SlpTrainAND.cc

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#include "ae2f/Float.h"
#include "ae2f/errGlob.h"
#include <ae2f/Ann/Slp.h>
#include <stdio.h>
#include <math.h>
 
static void
Act(ae2f_float_t* r, ae2f_float_t x) {
    *r = 1.0 / (1.0 + exp(-x));
}
 
static void
ActDeriv(ae2f_float_t* r, ae2f_float_t output) {
    output += 1e-7;
    *r = output * (1.0 - output);
}
 
/** Cross entrophy */
static void
LossDeriv(ae2f_float_t* r, const ae2f_float_t* output, const ae2f_float_t* target, size_t i, size_t c) {
    ae2f_float_t epsilon = 1e-7; // Small value to prevent division by zero
    ae2f_float_t o_i = output[i];
    // Clip output to avoid log(0) or division by zero
    o_i = o_i < epsilon ? epsilon : (o_i > 1.0 - epsilon ? 1.0 - epsilon : o_i);
    *r = (o_i - target[i]) / (c * o_i * (1.0 - o_i));
}
 
const ae2f_float_t inp[4][2] = { 1, 1, 0, 0, 0, 1, 1, 0 };
const ae2f_float_t goal_and[4] = {1, 0, 0, 0 };
const ae2f_float_t goal_or[4] = {1, 0, 1, 1 };
 
ae2f_float_t output[1] = {0, };
 
ae2f_err_t err = 0;
ae2f_AnnSlp* slp = 0;
 
size_t i, j;
bool mismatch = 0;
 
#define THRESHOLD 0.01
#define DIFF_GOOD(a, b) (((a) - (b)) * ((a) - (b))) < THRESHOLD
 
int tryand() {
    puts("Trial: tryand");
    err = 0;
 
    do {
 
        slp = new (
                NULL, NULL, NULL
                , 2
                , 1, 0
                , Act, ActDeriv, LossDeriv
                , 0.1, 0.1
                , &err
              ) ae2f_AnnSlp;
 
        printf("Learningrate dump: %f, %f\n", slp->m_learningrate, slp->m_learningrate_bias);
        printf("function points: %p %p %p\n", slp->m_act, slp->m_actderiv, slp->m_lossderiv);
 
        if(err) break;
 
        for(i = 0 ; i < 2 * 1 + 1; ++i) {
            slp->m_weight[i] = 0.2;
        }
 
 
        for(i = 0; i < 1000; ++i) {
            for(j = 0; j < sizeof(inp) / sizeof(inp[0]); ++j) {
                slp->Train(&err, inp[j], &goal_and[j]);
                if(err) break;
            }
        }
 
        for(j = 0; j < sizeof(inp) / sizeof(inp[0]); ++j) {
            slp->Predict(&err, inp[j], output);
            if(err) break;
 
            printf("Got %f\n", *output);
            if(DIFF_GOOD(output[0], goal_and[j])) {
                printf("Match. Expected %f\n.", goal_and[j]);
            } else {
                printf("Expected %f. Unexpected.\n", goal_and[j]);
                mismatch = 1;
            }
        }
    } while(0);
 
    if(mismatch) {
        err |= ae2f_errGlob_NFOUND;
    }
 
    if(slp) delete (slp);
    else puts("slp is null");
    printf("Code from tryand: %d\n", err);
 
    return err;
}
 
int main() {
    return tryand();
}