# 
## Overview
We obtain a vector of colors from a vector of gray levels using the **`gray()`** function in the R programming language.
## Syntax
```
gray(level, alpha = NULL)
```
## Parameter value
The `gray()` function takes the following parameter values:
* **`level`** (required): This represents the vector which has the desired gray levels between `0` and `1`. It's worth noting that `0` indicates `black` while `1` indicates `white`.
* **`alpha`** (optional): This is an optional value indicating the opacity, if specifed.
## Return value
The `gray()` function returns a vector of the color having the same length as the input parameter `level`.
## Example


# creating a level parameter 
mylevel <- c( 0.1, 0.5, 1.0 )

# implementing the gray() function
gray(mylevel, alpha=TRUE)

## Explanation 
In the code above, we see the following:  
* **Line 2**: We create a vector object `mylevel` representing the `level` parameter.
* **Line 5**: We apply the `gray()` function on the vector object and return the result to the console.


What is the gray() function in R?

Converts a vector of gray levels (0 to 1) to colors using R's gray() function. Optional opacity.