---
title: "ClikaRT::ops::rfft"
sidebar_label: "rfft"
description: "One-sided real FFT along the last axis: real [..., n] → interleaved (re, im) pairs [..., n_fft/2 + 1, 2]. n_fft defaults to the last axis's extent; normalized scales the spectrum by 1/sqrt(n_fft)."
---

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<span class="api-kind api-kind--function">function</span>

## rfft() {#rfft}

<div class="api-signature">

[`Tensor`](../Tensor.md) **`rfft`**(<br />
&nbsp;&nbsp;&nbsp;&nbsp;[`Tensor`](../Tensor.md) `input`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;`std::optional<std::int64_t>` `n_fft` `=` `std::nullopt`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;`bool` `normalized` `=` `false`<br />
)

</div>

One-sided real FFT along the last axis: real `[..., n]` → interleaved (re, im) pairs `[..., n_fft/2 + 1, 2]`. `n_fft` defaults to the last axis's extent; `normalized` scales the spectrum by `1/sqrt(n_fft)`.

<div class="api-declared">

Declared in `ClikaRT/compute/ops.h`, line 3301

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