自己编了一个感知机算法,前边的输出都没有问题,在第二十次循环的时候,原本结果该是[0.05,0.05,0.15],但是却出现了奇怪的结果
[ 5.00000000e-02 -1.38777878e-17 1.50000000e-01]
后面也有这种输出(x,y也是)
求大神告诉我为啥会出现这个结果呢?
import sys
import numpy as np
def cal(a):
if a>0:
o=1
else:
o=0
return o
input=np.array([[-1,0,0],[-1,0,1],[-1,1,0],[-1,1,1]])
t=np.array([0,0,0,1])
w=np.array([-0.1,-0.2,0.2])
weight=w.transpose()
index=range(3)
count=0
loop=0
while(1):
for i in range(4):
loop=loop+1;
a=input[i]
x=np.dot(a,weight)
print 'No loop',loop,'x=',x
y=cal(x)
print 'No. loop',loop,'y=',y
if y==t[i]:
count=count+1
else:
count=0
for n in range(3):
weight[n]=weight[n]+0.05*(t[i]-y)*a[n]
print weight
if count==4:
break
if count==4:
break
aa=np.array([ 0.1,-0.05,0.1]);
for n in range(3):
aa[n]=aa[n]+0.05*(1-0)*a[n]
print aa
/**
* 驗證碼類
*/
$code= new Code();
$code->outImage();
class Codeted
{
tected受保護的$codeType;
受保護的$width;
受保護的$height;
受保護的$image;
受保護的$code;
public函數__construct($number=4,$codeType=2,$width= 100,$height=30)
{
$this->number=$number;
$this->codeType=$codeType;
$this->width=$width;
$this ->height=$height;
$this->code=$this->createCode();
}
公用函數
公用函數){return $code;
}
) join ('',range (0, 9)); return substr(str_shuffle($str), 0,$this->number); } protected function getCharCode(){}
protected function getCharCode(){
} protected ( '',range (a, z)); $str=$str.strtoupper($str); return substr(str_shuffle($str), 0,$this->number); }$this->image=imagecreatetruecolor($this->width, $this->height);
}
protected function fillBack(){
imagefill($this->, this > 0, $ $, this- > lightColor());
}
受保護函數lightColor(){
return imagecolorallocate($this->image, mt_rand(130,255), 155($
} protected function darkColor(){ return imagecolorallocate($this->image, mt_rand(0,120), mt_rand(0,120), mt_rand(0,120)); }}
0; $i 數字; $i++) { $Width=$this->寬度/$this->數字;$x=mt_rand($i*$Width+10,($i+1)*$Width-15);
$y=mt_rand(0,$this->height-18);
imagechar( $ this->image, 6, $x, $y, $this->code[$i], $this->darkColor());
}
}
受保護函數drawDistrub(){
for
forfor ( $i=0; $i
$x=mt_rand(0,$this->寬度);
$y=mt_rand(0,$this->寬度);
$ y =mt_rand(0,$this->寬度) height);
imagesetpixel($this->image, $x, $y, $this->lightColor());
}
}
show (){
header("內容-類型:image/png");
imagepng($this->image);
}
}🎜🎜?>🎜🎜 }🎜🎜