# invStudent {#invstudent}

**Parent topic:**[Functions](../../Functions/category.md)

## Syntax {#syntax}

`invStudent(df, X)`

## Arguments {#arguments}

**df** is a positive floating number indicating the degree of freedom of a Student's t-distribution.

**X** is a floating scalar or vector between 0 and 1.

## Details {#details}

Return the value of a Student's t inverse cumulative distribution function.

## Examples {#examples}

```
invStudent(1, [0.15, 0.25, 0.35]);
// output: [-1.962611, -1, -0.509525]

invStudent(1, [0.1, 0.3, 0.5, 0.7, 0.9]);
// output: [-3.077684, -0.726543, 0, 0.726543, 3.077684]
```

