq(0, 25, by=5))

Notice that the only values shown along the x-axis and y-axis are the values we specified using the **seq()** function.

**Example 3: Specify Axis Intervals Using a Range of Values**

The following code shows how to modify the x-axis interval in a plot in base R using the **:** function:

#define data x #create scatterplot plot(x, y, col='steelblue', pch=19, xaxt='n') #modify x-axis interval axis(side=1, at=1:15)

Notice that base R automatically produced y-axis interval values and then used the range of x-axis interval values that we specified.

**Additional Resources**

The following tutorials explain how to perform other common plotting operations in R:

How to Set Axis Limits in R

How to Change Axis Scales in R

How to Draw a Legend Outside of a Plot in R