---
title: "ClikaRT::ops::atleast_3d"
sidebar_label: "atleast_3d"
description: "input with leading size-1 dims prepended until rank >= 3 (see atleast_1d). Returns a view (no copy)."
---

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

## atleast\_3d() {#atleast_3d}

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[`Tensor`](../Tensor.md) **`atleast_3d`**([`Tensor`](../Tensor.md) `input`)

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`input` with leading size-1 dims prepended until rank \>= 3 (see [`atleast_1d`](./atleast_1d.md#atleast_1d)). Returns a view (no copy).

**Throws**

- `ClikaRT::Error`: when the input's dtype is not served for this operation (the machine-readable reason rides `code_name()`).

**Returns:** a view of `input` with rank \>= 3.

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Declared in `ClikaRT/compute/ops.h`, line 3176

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