# How to Plot an Equation in R (With Examples)

You can use the following basic syntax to plot an equation or function in R:

Method 1: Use Base R

```curve(2*x^2+5, from=1, to=50, , xlab="x", ylab="y")
```

Method 2: Use ggplot2

```library(ggplot2)

#define equation
my_equation <- function(x){2*x^2+5}

#plot equation
ggplot(data.frame(x=c(1, 50)), aes(x=x)) +
stat_function(fun=my_equation)
```

Both of these particular examples plot the equation y = 2x2 + 5.

The following examples show how to use each method in practice.

## Example 1: Plot Equation in Base R

Suppose you’d like to plot the following equation:

y = 2x2 + 5

You can use the following syntax in base R to do so:

`curve(2*x^2+5, from=1, to=50, , xlab="x", ylab="y")`

This produces the following plot: If you’d like to plot points instead, simply specify type=”p” in the curve() function:

`curve(2*x^2+5, from=1, to=50, , xlab="x", ylab="y", type="p")`

This produces the following plot: ## Example 2: Plot Equation in ggplot2

Suppose you’d like to plot the following equation:

y = 2x2 + 5

You can use the following syntax in ggplot2 to do so:

```library(ggplot2)

#define equation
my_equation <- function(x){2*x^2+5}

#plot equation
ggplot(data.frame(x=c(1, 50)), aes(x=x)) +
stat_function(fun=my_equation)```

This produces the following plot: Notice that this plot matches the one we created in the previous example in base R.

Note: To plot a different equation, simply change the values defined for the my_equation variable.