最好的方法来获得一个Matlab< - > C ++接口 [英] Best way to get a Matlab <-> C++ interface

问题描述

我有一个C ++ Windows程序，我想在现有的Matlab程序中转换和可视化来自这个C ++应用程序的一些数据。

I have a C++ Windows Program and I want to convert and visualize some data from this C++ app in an existing Matlab Program.

目前我正在写数据将C ++应用程序转换为文件。同时，Matlab应用程序读取文件并处理数据。 （poll）它基本上可以工作，但是当数据负载变高时，我遇到性能问题。

Currently I am writing the data from the C++ app into files. At the same time the Matlab app reads the files and processes the data. (polling) It basically works but I am running in performance troubles when the data load gets to high.

在这些程序之间传输数据的最佳解决方案是什么？我在想一种消息队列或套接字接口。

What is the best solution to transfer data between this programs? I am thinking of a kind of message queue or socket interface.

推荐答案

使用Matlab API 将数据从C ++发送到Matlab，然后对其执行plot命令。
粗略地，执行以下操作 - 没有错误检查，但是gist是存在的：

Use the Matlab API to send your data from C++ to Matlab, then execute a plot command on it. Roughly, do the following -- there are no error checks, but the gist is there:

#include <engine.h>
//open the engine
Engine *m_engine;
m_engine = engOpen("\0");

//put our data
//pretend this is a 2 column, n row matrix, so we can do a 2D plot
mxArray* mx = mxCreateDoubleMatrix(mat->n_rows, mat->n_cols, mxREAL);
memcpy(mxGetPr(mx),some_data,data->n_elem*sizeof(double));
put("data",mx);
mxDestroyArray(mx);

//plot
engEvalString(m_engine, "plot(data(:,1),data(:,2),'-o')");

请记住，Matlab在专栏中工作，而C ++是行专业。

Just remember, Matlab works in column major, while C++ is row major.

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