OpenViBE forum

I have set up the classifier so that it creates the configuration in the trainer and accesses it in the processor but it says that it is unable to get the root node from the file I created in the trainer. Does this file need to be preexisting? I currently have it writing to a file I did not create before hand and am wondering if this is the problem.

Hi,

usually the classifier is created in one scenario and then used in another after the classifier has been saved by the first one. You can try to load the saved classifier with a text editor and see if it looks meaningful (can copy paste it here if you're not sure). Also, check that the classifier tutorials bundled with openvibe work (pick them from box-tutorials/, copy to somewhere with read access and try to run.


Hope this helps,
Jussi

I am not sure if the classifier is meaningful so I copied and pasted it below. I did run the example scenarios and they worked. Thank you for your help.

<OpenViBE-Scenario>
<Creator>OpenViBE</Creator>
<CreatorVersion>1.3.0</CreatorVersion>
<Boxes>
<Box>
<Identifier>(0x0000104d, 0x00004d02)</Identifier>
<Name>Confusion Matrix</Name>
<AlgorithmClassIdentifier>(0x1ab625da, 0x3b2502ce)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Targets</Name>
</Input>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Classification results</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x544a003e, 0x6dcba5f6)</TypeIdentifier>
<Name>Confusion Matrix</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Percentages</Name>
<DefaultValue>true</DefaultValue>
<Value>true</Value>
<Modifiability>false</Modifiability>
</Setting>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Sums</Name>
<DefaultValue>false</DefaultValue>
<Value>false</Value>
<Modifiability>false</Modifiability>
</Setting>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>Class 1</Name>
<DefaultValue>OVTK_StimulationId_Label_00</DefaultValue>
<Value>OVTK_StimulationId_Label_00</Value>
<Modifiability>false</Modifiability>
</Setting>
<Setting>
<TypeIdentifier>(0x2c132d6e, 0x44ab0d97)</TypeIdentifier>
<Name>Class 2</Name>
<DefaultValue>OVTK_StimulationId_Label_01</DefaultValue>
<Value>OVTK_StimulationId_Label_01</Value>
<Modifiability>false</Modifiability>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>272.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>34</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>656.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0x05cf579a, 0x80d8b480)</Value>
</Attribute>
<Attribute>
<Identifier>(0x61d11811, 0x71e65362)</Identifier>
<Value></Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>105</Value>
</Attribute>
<Attribute>
<Identifier>(0xc46b3d00, 0x3e0454e1)</Identifier>
<Value>(0x00000000, 0x0008743e)</Value>
</Attribute>
<Attribute>
<Identifier>(0xc73e83ec, 0xf855c5bc)</Identifier>
<Value>false</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>4</Value>
</Attribute>
<Attribute>
<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>2</Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x0000210e, 0x000063d9)</Identifier>
<Name>Classifier processor</Name>
<AlgorithmClassIdentifier>(0x5fe23d17, 0x95b0452c)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x17341935, 0x152ff448)</TypeIdentifier>
<Name>Features</Name>
</Input>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Commands</Name>
</Input>
</Inputs>
<Outputs>
<Output>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Labels</Name>
</Output>
<Output>
<TypeIdentifier>(0x544a003e, 0x6dcba5f6)</TypeIdentifier>
<Name>Hyperplane distance</Name>
</Output>
<Output>
<TypeIdentifier>(0x544a003e, 0x6dcba5f6)</TypeIdentifier>
<Name>Probability values</Name>
</Output>
</Outputs>
<Settings>
<Setting>
<TypeIdentifier>(0x330306dd, 0x74a95f98)</TypeIdentifier>
<Name>Filename to load configuration from</Name>
<DefaultValue></DefaultValue>
<Value>C:/Users/Vikram/Desktop/10th Grade/Science Fair/firstone</Value>
<Modifiability>false</Modifiability>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>112.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>23</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>592.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0xa6c8e548, 0x9e3e405b)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>120</Value>
</Attribute>
<Attribute>
<Identifier>(0xc46b3d00, 0x3e0454e1)</Identifier>
<Value>(0x00000000, 0x00069e7f)</Value>
</Attribute>
<Attribute>
<Identifier>(0xc73e83ec, 0xf855c5bc)</Identifier>
<Value>false</Value>
</Attribute>
<Attribute>
<Identifier>(0xc80ce8af, 0xf699f813)</Identifier>
<Value>3</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>2</Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x00004722, 0x00006d8c)</Identifier>
<Name>Matrix Display</Name>
<AlgorithmClassIdentifier>(0x54f0796d, 0x3ede2cc0)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x544a003e, 0x6dcba5f6)</TypeIdentifier>
<Name>Matrix</Name>
</Input>
</Inputs>
<Settings>
<Setting>
<TypeIdentifier>(0x3d3c7c7f, 0xef0e7129)</TypeIdentifier>
<Name>Color gradient</Name>
<DefaultValue>0:2,36,58; 50:100,100,100; 100:83,17,20</DefaultValue>
<Value>0:2,36,58; 50:100,100,100; 100:83,17,20</Value>
<Modifiability>false</Modifiability>
</Setting>
<Setting>
<TypeIdentifier>(0x007deef9, 0x2f3e95c6)</TypeIdentifier>
<Name>Steps</Name>
<DefaultValue>100</DefaultValue>
<Value>100</Value>
<Modifiability>false</Modifiability>
</Setting>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Symetric min/max</Name>
<DefaultValue>false</DefaultValue>
<Value>false</Value>
<Modifiability>false</Modifiability>
</Setting>
<Setting>
<TypeIdentifier>(0x2cdb2f0b, 0x12f231ea)</TypeIdentifier>
<Name>Real time min/max</Name>
<DefaultValue>false</DefaultValue>
<Value>false</Value>
<Modifiability>false</Modifiability>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>384.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>23</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>640.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0x4ff49bdb, 0x9dcf6788)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>91</Value>
</Attribute>
<Attribute>
<Identifier>(0xc46b3d00, 0x3e0454e1)</Identifier>
<Value>(0x00000000, 0x000bdcb0)</Value>
</Attribute>
<Attribute>
<Identifier>(0xc73e83ec, 0xf855c5bc)</Identifier>
<Value>false</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>4</Value>
</Attribute>
<Attribute>
<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>1</Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x00004c4f, 0x000019e4)</Identifier>
<Name>General statistics generator</Name>
<AlgorithmClassIdentifier>(0x83eda40b, 0x425fbffe)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x5ba36127, 0x195feae1)</TypeIdentifier>
<Name>Signal</Name>
</Input>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Stimulations</Name>
</Input>
</Inputs>
<Settings>
<Setting>
<TypeIdentifier>(0x330306dd, 0x74a95f98)</TypeIdentifier>
<Name>Filename for saving</Name>
<DefaultValue>${Path_UserData}/statistics-dump.xml</DefaultValue>
<Value>${Path_UserData}/statistics-dump.xml</Value>
<Modifiability>false</Modifiability>
</Setting>
</Settings>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>256.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>45</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>320.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0xf6674389, 0x42f4fe25)</Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>169</Value>
</Attribute>
<Attribute>
<Identifier>(0xc46b3d00, 0x3e0454e1)</Identifier>
<Value>(0x00000000, 0x0013a92e)</Value>
</Attribute>
<Attribute>
<Identifier>(0xc67a01dc, 0x28ce06c1)</Identifier>
<Value></Value>
</Attribute>
<Attribute>
<Identifier>(0xc73e83ec, 0xf855c5bc)</Identifier>
<Value>false</Value>
</Attribute>
<Attribute>
<Identifier>(0xce18836a, 0x9c0eb403)</Identifier>
<Value>1</Value>
</Attribute>
<Attribute>
<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>2</Value>
</Attribute>
<Attribute>
<Identifier>(0xf191c1c8, 0xa0123976)</Identifier>
<Value></Value>
</Attribute>
</Attributes>
</Box>
<Box>
<Identifier>(0x00005fad, 0x00003802)</Identifier>
<Name>Classifier Accuracy Measure</Name>
<AlgorithmClassIdentifier>(0x48395ce7, 0x17d62550)</AlgorithmClassIdentifier>
<Inputs>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Targets</Name>
</Input>
<Input>
<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
<Name>Classifier 1</Name>
</Input>
</Inputs>
<Attributes>
<Attribute>
<Identifier>(0x1fa7a38f, 0x54edbe0b)</Identifier>
<Value>272.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x1fa963f5, 0x1a638cd4)</Identifier>
<Value>34</Value>
</Attribute>
<Attribute>
<Identifier>(0x207c9054, 0x3c841b63)</Identifier>
<Value>496.000000</Value>
</Attribute>
<Attribute>
<Identifier>(0x4e7b798a, 0x183beafb)</Identifier>
<Value>(0x8942cf6b, 0x91b31641)</Value>
</Attribute>
<Attribute>
<Identifier>(0x527ad68d, 0x16d746a0)</Identifier>
<Value></Value>
</Attribute>
<Attribute>
<Identifier>(0xad100179, 0xa3c984ab)</Identifier>
<Value>144</Value>
</Attribute>
<Attribute>
<Identifier>(0xc46b3d00, 0x3e0454e1)</Identifier>
<Value>(0x00000000, 0x00092cc3)</Value>
</Attribute>
<Attribute>
<Identifier>(0xc73e83ec, 0xf855c5bc)</Identifier>
<Value>false</Value>
</Attribute>
<Attribute>
<Identifier>(0xcfad85b0, 0x7c6d841c)</Identifier>
<Value>2</Value>
</Attribute>
<Attribute>
<Identifier>(0xfba64161, 0x65304e21)</Identifier>
<Value></Value>
</Attribute>
</Attributes>
</Box>
</Boxes>
<Links>
<Link>
<Identifier>(0x00000f8c, 0x00000325)</Identifier>
<Source>
<BoxIdentifier>(0x0000210e, 0x000063d9)</BoxIdentifier>
<BoxOutputIndex>0</BoxOutputIndex>
</Source>
<Target>
<BoxIdentifier>(0x0000104d, 0x00004d02)</BoxIdentifier>
<BoxInputIndex>0</BoxInputIndex>
</Target>
<Attributes>
<Attribute>
<Identifier>(0x1b32c44c, 0x1905e0e9)</Identifier>
<Value>130</Value>
</Attribute>
<Attribute>
<Identifier>(0x358ae8b5, 0x0f8bacd1)</Identifier>
<Value>577</Value>
</Attribute>
<Attribute>
<Identifier>(0x3f0a3b27, 0x570913d2)</Identifier>
<Value>250</Value>
</Attribute>
<Attribute>
<Identifier>(0x6267b5c5, 0x676e3e42)</Identifier>
<Value>648</Value>
</Attribute>
</Attributes>
</Link>
<Link>
<Identifier>(0x00001d52, 0x00006ff7)</Identifier>
<Source>
<BoxIdentifier>(0x0000210e, 0x000063d9)</BoxIdentifier>
<BoxOutputIndex>0</BoxOutputIndex>
</Source>
<Target>
<BoxIdentifier>(0x00005fad, 0x00003802)</BoxIdentifier>
<BoxInputIndex>0</BoxInputIndex>
</Target>
<Attributes>
<Attribute>
<Identifier>(0x1b32c44c, 0x1905e0e9)</Identifier>
<Value>130</Value>
</Attribute>
<Attribute>
<Identifier>(0x358ae8b5, 0x0f8bacd1)</Identifier>
<Value>577</Value>
</Attribute>
<Attribute>
<Identifier>(0x3f0a3b27, 0x570913d2)</Identifier>
<Value>250</Value>
</Attribute>
<Attribute>
<Identifier>(0x6267b5c5, 0x676e3e42)</Identifier>
<Value>488</Value>
</Attribute>
</Attributes>
</Link>
<Link>
<Identifier>(0x00001e39, 0x00000525)</Identifier>
<Source>
<BoxIdentifier>(0x0000104d, 0x00004d02)</BoxIdentifier>
<BoxOutputIndex>0</BoxOutputIndex>
</Source>
<Target>
<BoxIdentifier>(0x00004722, 0x00006d8c)</BoxIdentifier>
<BoxInputIndex>0</BoxInputIndex>
</Target>
<Attributes>
<Attribute>
<Identifier>(0x1b32c44c, 0x1905e0e9)</Identifier>
<Value>295</Value>
</Attribute>
<Attribute>
<Identifier>(0x358ae8b5, 0x0f8bacd1)</Identifier>
<Value>656</Value>
</Attribute>
<Attribute>
<Identifier>(0x3f0a3b27, 0x570913d2)</Identifier>
<Value>368</Value>
</Attribute>
<Attribute>
<Identifier>(0x6267b5c5, 0x676e3e42)</Identifier>
<Value>640</Value>
</Attribute>
</Attributes>
</Link>
<Link>
<Identifier>(0x00005c31, 0x000002ca)</Identifier>
<Source>
<BoxIdentifier>(0x0000210e, 0x000063d9)</BoxIdentifier>
<BoxOutputIndex>0</BoxOutputIndex>
</Source>
<Target>
<BoxIdentifier>(0x00004c4f, 0x000019e4)</BoxIdentifier>
<BoxInputIndex>1</BoxInputIndex>
</Target>
<Attributes>
<Attribute>
<Identifier>(0x1b32c44c, 0x1905e0e9)</Identifier>
<Value>130</Value>
</Attribute>
<Attribute>
<Identifier>(0x358ae8b5, 0x0f8bacd1)</Identifier>
<Value>577</Value>
</Attribute>
<Attribute>
<Identifier>(0x3f0a3b27, 0x570913d2)</Identifier>
<Value>229</Value>
</Attribute>
<Attribute>
<Identifier>(0x6267b5c5, 0x676e3e42)</Identifier>
<Value>327</Value>
</Attribute>
</Attributes>
</Link>
</Links>
<MessageLinks></MessageLinks>
<Comments></Comments>
<VisualisationTree>
<VisualisationWidget>
<Identifier>(0x000029d5, 0x00004c0a)</Identifier>
<Type>3</Type>
<ParentIdentifier>(0xffffffff, 0xffffffff)</ParentIdentifier>
<BoxIdentifier>(0x00005fad, 0x00003802)</BoxIdentifier>
<NumChildren>0</NumChildren>
</VisualisationWidget>
<VisualisationWidget>
<Identifier>(0x00005df7, 0x000049a4)</Identifier>
<Name>Default window</Name>
<Type>1</Type>
<ParentIdentifier>(0xffffffff, 0xffffffff)</ParentIdentifier>
<BoxIdentifier>(0xffffffff, 0xffffffff)</BoxIdentifier>
<NumChildren>1</NumChildren>
<Attributes>
<Attribute>
<Identifier>(0x4c90d4ad, 0x7a2554ec)</Identifier>
<Value>320</Value>
</Attribute>
<Attribute>
<Identifier>(0x7b814cca, 0x271df6dd)</Identifier>
<Value>480</Value>
</Attribute>
</Attributes>
</VisualisationWidget>
<VisualisationWidget>
<Identifier>(0x00007714, 0x00002861)</Identifier>
<Type>3</Type>
<ParentIdentifier>(0xffffffff, 0xffffffff)</ParentIdentifier>
<BoxIdentifier>(0x00004722, 0x00006d8c)</BoxIdentifier>
<NumChildren>0</NumChildren>
</VisualisationWidget>
<VisualisationWidget>
<Identifier>(0x00000d48, 0x00004189)</Identifier>
<Name>Default tab</Name>
<Type>2</Type>
<ParentIdentifier>(0x00005df7, 0x000049a4)</ParentIdentifier>
<Index>0</Index>
<BoxIdentifier>(0xffffffff, 0xffffffff)</BoxIdentifier>
<NumChildren>1</NumChildren>
</VisualisationWidget>
<VisualisationWidget>
<Identifier>(0x00002dab, 0x00007b49)</Identifier>
<Name>Empty</Name>
<Type>0</Type>
<ParentIdentifier>(0x00000d48, 0x00004189)</ParentIdentifier>
<Index>0</Index>
<BoxIdentifier>(0xffffffff, 0xffffffff)</BoxIdentifier>
<NumChildren>0</NumChildren>
</VisualisationWidget>
</VisualisationTree>
</OpenViBE-Scenario>

Hi,

that is an openvibe scenario .xml. You cannot load a scenario to the Classifier Processor. The xml the classifier processor understands must be generated by a successful run of the Classifier Trainer box. The name and path of the generated file can be specified in the trainer box config and must not be the same as the scenario file.


Best,
Jussi