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wtf is matlabwrapper?

karpathy/matlabwrapper — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2012-08-27

★ 87C++Audience · researcherComplexity · 3/5DormantSetup · hard

TL;DR

MatlabWrapper is a C++ library that lets you call Matlab code and functions directly from a C++ program, sending data over and pulling results back without leaving your codebase.

Mindmap

mindmap
  root((matlabwrapper))
    What it does
      Bridges C++ and Matlab
      Sends and receives data
      Runs Matlab commands
    Use Cases
      Reuse trusted Matlab code
      Run k-means from C++
      Interactive debugging shell
    Audience
      Researchers
      Engineers
    Tech Stack
      C++
      Matlab
      Eigen

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Send an Eigen matrix from C++ to Matlab, run a built-in function like k-means clustering, and pull the results back into your program.

REASON 2

Pause a running C++ program mid-execution to drop into an interactive Matlab shell for exploring data with plots.

REASON 3

Integrate existing trusted Matlab algorithms into a larger C++ application without reimplementing them.

REASON 4

Debug a numerical pipeline by inspecting intermediate matrices interactively in Matlab before resuming C++ execution.

What's in the stack?

C++MatlabEigen

How it stacks up

karpathy/matlabwrapperpeng-zhihui/faceapp-arduino2dom/keypad
Stars878889
LanguageC++C++C++
Last pushed2012-08-272017-03-17—
MaintenanceDormantDormant—
Setup difficultyhardmoderatehard
Complexity3/52/54/5
Audienceresearchervibe coderdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · hard Time to first run · 1h+

Requires both Matlab and the Eigen library installed, with extra configuration to get Matlab Engine talking to C++.

No license information was stated in the explanation.

Yoink these prompts

Prompt 1
I have a C++ program using Eigen matrices and want to run Matlab's k-means clustering on the data. Show me how to send the matrix to Matlab and get the results back using matlabwrapper.
Prompt 2
Explain how matlabwrapper's interactive mode works so I can pause my C++ program and explore my data live in Matlab.
Prompt 3
Walk me through installing matlabwrapper alongside Matlab and Eigen, including common configuration issues connecting the Matlab Engine to C++.
Prompt 4
I have an existing Matlab algorithm I trust. Help me wrap it with matlabwrapper so I can call it from a new C++ application without rewriting it.

Frequently asked questions

wtf is matlabwrapper?

MatlabWrapper is a C++ library that lets you call Matlab code and functions directly from a C++ program, sending data over and pulling results back without leaving your codebase.

What language is matlabwrapper written in?

Mainly C++. The stack also includes C++, Matlab, Eigen.

Is matlabwrapper actively maintained?

Dormant — no commits in 2+ years (last push 2012-08-27).

What license does matlabwrapper use?

No license information was stated in the explanation.

How hard is matlabwrapper to set up?

Setup difficulty is rated hard, with roughly 1h+ to a first successful run.

Who is matlabwrapper for?

Mainly researcher.

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