这是我的作品
#include<iostream.h>
using namespace std;
void gradiantFunction(x,y,th0,th1,a)
{
double temp0,temp1;
for (int i = 0; i < m.size(); i++)
{
h=th0+th1*x[i];
temp0=temp0+(h-y[i]);
temp1=temp1+(h-y[i])*x[i];
/* delta = y[i]-hypothesis(x[i]);
theta[1] += alpha*delta*x[i];
theta[0] += alpha*delta*1;*/
}
temp0=temp0*a/m;
temp1=temp1*a/m;
}
void CostFunction(x,y,th0,th1,a)
{
double temp2=0;
for (int i = 0; i < m.size(); i++)
{
h=th0+th1*x[i];
temp2=temp2+(h-y[i]);
}
double j=temp2/(2*m);
}
void main()
{
double a=0.01, th0=0.1, th1=0.2, temp0,temp1, jHistory[];
int m=1500;
for(int i=1; i<=m;i++)
{
th0=th0-temp0;
th1=th1-temp1;
double j= CostFunction()
double jHistory[i]=j;
}
我希望代码能够学习thetas
的这些值 - 6.1101 17.592
- 5.5277 9.1302
- 8.5186 13.662
- 7.0032 11.854
- 5.8598 6.8233
- 8.3829 11.886
- 7.4764 4.3483
- 8.5781 12
- 6.4862 6.5987
- 5.0546 3.8166
- 5.7107 3.2522
- 14.164 15.505
- 5.734 3.1551
- 8.4084 7.2258
- 5.6407 0.71618
- 5.3794 3.5129
- 6.3654 5.3048
- 5.1301 0.56077
- 6.4296 3.6518
- 7.0708 5.3893
- 6.1891 3.1386
- 20.27 21.767
- 5.4901 4.263
- 6.3261 5.1875
- 5.5649 3.0825
- 18.945 22.638
- 12.828 13.501
10.957 7.0467
13.176 14.692
22.203 24.147
5.2524 -1.22
6.5894 5.9966
9.2482 12.134
5.8918 1.8495
8.2111 6.5426
7.9334 4.5623
8.0959 4.1164
5.6063 3.3928
12.836 10.117
6.3534 5.4974
5.4069 0.55657
6.8825 3.9115
11.708 5.3854
5.7737 2.4406
7.8247 6.7318
7.0931 1.0463
5.0702 5.1337
5.8014 1.844
11.7 8.0043
5.5416 1.0179
7.5402 6.7504
5.3077 1.8396
7.4239 4.2885
7.6031 4.9981
6.3328 1.4233
6.3589 -1.4211
6.2742 2.4756
5.6397 4.6042
9.3102 3.9624
9.4536 5.4141
8.8254 5.1694
5.1793 -0.74279
21.279 17.929
14.908 12.054
18.959 17.054
7.2182 4.8852
8.2951 5.7442
10.236 7.7754
5.4994 1.0173
20.341 20.992
10.136 6.6799
7.3345 4.0259
6.0062 1.2784
7.2259 3.3411
5.0269 -2.6807
6.5479 0.29678
7.5386 3.8845
5.0365 5.7014
10.274 6.7526
5.1077 2.0576
5.7292 0.47953
5.1884 0.20421
6.3557 0.67861
9.7687 7.5435
6.5159 5.3436
8.5172 4.2415
9.1802 6.7981
6.002 0.92695
5.5204 0.152
5.0594 2.8214
5.7077 1.8451
7.6366 4.2959
5.8707 7.2029
5.3054 1.9869
8.2934 0.14454
13.394 9.0551
5.4369 0.61705