LAPORAN

SISTEM KENDALI II

No. LST/EKE/EKE 169/05

“ PERCEPTRON “

Oleh :

Nama :

I Wayan Adiyasa 11502241014

Anang Presetyo 11502241018

Kelas : A1

PENDIDIKAN TEKNIK ELEKTRONIKA

FAKULTAS TEKNIK

UNIVERSITAS NEGERI YOGYAKARTA

2013

A. Kompetensi

1. Mahasiswa dapat memahami dan menjelaskan Perceptron.

B. Alat dan Bahan

1. PC

2. Software MATLAB

C. Praktikum

1. Perceptron

Kode program

data_n = 20;in_data = rand(data_n, 2)*2-1;index1 = find(in_data(:,1)+in_data(:,2)>0);index2 = (1:data_n)';index2(index1) = [];data = [in_data(index1, :) -ones(size(index1));... in_data(index2, :) ones(size(index2))]; figure('name', 'Perceptron Demo', 'NumberTitle', 'off');dataH = zeros(data_n, 1);for i = 1:data_n, dataH(i) = line(data(i,1), data(i,2), 'linewidth', 2, ... 'erase', 'xor', 'linestyle', 'x', 'color', 'c');endfor i = 1:length(index1), set(dataH(i), 'linestyle', 'o', 'color', 'y');endaxis square; axis([-1 1 -1 1]);set(gca, 'box', 'on');xlabel('Click and drag on the data points to move them.');title('Perceptron Demo'); lineH = line([-1 1], [-1 1], ... 'linewidth', 2, 'erase', 'xor', 'color', 'm'); r = 0.1;theta = linspace(0, 2*pi);circle_x = r*cos(theta); circle_y = r*sin(theta); circleH = line(nan, nan, 'color', 'r', 'erase', 'xor', 'linewidth', 2); AxisH = gca; FigH = gcf;curr_info = get(AxisH, 'CurrentPoint');current_x = curr_info(1,1); % The following is for animation% action when button is first pushed downaction1 = ['curr_info=get(AxisH, ''currentPoint'');', ... 'start_x=curr_info(1,1);', ... 'start_y=curr_info(1,2);', ... 'prev_x=start_x;', ... 'prev_y=start_y;', ... '[dist,index]=min(sqrt(sum(((ones(data_n,1)*[start_x start_y]-data(:, 1:2)).^2)'')));'...

'if dist > 0.1,', ... 'index = 0;', ... 'end'];% actions after the mouse is pushed downaction2 = ['if index ~= 0,', ... 'curr_info=get(AxisH, ''currentPoint'');', ... 'curr_x=curr_info(1,1);', ... 'curr_y=curr_info(1,2);', ... 'data(index,1) = data(index,1)+curr_x-prev_x;', ... 'data(index,2) = data(index,2)+curr_y-prev_y;', ... 'prev_x = curr_x;', ... 'prev_y = curr_y;', ... 'set(dataH(index), ''xdata'', data(index,1));', ... 'set(dataH(index), ''ydata'', data(index,2));', ... 'end'];% action when button is releasedaction3 = []; % temporary storage for the recall in the down_actionset(AxisH,'UserData',action2); % set action when the mouse is pushed downdown_action=[ ... 'set(FigH,''WindowButtonMotionFcn'',get(AxisH,''UserData''));' ... action1];set(FigH,'WindowButtonDownFcn',down_action); % set action when the mouse is releasedup_action=[ ... 'set(FigH,''WindowButtonMotionFcn'','' '');', action3];set(FigH,'WindowButtonUpFcn',up_action); % Make everything interruptibleset(findobj(FigH,'Interrupt','no'), 'Interrupt','yes'); stop = 0;if matlabv == 4, stopH = uicontrol('string', 'Stop', 'callback', 'stop=1;', 'inter', 'yes');elseif matlabv == 5, stopH = uicontrol('string', 'Stop', 'callback', 'stop=1;', 'inter', 'on');else error('Unknown MATLAB version!');end % The main loopeta = 0.02;wx = 1; wy = -1;theta = 0;%for i = 1:5000,while ~stop, picked = ceil(rand*data_n); set(circleH, 'xdata', circle_x+data(picked, 1), ... 'ydata', circle_y+data(picked, 2)); input = data(picked, 1:2); target = data(picked, 3); perceptron_out = sign([wx wy]*input'+theta); if target ~= perceptron_out,

wx = wx + eta*target*data(picked, 1); wy = wy + eta*target*data(picked, 2); theta = theta + eta*target;% fprintf('count = %d, wx = %f, wy = %f, theta = %f\n', ...% i, wx, wy, theta); end set(lineH, 'ydata', [(wx-theta), -wx-theta]/wy); drawnowend

2. Hasil Program:

Dari percobaan di atas dapat dilihat bahwa hasil program menunjukkan grafik

tegak lurus.

D. KESIMPULAN

1. Perceptron digunakan untuk mengatur bobot dan bias dari jaringan untuk

memindahkan output jaringan mendekati target.