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feat(knowing app): stm32f4 logistic regression iris demo

pull/7/head
yangtuo250 1 year ago
parent
commit
b9d10a7cf1
  1. 41
      APP_Framework/Applications/knowing_app/iris_ml_demo/LogisticRegressionModel.h
  2. 20
      APP_Framework/Applications/knowing_app/iris_ml_demo/iris_ml_demo.c

41
APP_Framework/Applications/knowing_app/iris_ml_demo/LogisticRegressionModel.h

@ -0,0 +1,41 @@
#include <stdarg.h>
/**
* Compute dot product
*/
float dot(float *x, ...)
{
va_list w;
va_start(w, 4);
float dot = 0.0;
for (int i = 0; i < 4; i++) {
const float wi = va_arg(w, double);
dot += x[i] * wi;
}
return dot;
}
/**
* Predict class for features vector
*/
int predict(float *x)
{
float votes[3] = {0.0f};
votes[0] = dot(x, -0.423405592418, 0.967388282125, -2.517050233286, -1.079182996654) + 9.84868307535428;
votes[1] = dot(x, 0.534517184386, -0.321908835083, -0.206465997471, -0.944448257908) + 2.238120068472271;
votes[2] = dot(x, -0.111111591968, -0.645479447042, 2.723516230758, 2.023631254562) + -12.086803143826813;
// return argmax of votes
int classIdx = 0;
float maxVotes = votes[0];
for (int i = 1; i < 3; i++) {
if (votes[i] > maxVotes) {
classIdx = i;
maxVotes = votes[i];
}
}
return classIdx;
}

20
APP_Framework/Applications/knowing_app/iris_ml_demo/iris_ml_demo.c

@ -76,3 +76,23 @@ void iris_DecisonTree_predict()
#ifdef __RT_THREAD_H__
MSH_CMD_EXPORT(iris_DecisonTree_predict, iris predict by decison tree classifier);
#endif
void iris_LogisticRegression_predict()
{
#include "LogisticRegressionModel.h"
int result;
simple_CSV_read();
for (int i = 0; i < data_len; i++) {
result = predict(data[i]);
printf("data %d: ", i + 1);
for (int j = 0; j < FEATURE_NUM; j++) {
printf("%.4f ", data[i][j]);
}
printf("result: %d\n", result);
}
}
#ifdef __RT_THREAD_H__
MSH_CMD_EXPORT(iris_LogisticRegression_predict, iris predict by logistic regression);
#endif

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