# Parallel Computing Fundamentals

Parallel computing can help you to solve big computing problems in different ways. MATLAB^{®} and Parallel Computing Toolbox™ provide an interactive programming environment to help tackle your
computing tasks. If your code runs too slowly, you can profile it, vectorize it, and
use built-in MATLAB parallel computing support. Then you can try to accelerate your code
by using `parfor`

on multiple MATLAB workers in a parallel pool. If you have big data, you can scale up
using distributed arrays or `datastore`

. You can also execute a
task without waiting for it to complete, using `parfeval`

, so
that you can carry on with other tasks. You can use different types of hardware to
solve your parallel computing problems, including desktop computers, GPUs, clusters,
and clouds. To get started, see Quick Start Parallel Computing in MATLAB.

## Functions

## Topics

### Basics

**Choose a Parallel Computing Solution**

Discover the most important functionalities offered by MATLAB and Parallel Computing Toolbox to solve your parallel computing problem.**Parallel Language Decision Tables**

Discover example use cases for common parallel computing language features.**Quick Start Parallel Computing in MATLAB**

Learn about parallel computing in MATLAB and Parallel Computing Toolbox.**Run MATLAB Functions with Automatic Parallel Support**

Take advantage of parallel computing resources without requiring any extra coding.**Interactively Run Loops in Parallel Using parfor**

Convert a`for`

-loop into a scalable`parfor`

-loop.**Choose How to Manage Data in Parallel Computing**

Determine the data management approach that meets your parallel computing requirements.**Plot During Parameter Sweep with parfor**

Perform a parameter sweep in parallel and plot progress during parallel computations.**Scale Up from Desktop to Cluster**

Develop your parallel MATLAB® code on your local machine and scale up to a cluster.**Run Batch Parallel Jobs**

Use batch to offload work from your MATLAB session to run in the background.**Process Big Data in the Cloud**

This example shows how to access a large data set in the cloud and process it in a cloud cluster using MATLAB® capabilities for big data.**Evaluate Functions in the Background Using parfeval**

Break out of a loop early and collect results as they become available.**Run MATLAB Functions on a GPU**

Supply a`gpuArray`

argument to automatically run functions on a GPU.**Train Network in the Cloud Using Automatic Parallel Support (Deep Learning Toolbox)**

This example shows how to train a convolutional neural network using MATLAB automatic support for parallel training.

### Learn More

**What Is Parallel Computing?**

Learn about MATLAB and Parallel Computing Toolbox.**Run Code on Parallel Pools**

Learn about starting and stopping parallel pools, pool size, and cluster selection.**Choose Between Thread-Based and Process-Based Environments**

With Parallel Computing Toolbox, you can run your parallel code in different parallel environments, such as thread-based or process-based environments.**Run MATLAB Functions in Thread-Based Environment**

Check support for MATLAB functions that you want to run in the background.**Set Environment Variables on Workers**

Copy system environment variables from the client to workers in a cluster.**Write Portable Parallel Code**

Write parallel code that can use parallel resources if you have Parallel Computing Toolbox and that still runs if you do not have Parallel Computing Toolbox.