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require 'formula'
class Fann < Formula
homepage 'http://leenissen.dk/fann/wp/'
url 'http://downloads.sourceforge.net/project/fann/fann/2.2.0/FANN-2.2.0-Source.tar.gz'
sha1 'ff8341e4104bdbc0f3ab7ad39aef33285f8512d4'
depends_on 'cmake' => :build
option :universal
def install
ENV.universal_binary if build.universal?
system "cmake", ".", *std_cmake_args
system "make install"
end
test do
(testpath/'xor.data').write <<-EOS.undent
4 2 1
-1 -1
-1
-1 1
1
1 -1
1
1 1
-1
EOS
(testpath/'test.c').write <<-EOS.undent
#include "fann.h"
int main()
{
const unsigned int num_input = 2;
const unsigned int num_output = 1;
const unsigned int num_layers = 3;
const unsigned int num_neurons_hidden = 3;
const float desired_error = (const float) 0.001;
const unsigned int max_epochs = 500000;
const unsigned int epochs_between_reports = 1000;
struct fann *ann = fann_create_standard(num_layers, num_input,
num_neurons_hidden, num_output);
fann_set_activation_function_hidden(ann, FANN_SIGMOID_SYMMETRIC);
fann_set_activation_function_output(ann, FANN_SIGMOID_SYMMETRIC);
fann_train_on_file(ann, "xor.data", max_epochs,
epochs_between_reports, desired_error);
fann_save(ann, "xor_float.net");
fann_destroy(ann);
return 0;
}
EOS
system ENV.cc, "-o", "test", "test.c", "-lfann"
system "./test"
system "cat xor_float.net"
puts
end
end
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