Scikit.Classification.ONNX/Iris_SVCClassifier.mq5

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+
//|                                           Iris_SVCClassifier.mq5 |
//|                                  Copyright 2023, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2023, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

#include "iris.mqh"
#resource "models\\svc_iris.onnx" as const uchar ExtModel[];

//+------------------------------------------------------------------+
//| Test IRIS dataset samples                                        |
//+------------------------------------------------------------------+
bool TestSamples(long model,float &input_data[][4], int &model_classes_id[])
  {
//--- check number of input samples
   ulong batch_size=input_data.Range(0);
   if(batch_size==0)
      return(false);
//--- prepare output array
   ArrayResize(model_classes_id,(int)batch_size);
//---
   ulong input_shape[]= { batch_size, input_data.Range(1)};
   OnnxSetInputShape(model,0,input_shape);
//---
   int output1[];
   float output2[][3];
//---
   ArrayResize(output1,(int)batch_size);
   ArrayResize(output2,(int)batch_size);
//---
   ulong output_shape[]= {batch_size};
   OnnxSetOutputShape(model,0,output_shape);
//---
   ulong output_shape2[]= {batch_size,3};
   OnnxSetOutputShape(model,1,output_shape2);
//---
   bool res=OnnxRun(model,ONNX_DEBUG_LOGS,input_data,output1,output2);
//--- classes are ready in output1[k];
   if(res)
     {
      for(int k=0; k<(int)batch_size; k++)
         model_classes_id[k]=output1[k];
     }
//---
   return(res);
  }
//+------------------------------------------------------------------+
//| Test all samples from IRIS dataset (150)                         |
//| Here we test all samples with batch=1, sample by sample          |
//+------------------------------------------------------------------+
bool TestAllIrisDataset(const long model,const string model_name,double &model_accuracy)
  {
   sIRISsample iris_samples[];
//--- load dataset from file
   PrepareIrisDataset(iris_samples);
//--- test
   int total_samples=ArraySize(iris_samples);
   if(total_samples==0)
     {
      Print("iris dataset not prepared");
      return(false);
     }
//--- show dataset
   for(int k=0; k<total_samples; k++)
     {
      //PrintFormat("%d (%.2f,%.2f,%.2f,%.2f) class %d (%s)",iris_samples[k].sample_id,iris_samples[k].features[0],iris_samples[k].features[1],iris_samples[k].features[2],iris_samples[k].features[3],iris_samples[k].class_id,iris_samples[k].class_name);
     }
//--- array for output classes
   int model_output_classes_id[];
//--- check all Iris dataset samples
   int correct_results=0;
   for(int k=0; k<total_samples; k++)
     {
      //--- input array
      float iris_sample_input_data[1][4];
      //--- prepare input data from kth iris sample dataset
      iris_sample_input_data[0][0]=(float)iris_samples[k].features[0];
      iris_sample_input_data[0][1]=(float)iris_samples[k].features[1];
      iris_sample_input_data[0][2]=(float)iris_samples[k].features[2];
      iris_sample_input_data[0][3]=(float)iris_samples[k].features[3];
      //--- run model
      bool res=TestSamples(model,iris_sample_input_data,model_output_classes_id);
      //--- check result
      if(res)
        {
         if(model_output_classes_id[0]==iris_samples[k].class_id)
           {
            correct_results++;
           }
         else
           {
            PrintFormat("model:%s  sample=%d FAILED [class=%d, true class=%d] features=(%.2f,%.2f,%.2f,%.2f]",model_name,iris_samples[k].sample_id,model_output_classes_id[0],iris_samples[k].class_id,iris_samples[k].features[0],iris_samples[k].features[1],iris_samples[k].features[2],iris_samples[k].features[3]);
           }
        }
     }
   model_accuracy=1.0*correct_results/total_samples;
//---
   PrintFormat("model:%s   correct results: %.2f%%",model_name,100*model_accuracy);
//---
   return(true);
  }

//+------------------------------------------------------------------+
//| Here we test batch execution of the model                        |
//+------------------------------------------------------------------+
bool TestBatchExecution(const long model,const string model_name,double &model_accuracy)
  {
   model_accuracy=0;
//--- array for output classes
   int model_output_classes_id[];
   int correct_results=0;
   int total_results=0;
   bool res=false;

//--- run batch with 3 samples
   float input_data_batch3[3][4]=
     {
        {5.1f,3.5f,1.4f,0.2f}, // iris dataset sample id=1, Iris-setosa
        {6.3f,2.5f,4.9f,1.5f}, // iris dataset sample id=73, Iris-versicolor
        {6.3f,2.7f,4.9f,1.8f}  // iris dataset sample id=124, Iris-virginica
     };
   int correct_classes_batch3[3]= {0,1,2};
//--- run model
   res=TestSamples(model,input_data_batch3,model_output_classes_id);
   if(res)
     {
      //--- check result
      for(int j=0; j<ArraySize(model_output_classes_id); j++)
        {
         //--- check result
         if(model_output_classes_id[j]==correct_classes_batch3[j])
            correct_results++;
         else
           {
            PrintFormat("model:%s  FAILED [class=%d, true class=%d] features=(%.2f,%.2f,%.2f,%.2f)",model_name,model_output_classes_id[j],correct_classes_batch3[j],input_data_batch3[j][0],input_data_batch3[j][1],input_data_batch3[j][2],input_data_batch3[j][3]);
           }
         total_results++;
        }
     }
   else
      return(false);

//--- run batch with 10 samples
   float input_data_batch10[10][4]=
     {
        {5.5f,3.5f,1.3f,0.2f}, // iris dataset sample id=37 (Iris-setosa)
        {4.9f,3.1f,1.5f,0.1f}, // iris dataset sample id=38 (Iris-setosa)
        {4.4f,3.0f,1.3f,0.2f}, // iris dataset sample id=39 (Iris-setosa)
        {5.0f,3.3f,1.4f,0.2f}, // iris dataset sample id=50 (Iris-setosa)
        {7.0f,3.2f,4.7f,1.4f}, // iris dataset sample id=51 (Iris-versicolor)
        {6.4f,3.2f,4.5f,1.5f}, // iris dataset sample id=52 (Iris-versicolor)
        {6.3f,3.3f,6.0f,2.5f}, // iris dataset sample id=101 (Iris-virginica)
        {5.8f,2.7f,5.1f,1.9f}, // iris dataset sample id=102 (Iris-virginica)
        {7.1f,3.0f,5.9f,2.1f}, // iris dataset sample id=103 (Iris-virginica)
        {6.3f,2.9f,5.6f,1.8f}  // iris dataset sample id=104 (Iris-virginica)
     };
//--- correct classes for all 10 samples in the batch
   int correct_classes_batch10[10]= {0,0,0,0,1,1,2,2,2,2};

//--- run model
   res=TestSamples(model,input_data_batch10,model_output_classes_id);
//--- check result
   if(res)
     {
      for(int j=0; j<ArraySize(model_output_classes_id); j++)
        {
         if(model_output_classes_id[j]==correct_classes_batch10[j])
            correct_results++;
         else
           {
            double f1=input_data_batch10[j][0];
            double f2=input_data_batch10[j][1];
            double f3=input_data_batch10[j][2];
            double f4=input_data_batch10[j][3];
            PrintFormat("model:%s  FAILED [class=%d, true class=%d] features=(%.2f,%.2f,%.2f,%.2f)",model_name,model_output_classes_id[j],correct_classes_batch10[j],input_data_batch10[j][0],input_data_batch10[j][1],input_data_batch10[j][2],input_data_batch10[j][3]);
           }
         total_results++;
        }
     }
   else
      return(false);

//--- calculate accuracy
   model_accuracy=correct_results/total_results;
//---
   return(res);
  }
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
int OnStart(void)
  {
   string model_name="SVCClassifier";
//---
   long model=OnnxCreateFromBuffer(ExtModel,ONNX_DEFAULT);
   if(model==INVALID_HANDLE)
     {
      PrintFormat("model_name=%s OnnxCreate error %d for",model_name,GetLastError());
     }
   else
     {
      //--- test all dataset
      double model_accuracy=0;
      //-- test sample by sample execution for all Iris dataset
      if(TestAllIrisDataset(model,model_name,model_accuracy))
         PrintFormat("model=%s all samples accuracy=%f",model_name,model_accuracy);
      else
         PrintFormat("error in testing model=%s ",model_name);
      //--- test batch execution for several samples
      if(TestBatchExecution(model,model_name,model_accuracy))
         PrintFormat("model=%s batch test accuracy=%f",model_name,model_accuracy);
      else
         PrintFormat("error in testing model=%s ",model_name);
      //--- release model
      OnnxRelease(model);
     }
   return(0);
  }
//+------------------------------------------------------------------+