在MATLAB外部运行MATLAB函数时MatlabControl中的异常

Question

我需要帮助通过MatlabControl在Java和MATLAB之间建立连接。

首先，我想在演练中测试代码，但每次我都有相同的例外：

myfunc.m：

function myfunc()
    disp('hello from MYFUNC')
end

爪哇：

class ShowImage {

 public static void main(String[] args)
        throws MatlabConnectionException, MatlabInvocationException
    {
         // create proxy
         MatlabProxyFactoryOptions options =
            new MatlabProxyFactoryOptions.Builder()
                .setUsePreviouslyControlledSession(true)
                .build();
        MatlabProxyFactory factory = new MatlabProxyFactory(options);
        MatlabProxy proxy = factory.getProxy();

        // call builtin function
        proxy.eval("disp('hello world')");

        // call user-defined function (must be on the path)
        proxy.eval("addpath('E:\\vm')");
        proxy.feval("myfunc");
        proxy.eval("rmpath('E:\\vm)");

        // close connection
        proxy.disconnect();

}}

这里有例外：

Exception in thread "main" matlabcontrol.MatlabConnectionException: Could not launch MATLAB. Command: [matlab, -r, javaaddpath 'C:\Users\walaa\Desktop\matlabcontrol-4.0.0.jar'; matlabcontrol.MatlabClassLoaderHelper.configureClassLoading(); javarmpath 'C:\Users\walaa\Desktop\matlabcontrol-4.0.0.jar'; matlabcontrol.MatlabConnector.connectFromMatlab('PROXY_RECEIVER_42dd44d9-815e-41ad-bec9-e469718b5710', 2100);]
    at matlabcontrol.RemoteMatlabProxyFactory.createProcess(RemoteMatlabProxyFactory.java:305)
    at matlabcontrol.RemoteMatlabProxyFactory.requestProxy(RemoteMatlabProxyFactory.java:116)
    at matlabcontrol.RemoteMatlabProxyFactory.getProxy(RemoteMatlabProxyFactory.java:134)
    at matlabcontrol.MatlabProxyFactory.getProxy(MatlabProxyFactory.java:81)
    at ShowImage.main(ShowImage.java:19)
Caused by: java.io.IOException: Cannot run program "matlab": CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessBuilder.start(Unknown Source)
    at matlabcontrol.RemoteMatlabProxyFactory.createProcess(RemoteMatlabProxyFactory.java:292)
    ... 4 more
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessImpl.create(Native Method)
    at java.lang.ProcessImpl.<init>(Unknown Source)
    at java.lang.ProcessImpl.start(Unknown Source)
    ... 6 more

我不知道有什么问题，任何帮助都会受到赞赏!!

Answer 1

我假设您使用的是here中的示例。显然它已经过测试和工作，只需确保MATLAB在Windows路径上（错误消息表明它无法找到程序“matlab.exe”）