Thread: Modifying FANN library

Hi,

I want to use Fast Artificial Neural Network Library (fann). This is a performance critical work. I want to use:

Code:

typedef int16_t fann_type;

In a header file.

Also I want to implement relu function for neurons as activation function.

Should I just modify the FANN library code and compile it as a static library ? Anything else ?

Experimenting on this , I changed the file "fixedfann.h" to :

Code:

typedef int16_t fann_type;//int fann_type;

I have two demonstrating source files:

example_train.c

Code:

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "floatfann.h"


#define TRAIN_TIMES 5000


float input[4][2] = {{0, 0}, {0, 1}, {1, 0}, {1, 1}};
float output[4] = {0, 1, 1, 0};


int main(void)
{
    printf("FANN example_train\n");
    
    srand(time(NULL));


    int i;


    struct fann *ann = fann_create_standard(3, 2, 2, 1);


    for (i = 0; i < TRAIN_TIMES; ++i) {
        fann_train(ann, input[0], output+0 );
        fann_train(ann, input[1], output+1 );
        fann_train(ann, input[2], output+2 );
        fann_train(ann, input[3], output+3 );
    }
    
    //fann_save(ann, "example_float.net");
    fann_save_to_fixed(ann, "example_fixed.net");


    fann_destroy(ann);
    return 0;
}

And
example_run.c

Code:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "fixedfann.h"


int16_t input[4][2] = {{0, 0}, {0, 1}, {1, 0}, {1, 1}};


int main(void)
{


    //struct fann *ann_saved = fann_create_from_file("example_float.net");
    struct fann *ann_saved = fann_create_from_file("example_fixed.net");
    
    printf("Output for [%d, %d] is %d.\n", input[0][0], input[0][1], *fann_run(ann_saved, input[0]));
    printf("Output for [%d, %d] is %d.\n", input[1][0], input[1][1], *fann_run(ann_saved, input[1]));
    printf("Output for [%d, %d] is %d.\n", input[2][0], input[2][1], *fann_run(ann_saved, input[2]));
    printf("Output for [%d, %d] is %d.\n", input[3][0], input[3][1], *fann_run(ann_saved, input[3]));


    fann_destroy(ann_saved);
    return 0;
}

Now I have two questions:

1. How to use a single copy of input that right now is in both files?
2. How to get proper output since I receive this error :

Code:

FANN Error 3: Wrong version of configuration file, aborting read of configuration file "example_fixed.net".

This compilation passes and gives no error:

Code:

gcc -Wall -Wextra -pedantic example_train.c -lfann -fopenmp -static -lm
gcc -Wall -Wextra -pedantic example_run.c -lfixedfann -fopenmp -static -lm