Informações sobre entradas e saídas do modelo ONNX - script para MetaTrader 5

A função de execução do modelo ONNX requer que as dimensões de entrada e saída estejam definidas. As funções OnnxSetInputShape e OnnxSetOutputShape são usadas para especificar as dimensões, respectivamente.

Nem todos os modelos têm tamanhos de entrada e saída fixos. Nesses casos, o script mostra o valor -1 (menos 1).

   OnnxTypeInfo type_info;    long input_count=OnnxGetInputCount(session_handle);    Print("model has ",input_count," input(s)");    for(long i=0; i<input_count; i++)      {       string input_name=OnnxGetInputName(session_handle,i);       Print(i," input name is ",input_name);       if(OnnxGetInputTypeInfo(session_handle,i,type_info))          PrintTypeInfo(i,"input",type_info);      }    long output_count=OnnxGetOutputCount(session_handle);    Print("model has ",output_count," output(s)");    for(long i=0; i<output_count; i++)      {       string output_name=OnnxGetOutputName(session_handle,i);       Print(i," output name is ",output_name);       if(OnnxGetOutputTypeInfo(session_handle,i,type_info))          PrintTypeInfo(i,"output",type_info);      } 

A seleção de modelo na pasta MQL5\Files é efetuada utilizando a função FileSelectDialog

A seguir, um exemplo de como o script funciona:

Create model from mnist.onnx with debug logs ONNX: Creating and using per session threadpools since use_per_session_threads_ is true ONNX: Dynamic block base set to 0 ONNX: Initializing session. ONNX: Adding default CPU execution provider. ONNX: Removing initializer 'Parameter6'. It is no longer used by any node. ONNX: Removing initializer 'Parameter88'. It is no longer used by any node. ONNX: Total shared scalar initializer count: 0 ONNX: Removing initializer 'Parameter193_reshape1_shape'. It is no longer used by any node. ONNX: Removing initializer 'Parameter193'. It is no longer used by any node. ONNX: Total fused reshape node count: 0 ONNX: Total shared scalar initializer count: 0 ONNX: Total fused reshape node count: 0 ONNX: Removing initializer 'Parameter5'. It is no longer used by any node. ONNX: Removing initializer 'Parameter87'. It is no longer used by any node. ONNX: Use DeviceBasedPartition as default ONNX: Saving initialized tensors. ONNX: Done saving initialized tensors ONNX: Session successfully initialized. model has 1 input(s) 0 input name is Input3    type ONNX_TYPE_TENSOR    data type ONNX_DATA_TYPE_FLOAT    shape [1, 1, 28, 28]    shape of input data can be reduced to [28, 28] model has 1 output(s) 0 output name is Plus214_Output_0    type ONNX_TYPE_TENSOR    data type ONNX_DATA_TYPE_FLOAT    shape [1, 10]    shape of output data can be reduced to [10]