# 
## Overview
The `curve()` function in `R` is part of the **`graphic` package**, which provides basic data visualization elements like box plots, bar plots, and so on. 

**`curve()`** is used to draw a curve for the equation specified in the arguments.
## Syntax

```r
curve(expr, to, from, col)
```

## Parameters
* **`expr`**: This is the expression to be curved.
* **`from`**: This is the start of the range to be evaluated for the expression.
* **`to`**: This is the end of the range to be evaluated for the expression. 
* **`col`**: This is to specify the color of the curve. This is an optional parameter.

> **Note**: Other graphical parameters like `xlable`, `ylabel`, `main`, and so on, can also be passed as parameters.

## Example 
 

 

f1 <- function(x) {
    sin(x) # Calculating Sine Value for the Plot.
    }

curve(f1, -4, 4, col ="red") # Specifing the range between -4, 4. 

testR

## Explanation
* Line 2: We define a function to calculate the sine value for the plot using `sin(x)`. We store this in `f1`. 
* Line 5: We make the function call to `curve`. Here, `f1` is passed as the expression, with a range from `-4` to `4`. The optional parameter `col` is set to `"red"`.  

chrome.tar.gz

How to use curve() in R

curve() in R draws a specified equation over a defined range. Setup includes expression, range, and optional color.