java - 使用 javaoctave 处理断管过程

Question

嗨，我正在使用 javaoctave 包与我的计算机上的 Octave 桥接以执行一些计算。但是我在编译的时候遇到了如下错误:

error: save: Unrecognized option '-'
Exception in thread "main" dk.ange.octave.exception.OctaveIOException: IOException during close
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at dk.ange.octave.exec.OctaveExec.reInstantiateException(OctaveExec.java:184)
    at dk.ange.octave.exec.OctaveExec.getFromFuture(OctaveExec.java:165)
    at dk.ange.octave.exec.OctaveExec.eval(OctaveExec.java:142)
    at dk.ange.octave.io.OctaveIO.get(OctaveIO.java:75)
    at dk.ange.octave.OctaveEngine.get(OctaveEngine.java:161)
    at dk.ange.octave.OctaveEngine.get(OctaveEngine.java:176)
    at learn.capability.CapabilityMeanVarianceEquation.learnCapabilities(CapabilityMeanVarianceEquation.java:214)
    at learn.graph.SimulatedAnnealingLearner.learnSynergyGraph(SimulatedAnnealingLearner.java:69)
    at parse.basketball.runner.GetPlayerFrequency.learnSynergyGraph(GetPlayerFrequency.java:112)
    at parse.basketball.runner.GetPlayerFrequency.main(GetPlayerFrequency.java:96)
Caused by: dk.ange.octave.exception.OctaveIOException: IOException during close
    at dk.ange.octave.exec.OctaveReaderCallable.call(OctaveReaderCallable.java:65)
    at dk.ange.octave.exec.OctaveReaderCallable.call(OctaveReaderCallable.java:28)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:695)
Caused by: java.io.IOException: Pipe to octave-process broken
    at dk.ange.octave.exec.OctaveExecuteReader.read(OctaveExecuteReader.java:68)
    at java.io.Reader.read(Reader.java:123)
    at dk.ange.octave.exec.OctaveExecuteReader.close(OctaveExecuteReader.java:96)
    at dk.ange.octave.exec.OctaveReaderCallable.call(OctaveReaderCallable.java:61)
    ... 6 more

我不确定我是如何遇到这个错误的。不过，我仔细检查了我的输入，所以我认为这没有任何问题。我使用的程序之前已经成功运行过。

希望有人帮忙，谢谢!

Answer 1

这与某些 Octave 版本中存在的“错误”有关，其中不考虑“保存”命令的“-”选项。这可能在 Octave 的更高版本中得到修复，但在此之前您可以像这样修改 JavaOctave:

在DataReadFunctor.doReads(final Reader reader)中，注释掉以下几行:

//        final String createByOctaveLine = readerReadLine(bufferedReader);
//        if (createByOctaveLine == null || !createByOctaveLine.startsWith("# Created by Octave")) {
//            throw new OctaveParseException("Not created by Octave?: '" + createByOctaveLine + "'");
//        }

在 OctaveIO.get(final String name) 中，编辑以下行:

final WriteFunctor writeFunctor = new ReaderWriteFunctor(new StringReader("save -text - " + name));

对此:

final WriteFunctor writeFunctor = new ReaderWriteFunctor(new StringReader("save -text /dev/stdout " + name));

这些更改应该可以解决该问题，或者至少让您朝着正确的方向前进，但我不建议将其作为补丁，因为该错误实际上存在于 Octave 的某些版本中(“保存”的文档确实指出了这一点) '-' 是输出到终端而不是文件的有效选项)