nthroot (MATLAB Functions)

Real nth root of real numbers

Syntax

```
y = nthroot(X, n)
```

Description

y = nthroot(X, n) returns the real nth root of the elements of X. Both X and n must be real and n must be a scalar. If X has negative entries, n must be an odd integer.

Example

```
nthroot(-2, 3)
```

returns the real cube root of -2.

```
ans =

   -1.2599
```

By comparison,

```
(-2)^(1/3)
```

returns a complex cube root of -2.

```
ans =

   0.6300 + 1.0911i
```

See Also

power

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