Get the Number of Levels of a Factor in R Programming – nlevels() Function

function in R Language is used to get the number of levels of a factor.**nlevels()**

Syntax:nlevels(x)

Parameters:x:Factor Object

**Example 1:**

`# R program to get the number` `# of levels of a factor` ` ` `# Creating a factor` `x <` `-` `gl(` `3` `, ` `2` `)` `x` ` ` `# Calling nlevels() function` `# to get the number of levels` `nlevels(x)` |

**Output:**

[1] 1 1 2 2 3 3 Levels: 1 2 3 [1] 3

**Example 2:**

`# R program to get the number` `# of levels of a factor` ` ` `# Creating a factor` `gender <` `-` `factor(c(` `"female"` `, ` `"male"` `, ` `"male"` `, ` `"female"` `)); ` `gender` ` ` `# Calling nlevels() function` `# to get the number of levels` `nlevels(gender)` |

**Output:**

[1] female male male female Levels: female male [1] 2