ex1data.txt

#城市人口 城市面积 饭店利润
 6.1101 62.69120441380838 17.592
 5.5277 57.74808950930212 9.1302
 8.518599999999999 93.69594688419825 13.662
 7.0032 74.01235484635562 11.854
 5.8598 64.20243561589143 6.8233
 8.382899999999999 86.67375685998338 11.886
 7.4764 80.49422253502246 4.3483
 8.578099999999999 89.66779434943763 12
 6.4862 71.25629612859848 6.5987
 5.0546 51.17408335002029 3.8166
 5.7107 57.7446440019858 3.2522
 14.164 153.4374620676878 15.505
 5.734 62.2086406532647 3.1551
 8.4084 91.8230700156108 7.2258
 5.6407 56.68511126495369 0.71618
 5.3794 56.70314334189669 3.5129
 6.3654 64.73218109065455 5.3048
 5.1301 51.40995802544028 0.56077
 6.4296 69.6977688040994 3.6518
 7.0708 76.05952400775523 5.3893
 6.1891 65.84093012546018 3.1386
 20.27 204.7906093885437 21.767
 5.4901 59.86986631632833 4.263
 6.3261 63.82656326696863 5.1875
 5.5649 60.09991999528702 3.0825
 18.945 199.6216843684174 22.638
 12.828 130.768988003362 13.501
 10.957 119.0302896857359 7.0467
 13.176 140.8743525795423 14.692