---
name: "nca.hpp"
section: "3"
platform: "linux"
package: "mlpack-doc"
version: "1.0.10-1"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/nca.hpp"
---

# nca.hpp(3)

## NAME

src/mlpack/methods/nca/nca.hpp -

## SYNOPSIS

### Classes

class **mlpack::nca::NCA\< MetricType, OptimizerType \>**\
 *An implementation of Neighborhood Components Analysis, both a linear dimensionality reduction technique and a distance learning technique.*

### Namespaces

 **mlpack**\
 *Linear algebra utility functions, generally performed on matrices or vectors.*   **mlpack::nca**\
 *Neighborhood Components Analysis.*

## Detailed Description

**Author:**

Ryan Curtin

Declaration of NCA class (Neighborhood Components Analysis).

This file is part of MLPACK 1.0.10.

MLPACK is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

MLPACK is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details (LICENSE.txt).

You should have received a copy of the GNU General Public License along with MLPACK. If not, see http://www.gnu.org/licenses/.

Definition in file **nca.hpp**.

## Author

Generated automatically by Doxygen for MLPACK from the source code.