感知器 | JavaScript 程式專案

{"id":75291,"student_id":10,"content":"function sigmoid(x) {\n    return (Math.exp(x) - Math.exp(-x)) / (Math.exp(x) + Math.exp(-x));\n}\n\nfunction dsigmoid(x) {\n    return 1.0 - x*x;\n}\n\nvar ia = 0; //輸入：耳朵長度\nvar ib = 0; //輸入：尾巴長度\nvar wa = 0; //權重：耳朵長度\nvar wb = 0; //權重尾巴長度\nvar rate = 0.01; // 速率\n\n// 訓練感知器的假資料 [耳朵長度, 尾巴長度, 物種]\nvar data = [\n    //一般貓咪\n    [3.5, 12.1, 1],\n    [3.8, 12.3, 1],\n    [3.2, 12.5, 1],\n    [4.0, 13.1, 1],\n    [3.9, 13.0, 1],\n    [3.5, 12.7, 1],\n    [3.7, 12.8, 1],\n    [3.5, 12.9, 1],\n    [3.3, 12.3, 1],\n    [3.3, 12.9, 1],\n    //一般兔子\n    [9.1, 7.2, -1],\n    [8.7, 7.4, -1],\n    [9.3, 7.6, -1],\n    [9.2, 7.1, -1],\n    [9.0, 7.9, -1],\n    [9.1, 6.8, -1],\n    [8.5, 7.8, -1],\n    [8.6, 8.1, -1],\n    [8.9, 8.3, -1],\n    [8.8, 7.9, -1],\n];\n\n\n// 繪圖 \u0026 顯示數值\nforever(function() {\n    pen.fillColor = 'black';\n    pen.drawLine(100, 100, 300, 240);\n    pen.drawLine(100, 380, 300, 240);\n    pen.drawLine(300, 240, 450, 240);\n    pen.drawCircle(100, 100, 20);\n    pen.drawCircle(100, 380, 20);\n    pen.drawCircle(300, 240, 20);\n    \n    var output = NN(ia, ib, wa, wb);\n    print('i1: ' + ia, 90, 60, 'blue');\n    print('i2: ' + ib, 90, 340, 'blue');\n    print('w1: ' + wa, 200, 170, 'red');\n    print('w1: ' + wb, 200, 310, 'red');\n    print(output, 455, 230, 'green');\n    \n    cat.opacity = (output+1)/2;\n    rabbit.opacity = 1- (output+1)/2;\n});\n\n// 感知器\nfunction NN (input_a, input_b, weight_a, weight_b) {\n    return sigmoid(input_a*weight_a + input_b*weight_b);\n}\n\n// 訓練\nfunction train (input_a, input_b, target) {\n    var output = NN(input_a, input_b, wa, wb);\n    var lose = target - output;\n    var error = lose*dsigmoid(output);\n    wa += rate*input_a*error;\n    wb += rate*input_b*error;\n}\n\n// 按下「空白」按鍵時進行一輪訓練\nwhen('keydown', 'space', () =\u003e {\n    data.forEach((d) =\u003e {\n        train(d[0], d[1], d[2]);\n    });\n});\n\n// 點擊畫面時輸入耳朵長度\u0026尾巴長度\nwhen('click', () =\u003e {\n    ia = Number(prompt('耳朵長度?'));\n    ib = Number(prompt('尾巴長度?'));\n});\n\n","created_at":"2019-06-26T16:54:40.214+08:00","updated_at":"2019-11-09T06:56:52.731+08:00","name":"感知器","language":"javascript","screenshot":{"url":"https://cdn0.koding.school/uploads/project/screenshot/75291/26efe5ed16410e625ad3a42d69dd8b75.jpg"},"parent_id":2,"plugin":"var cat = createSprite('cat.jpeg');\nvar rabbit = createSprite('rabbit.jpg');\ncat.moveTo(500, 100);\ncat.scale = 0.5;\nrabbit.moveTo(500, 380);\nrabbit.scale = 0.5;","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":289,"hashid":"gk4swpvj","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}