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# Compute the value of Quantile Function over Studentized Distribution in R Programming – qtukey() Function

• Last Updated : 25 Jun, 2020

`qtukey()` function in R Language is used to compute the value of Studentized Range Quantile Function over a sequence of Numeric Values.

Syntax: qtukey(x, nmeans, df)

Parameters:
x: Numeric Vector
nmeans: Number of means
df: Degree of Freedom

Example 1:

 `# R Program to compute the value of``# Quantile Function Studentized Range`` ` `# Creating a sequence of Numeric values``x <``-` `seq(``0``, ``1``, by ``=` `0.1``)`` ` `# Calling qtukey() Function``y <``-` `qtukey(x, nmeans ``=` `7``, df ``=` `5``)``y`

Output:

``` [1] 0.000000 1.574255 1.933986 2.237255 2.531898 2.842588 3.193850 3.623645
[9] 4.214094 5.238196      Inf
```

Example 2:

 `# R Program to compute the value of``# Quantile Function Studentized Range`` ` `# Creating a sequence of Numeric values``x <``-` `seq(``0``, ``1``, by ``=` `0.02``)`` ` `# Calling qtukey() Function``y <``-` `qtukey(x, nmeans ``=` `7``, df ``=` `5``)`` ` `# Plot a graph``plot(y)`

Output:

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