为什么我的取值和计算结果都和老师不同呢-慕课网

close signal profit_pct cum_profit 2005-01-10 1.47 -1 0.006849 0.006849 2005-01-17 1.40 -1 -0.034483 -0.027870 2005-01-24 1.45 -1 0.013986 -0.014273 2005-01-31 1.36 -1 -0.014493 -0.028559 2005-02-21 1.50 -1 0.013514 -0.015432 2005-02-28 1.45 -1 -0.026846 -0.041863 2005-03-07 1.40 -1 -0.014085 -0.055358 2005-03-14 1.36 -1 -0.007299 -0.062253 2005-03-21 1.33 -1 0.000000 -0.062253 2005-03-28 1.19 -1 -0.016529 -0.077753 2005-04-04 1.21 -1 -0.032000 -0.107265 2005-04-11 1.55 -1 0.019737 -0.089645 2005-04-18 1.44 -1 -0.027027 -0.114249 2005-04-25 1.30 -1 -0.029851 -0.140690 2005-05-09 1.36 -1 -0.021583 -0.159236 2005-05-16 1.32 -1 -0.022222 -0.177920 2005-05-23 1.33 -1 -0.043165 -0.213405 2005-05-30 1.37 -1 -0.007246 -0.219105 2005-06-06 1.33 -1 0.023077 -0.201084 2005-06-13 1.45 -1 -0.013605 -0.211954 2005-06-20 1.43 -1 0.000000 -0.211954 2005-06-27 1.44 -1 0.021277 -0.195187 2005-07-04 1.31 -1 0.007692 -0.188996 2005-07-11 1.23 -1 0.008197 -0.182349 2005-07-18 1.26 -1 -0.007874 -0.188787 2005-07-25 1.33 -1 0.000000 -0.188787 2005-08-01 1.33 -1 0.000000 -0.188787 2005-08-08 1.40 -1 0.007194 -0.182951 2005-08-15 1.41 -1 0.014388 -0.171195 2005-08-22 1.35 -1 0.007463 -0.165010 2005-08-29 1.36 -1 -0.014493 -0.177111 2005-09-05 1.41 -1 0.007143 -0.171233 2005-09-12 1.40 -1 0.000000 -0.171233 2005-09-19 1.41 -1 0.000000 -0.171233 2005-09-26 1.33 -1 0.015267 -0.158580 2005-10-10 1.29 -1 0.000000 -0.158580 2005-10-17 1.29 -1 0.000000 -0.158580 2005-10-24 1.40 -1 -0.014085 -0.170431 2005-10-31 1.28 -1 0.024000 -0.150522 2005-11-07 1.28 -1 0.000000 -0.150522 2005-11-14 1.25 -1 0.008065 -0.143671 2005-11-21 1.28 -1 -0.007752 -0.150309 2005-11-28 1.30 -1 -0.015152 -0.163183 2005-12-05 1.26 -1 -0.030769 -0.188931 2005-12-12 1.32 -1 0.000000 -0.188931 2005-12-19 1.34 -1 -0.007407 -0.194939 2005-12-26 1.39 -1 0.014599 -0.183187 2006-01-09 1.43 -1 0.000000 -0.183187 2006-01-16 1.36 -1 -0.021583 -0.200816 2006-01-23 1.38 -1 -0.007194 -0.206565 2006-02-06 1.43 -1 0.007042 -0.200978 2006-02-13 1.39 -1 0.000000 -0.200978 2006-02-20 1.41 -1 0.007143 -0.195270 2006-02-27 1.53 -1 -0.025478 -0.215773 2006-03-06 1.47 -1 0.006849 -0.210402 2006-03-13 1.40 -1 0.014493 -0.198958 2006-03-20 1.41 -1 0.014388 -0.187432 2006-03-27 1.42 -1 0.007092 -0.181669 2006-04-03 1.43 -1 0.000000 -0.181669 2006-04-10 1.51 -1 0.041379 -0.147807 2006-04-17 1.53 -1 0.000000 -0.147807 2006-04-24 1.46 -1 -0.045752 -0.186797 2006-05-08 1.76 -1 0.000000 -0.186797 2006-05-15 1.93 -1 0.010471 -0.178281 2006-05-22 1.84 -1 -0.010753 -0.187117 2006-05-29 1.97 -1 0.000000 -0.187117 2006-06-05 1.97 -1 0.000000 -0.187117 2006-06-12 1.77 -1 -0.101523 -0.269643 2006-06-19 1.58 -1 -0.006289 -0.274237 2006-06-26 1.63 -1 0.000000 -0.274237 2006-07-03 1.81 -1 0.071006 -0.222703 2006-07-10 1.73 -1 0.000000 -0.222703 2006-07-17 1.73 -1 0.000000 -0.222703 2006-07-24 1.62 -1 0.006211 -0.217875 2006-07-31 1.50 -1 -0.038462 -0.247957 2006-08-07 1.47 -1 -0.013423 -0.258052 2006-08-14 1.52 -1 -0.006536 -0.262901 2006-08-21 1.58 -1 0.019355 -0.248635 2006-08-28 1.63 -1 0.044872 -0.214919 2006-09-04 1.59 -1 0.006329 -0.209951 2006-09-11 1.66 -1 0.024691 -0.190443 2006-09-18 1.71 -1 0.000000 -0.190443 2006-09-25 1.70 -1 0.011905 -0.180806 2006-10-09 1.94 -1 0.060109 -0.131564 2006-10-16 1.98 -1 -0.019802 -0.148761 2006-10-23 2.02 -1 -0.004926 -0.152954 2006-10-30 2.10 -1 -0.041096 -0.187764 2006-11-06 2.21 -1 0.032710 -0.161196 2006-11-13 2.26 -1 -0.021645 -0.179352 2006-11-20 2.41 -1 0.047826 -0.140104 2006-11-27 2.82 -1 -0.007042 -0.146159 2006-12-04 2.94 -1 0.057554 -0.097017 2006-12-11 3.03 -1 0.030612 -0.069375 2006-12-18 3.04 -1 0.016722 -0.053813 2006-12-25 2.99 -1 0.027491 -0.027801 2007-01-08 2.99 -1 0.023973 -0.004494 2007-01-15 3.65 -1 0.051873 0.047146 2007-01-22 3.97 -1 0.047493 0.096878 2007-01-29 4.29 -1 0.048900 0.150515 2007-02-05 3.74 -1 -0.048346 0.094892 2007-02-12 4.32 -1 0.048544 0.148042 2007-02-26 4.52 -1 -0.030043 0.113552 2007-03-05 3.92 -1 -0.036855 0.072512 2007-03-12 4.12 -1 -0.028302 0.042158 2007-03-19 4.24 -1 0.049505 0.093750 2007-03-26 4.29 -1 -0.011521 0.081149 2007-04-02 4.32 -1 0.021277 0.104152 2007-04-09 4.41 -1 0.006849 0.111715 2007-04-16 5.31 -1 0.011429 0.124420 2007-04-23 5.31 -1 0.049407 0.179974 2007-04-30 5.81 -1 0.000000 0.179974 2007-05-14 6.23 -1 0.000000 0.179974 2007-05-21 6.23 -1 0.000000 0.179974 2007-05-28 6.40 -1 -0.021407 0.154715 2007-06-04 6.42 -1 0.000000 0.154715 2007-06-11 6.42 -1 0.000000 0.154715 2007-06-18 6.42 -1 0.000000 0.154715 2007-06-25 8.67 -1 -0.005734 0.148094 2007-07-02 6.75 -1 -0.004425 0.143014 2007-07-09 6.92 -1 0.040602 0.189422 2007-07-16 6.54 -1 -0.063037 0.114444 2007-07-23 8.11 -1 0.079893 0.203481 2007-07-30 8.42 -1 0.009592 0.215025 2007-08-06 9.65 -1 0.002077 0.217548 2007-08-13 9.63 -1 0.003125 0.221353 2007-08-20 9.33 -1 0.086147 0.326569 2007-08-27 9.65 -1 -0.010256 0.312963 2007-09-03 9.33 -1 -0.003205 0.308755 2007-09-10 9.25 -1 0.012035 0.324506 2007-09-17 8.96 -1 0.000000 0.324506 2007-09-24 9.38 -1 0.053933 0.395940 2007-10-08 10.25 -1 0.040609 0.452628 2007-10-15 9.80 -1 0.010309 0.467603 2007-10-22 9.80 -1 0.000000 0.467603 2007-10-29 11.14 -1 0.014572 0.488989 2007-11-05 10.78 -1 -0.037500 0.433152 2007-11-12 10.27 -1 -0.014395 0.412521 2007-11-19 9.32 -1 -0.019979 0.384300 2007-11-26 8.93 -1 -0.019759 0.356949 2007-12-03 9.43 -1 0.061937 0.440994 2007-12-10 9.63 -1 -0.017347 0.415997 2007-12-17 8.70 -1 -0.053319 0.340498 2007-12-24 9.37 -1 0.035359 0.387897 2008-01-07 9.65 -1 0.021164 0.417270 2008-01-14 10.70 -1 -0.013825 0.397677 2008-01-21 9.31 -1 -0.075472 0.292191 2008-01-28 8.72 -1 -0.070362 0.201270 2008-02-04 9.34 -1 0.097532 0.318432 2008-02-18 8.99 -1 0.012387 0.334764 2008-02-25 7.56 -1 -0.047859 0.270884 2008-03-03 8.13 -1 -0.003676 0.266211 2008-03-10 6.77 -1 -0.073871 0.172675 2008-03-17 6.16 -1 0.004894 0.178414 2008-03-24 6.53 -1 -0.064470 0.102441 2008-03-31 6.94 -1 -0.029371 0.070062 2008-04-07 7.39 -1 0.024965 0.096776 2008-04-14 6.32 -1 -0.099715 -0.012589 2008-04-21 5.52 -1 -0.019538 -0.031881 2008-04-28 6.86 -1 -0.002907 -0.034695 2008-05-05 7.29 -1 0.000000 -0.034695 2008-05-12 6.61 -1 0.029595 -0.006127 2008-05-19 6.90 -1 0.010249 0.004059 2008-05-26 6.12 -1 -0.025478 -0.021522 2008-06-02 6.37 -1 0.025765 0.003688 2008-06-16 5.31 -1 0.017241 0.020993 2008-06-23 5.28 -1 0.021277 0.042717 2008-06-30 4.76 -1 -0.006263 0.036186 2008-07-07 5.01 -1 0.068230 0.106885 2008-07-14 5.21 -1 0.011650 0.119781 2008-07-21 4.90 -1 0.027254 0.150299 2008-07-28 5.37 -1 0.034682 0.190194 2008-08-04 5.28 -1 -0.020408 0.165904 2008-08-11 4.75 -1 -0.036511 0.123336 2008-08-18 4.69 -1 -0.028986 0.090775 2008-08-25 4.96 -1 0.012245 0.104132 2008-09-01 4.67 -1 -0.060362 0.037484 2008-09-08 4.35 -1 -0.031180 0.005135 2008-09-22 3.96 -1 0.100000 0.105648 2008-10-06 3.42 -1 -0.073171 0.024747 2008-10-13 3.27 -1 0.101010 0.128257 2008-10-20 3.34 -1 0.050314 0.185025 2008-10-27 2.67 -1 -0.097973 0.068924 2008-11-03 2.70 -1 0.003717 0.072898 2008-11-10 3.10 -1 0.099291 0.179427 2008-11-17 3.54 -1 0.038123 0.224390 2008-11-24 3.14 -1 -0.045593 0.168567 2008-12-01 2.93 -1 0.013841 0.184741 2008-12-08 3.48 -1 0.051360 0.245589 2008-12-15 3.28 -1 -0.003040 0.241803 2008-12-22 3.31 -1 -0.020710 0.216085 2008-12-29 3.04 -1 -0.025641 0.184903 2009-01-05 3.12 -1 0.026316 0.216085 2009-01-12 3.17 -1 0.003165 0.219933 2009-01-19 3.57 -1 0.046921 0.277174 2009-02-02 3.74 -1 0.000000 0.277174 2009-02-09 4.42 -1 0.042453 0.331393 2009-02-16 4.61 -1 0.054920 0.404513 2009-02-23 4.81 -1 0.098174 0.542399 2009-03-02 4.50 -1 0.015801 0.566771 2009-03-09 4.71 -1 -0.020790 0.534198 2009-03-16 4.90 -1 0.029412 0.579321 2009-03-23 5.01 -1 0.018293 0.608211 2009-03-30 5.15 -1 -0.020913 0.574580 2009-04-13 5.38 -1 0.009381 0.589351 2009-04-20 5.18 -1 0.015686 0.614282 2009-04-27 4.86 -1 -0.012195 0.594595 2009-05-04 5.38 -1 0.026718 0.637199 2009-05-11 5.67 -1 -0.029110 0.589541 2009-05-18 5.62 -1 0.000000 0.589541 2009-05-25 5.51 -1 0.003643 0.595331 2009-06-01 5.88 -1 0.026178 0.637094 2009-06-08 6.42 -1 0.000000 0.637094 2009-06-15 7.06 -1 0.099688 0.800293 2009-06-22 7.09 -1 0.000000 0.800293 2009-06-29 6.94 -1 0.000000 0.800293 2009-07-06 7.67 -1 0.011873 0.821669 2009-07-13 7.11 -1 -0.028689 0.769408 2009-07-20 7.60 -1 0.007958 0.783488 2009-07-27 7.42 -1 0.017833 0.815292 2009-08-03 8.30 -1 -0.013080 0.791549 2009-08-10 7.37 -1 -0.025132 0.746523 2009-08-17 6.81 -1 -0.065844 0.631526 2009-08-24 7.04 -1 -0.007052 0.620020 2009-08-31 5.84 -1 -0.050407 0.538360 2009-09-07 6.68 -1 0.003003 0.542980 2009-09-14 7.06 -1 0.008571 0.556206 2009-09-21 6.56 -1 -0.003040 0.551476 2009-09-28 6.24 -1 -0.035549 0.496323 2009-10-12 6.74 -1 -0.002959 0.491896 2009-10-19 7.08 -1 0.035088 0.544243 2009-10-26 7.32 -1 0.000000 0.544243 2009-11-02 7.94 -1 0.099723 0.698239 2009-11-09 7.98 -1 -0.009926 0.681383 2009-11-16 8.42 -1 0.031863 0.734957 2009-11-23 8.20 -1 -0.002433 0.730736 2009-11-30 7.79 -1 0.040053 0.800057 2009-12-07 8.14 -1 0.002463 0.804491 2009-12-14 8.19 -1 0.021197 0.842741 2009-12-21 7.57 -1 -0.014323 0.816348 2009-12-28 7.48 -1 0.000000 0.816348 2010-01-04 7.61 -1 -0.028097 0.765313 2010-01-11 7.26 -1 0.000000 0.765313 2010-01-18 6.89 -1 0.001453 0.767879 2010-01-25 7.13 -1 -0.037787 0.701077 2010-02-01 6.82 -1 -0.021521 0.664468 2010-02-08 6.92 -1 -0.019830 0.631462 2010-02-22 7.10 -1 -0.015257 0.606571 2010-03-01 7.21 -1 0.000000 0.606571 2010-03-08 7.66 -1 0.025435 0.647435 2010-03-15 7.19 -1 -0.023098 0.609382 2010-03-22 7.43 -1 0.004054 0.615907 2010-03-29 7.57 -1 0.034153 0.671095 2010-04-12 7.09 -1 -0.026099 0.627481 2010-04-19 6.45 -1 -0.087694 0.484760 2010-04-26 6.40 -1 -0.010819 0.468696 2010-05-10 5.92 -1 0.010239 0.483734 2010-05-17 5.60 -1 -0.049236 0.410681 2010-05-24 5.91 -1 0.033217 0.457539 2010-05-31 5.62 -1 -0.032702 0.409875 2010-06-07 5.43 -1 -0.023381 0.376910 2010-06-21 5.88 -1 0.057554 0.456156 2010-06-28 5.94 -1 0.020619 0.486180 2010-07-05 5.62 -1 0.000000 0.486180 2010-07-12 5.62 -1 0.000000 0.486180 2010-07-19 5.62 -1 0.000000 0.486180 2010-07-26 5.62 -1 0.000000 0.486180 2010-08-02 5.62 -1 0.000000 0.486180 2010-08-09 5.62 -1 0.000000 0.486180 2010-08-16 5.62 -1 0.000000 0.486180 2010-08-23 5.62 -1 0.000000 0.486180 2010-08-30 5.62 -1 0.000000 0.486180 2010-09-06 5.84 -1 0.024561 0.522683 2010-09-13 5.49 -1 -0.005435 0.514408 2010-09-20 5.36 -1 0.001869 0.517238 2010-09-27 5.36 -1 0.005629 0.525778 2010-10-11 5.79 -1 0.047016 0.597514 2010-10-18 6.16 -1 0.001626 0.600112 2010-10-25 6.07 -1 0.020168 0.632383 2010-11-01 5.96 -1 0.008460 0.646193 2010-11-08 6.15 -1 0.011513 0.665146 2010-11-15 5.56 -1 0.007246 0.677213 2010-11-22 5.36 -1 -0.018315 0.646494 2010-11-29 5.37 -1 0.001866 0.649566 2010-12-06 5.38 -1 0.011278 0.668170 2010-12-13 5.34 -1 0.017143 0.696768 2010-12-20 5.18 -1 -0.013333 0.674144 2010-12-27 5.16 -1 -0.022727 0.636095 2011-01-10 5.13 -1 -0.026565 0.592632 2011-01-17 4.94 -1 -0.037037 0.533645 2011-01-24 4.83 -1 -0.006173 0.524178 2011-01-31 4.92 -1 0.008197 0.536672 2011-02-14 5.14 -1 0.032129 0.586043 2011-02-21 5.13 -1 0.000000 0.586043 2011-02-28 5.12 -1 0.003922 0.592262 2011-03-07 5.38 -1 0.003731 0.598204 2011-03-14 5.19 -1 0.007767 0.610617 2011-03-21 5.06 -1 -0.003937 0.604276 2011-03-28 5.24 -1 0.003831 0.610423 2011-04-11 5.47 -1 -0.007260 0.598732 2011-04-18 6.06 -1 0.008319 0.612032 2011-04-25 5.81 -1 0.012195 0.631691 2011-05-09 5.63 -1 0.000000 0.631691 2011-05-16 5.51 -1 -0.028219 0.585647 2011-05-23 5.75 -1 -0.023769 0.547958 2011-05-30 5.64 -1 -0.001770 0.545218 2011-06-13 5.24 -1 -0.013183 0.524848 2011-06-20 5.14 -1 0.007843 0.536807 2011-06-27 5.49 -1 0.005495 0.545251 2011-07-04 5.64 -1 0.036765 0.602062 2011-07-11 5.59 -1 -0.007105 0.590680 2011-07-18 5.76 -1 -0.003460 0.585176 2011-07-25 5.42 -1 -0.019892 0.553644 2011-08-01 5.52 -1 -0.008977 0.539698 2011-08-08 5.14 -1 -0.017208 0.513202 2011-08-15 5.50 -1 0.029963 0.558541 2011-08-22 5.27 -1 -0.011257 0.540997 2011-08-29 5.37 -1 -0.037634 0.483002 2011-09-05 5.28 -1 -0.029412 0.439384 2011-09-19 5.33 -1 -0.023810 0.405113 2011-09-26 5.15 -1 -0.035581 0.355119 2011-10-10 4.98 -1 -0.033010 0.310387 2011-10-17 5.31 -1 0.011429 0.325362 2011-10-24 5.31 -1 0.031068 0.366539 2011-10-31 5.42 -1 -0.009141 0.354048 2011-11-07 5.37 -1 -0.014679 0.334172 2011-11-14 5.37 -1 0.009398 0.346711 2011-11-21 5.12 -1 0.000000 0.346711 2011-11-28 5.07 -1 0.000000 0.346711 2011-12-05 5.12 -1 0.000000 0.346711 2011-12-12 5.09 -1 0.000000 0.346711 2011-12-19 4.93 -1 0.004073 0.352196 2011-12-26 4.95 -1 0.000000 0.352196 2012-01-09 5.07 -1 0.028398 0.390596 2012-01-16 5.07 -1 0.000000 0.390596 2012-01-30 5.37 -1 -0.003711 0.385436 2012-02-06 5.40 -1 -0.010989 0.370211 2012-02-13 5.36 -1 -0.012891 0.352547 2012-02-20 5.28 -1 0.000000 0.352547 2012-02-27 5.43 -1 0.001845 0.355043 2012-03-05 5.55 -1 -0.010695 0.340550 2012-03-12 5.36 -1 -0.011070 0.325710 2012-03-19 5.25 -1 -0.003795 0.320679 2012-03-26 5.15 -1 0.001946 0.323248 2012-04-09 5.06 -1 -0.013645 0.305192 2012-04-16 5.20 -1 -0.005736 0.297706 2012-04-23 5.27 -1 -0.009398 0.285509 2012-05-07 5.33 -1 -0.007449 0.275934 2012-05-14 5.12 -1 -0.003891 0.270969 2012-05-21 5.06 -1 0.001980 0.273486 2012-05-28 5.08 -1 0.011952 0.288707 2012-06-04 4.95 -1 -0.023669 0.258205 2012-06-11 4.75 -1 -0.002101 0.255561 2012-06-18 4.88 -1 0.002053 0.258140 2012-06-25 4.74 -1 -0.008368 0.247611 2012-07-02 4.86 -1 -0.002053 0.245049 2012-07-09 4.72 -1 -0.028807 0.209184 2012-07-16 4.77 -1 -0.008316 0.199128 2012-07-23 4.76 -1 -0.002096 0.196614 2012-07-30 4.77 -1 0.006329 0.204188 2012-08-06 4.85 -1 -0.002058 0.201710 2012-08-13 4.83 -1 -0.002066 0.199227 2012-08-20 4.77 -1 -0.014463 0.181883 2012-08-27 4.53 -1 -0.017354 0.161373 2012-09-03 4.56 -1 0.000000 0.161373 2012-09-10 4.52 -1 -0.008772 0.151186 2012-09-17 4.40 -1 -0.024390 0.123108 2012-09-24 4.15 -1 0.002415 0.125821 2012-10-08 4.16 -1 -0.014218 0.109814 2012-10-15 4.21 -1 -0.014052 0.094219 2012-10-22 4.36 -1 0.004608 0.099262 2012-10-29 4.19 -1 0.002392 0.101892 2012-11-05 4.40 -1 0.004566 0.106923 2012-11-12 4.41 -1 0.016129 0.124777 2012-11-19 4.23 -1 -0.002358 0.122124 2012-11-26 4.25 -1 -0.009324 0.111661 2012-12-03 4.06 -1 -0.019324 0.090180 2012-12-10 4.63 -1 0.019824 0.111791 2012-12-17 4.92 -1 0.002037 0.114056 2012-12-24 4.83 -1 0.004158 0.118688 2012-12-31 5.18 -1 0.025743 0.147486 2013-01-07 5.27 -1 0.019342 0.169681 2013-01-14 5.53 -1 0.099404 0.285951 2013-01-21 6.37 -1 0.074199 0.381368 2013-01-28 6.82 -1 0.100000 0.519504 2013-02-04 7.12 -1 -0.019284 0.490203 2013-02-18 6.76 -1 0.007452 0.501307 2013-02-25 6.47 -1 0.045234 0.569217 2013-03-04 7.04 -1 -0.056300 0.480870 2013-03-11 7.32 -1 -0.010811 0.464861 2013-03-18 6.91 -1 -0.037604 0.409775 2013-03-25 7.36 -1 -0.012081 0.392745 2013-04-01 6.60 -1 0.013825 0.411999 2013-04-08 6.45 -1 -0.025680 0.375739 2013-04-15 6.00 -1 -0.018003 0.350971 2013-04-22 6.54 -1 -0.001527 0.348909 2013-05-06 6.57 -1 0.029781 0.389080 2013-05-13 6.44 -1 -0.013783 0.369935 2013-05-20 6.79 -1 0.028788 0.409373 2013-05-27 6.61 -1 -0.011958 0.392519 2013-06-03 6.76 -1 -0.004418 0.386367 2013-06-17 6.22 -1 0.008104 0.397601 2013-06-24 5.30 -1 -0.100170 0.257604 2013-07-01 5.09 -1 -0.023033 0.228638 2013-07-08 4.70 -1 -0.040816 0.178490 2013-07-15 5.49 -1 0.016667 0.198131 2013-07-22 4.92 -1 -0.002028 0.195701 2013-07-29 4.92 -1 -0.023810 0.167232 2013-08-05 5.19 -1 0.011696 0.180884 2013-08-12 5.40 -1 0.048544 0.238208 2013-08-19 5.64 -1 0.019892 0.262838 2013-08-26 5.70 -1 0.027027 0.296969 2013-09-02 5.62 -1 0.014440 0.315697 2013-09-09 6.34 -1 0.100694 0.448181 2013-09-16 6.90 -1 0.000000 0.448181 2013-09-23 6.73 -1 0.007485 0.459020 2013-09-30 6.21 -1 -0.001608 0.456675 2013-10-14 6.53 -1 -0.015083 0.434704 2013-10-21 6.44 -1 0.010989 0.450470 2013-10-28 6.86 -1 -0.022792 0.417411 2013-11-04 7.09 -1 -0.022069 0.386130 2013-11-11 7.00 -1 0.004304 0.392096 2013-11-18 7.36 -1 0.054441 0.467883 2013-11-25 7.05 -1 -0.012605 0.449381 2013-12-02 7.18 -1 0.009845 0.463650 2013-12-09 6.89 -1 -0.007205 0.453105 2013-12-16 6.66 -1 0.015244 0.475256 2013-12-23 6.24 -1 0.003215 0.480000 2013-12-30 6.13 -1 -0.001629 0.477589 2014-01-06 6.10 -1 -0.020867 0.446757 2014-01-13 6.06 -1 -0.019417 0.418664 2014-01-20 5.90 -1 -0.016667 0.395020 2014-01-27 5.95 -1 -0.022989 0.362951 2014-02-10 6.05 -1 0.016807 0.385857 2014-02-17 6.25 -1 -0.009509 0.372680 2014-02-24 5.83 -1 -0.037954 0.320581 2014-03-03 5.77 -1 -0.008591 0.309236 2014-03-10 5.39 -1 -0.044326 0.251203 2014-03-17 5.47 -1 0.014842 0.269773 2014-03-24 5.64 -1 0.000000 0.269773 2014-03-31 5.63 -1 0.000000 0.269773 2014-04-14 5.89 -1 -0.011745 0.254860 2014-04-21 5.59 -1 -0.008865 0.243735 2014-04-28 5.76 -1 -0.020408 0.218353 2014-05-05 5.74 -1 -0.013746 0.201606 2014-05-12 5.93 -1 0.027730 0.234926 2014-05-19 5.89 -1 0.000000 0.234926 2014-05-26 6.05 -1 0.000000 0.234926 2014-06-09 6.00 -1 0.008403 0.245303 2014-06-16 6.44 -1 0.001555 0.247240 2014-06-23 6.21 -1 -0.007987 0.237278 2014-06-30 6.30 -1 0.009615 0.249175 2014-07-07 6.27 -1 -0.004762 0.243226 2014-07-14 6.18 -1 0.004878 0.249291 2014-07-21 6.07 -1 -0.004918 0.243147 2014-07-28 6.85 -1 0.053846 0.310086 2014-08-04 6.95 -1 0.022059 0.338985 2014-08-11 6.81 -1 0.016418 0.360968 2014-08-18 6.77 -1 0.005944 0.369057 2014-08-25 6.49 -1 -0.013678 0.350331 2014-09-01 6.55 -1 0.004601 0.356544 2014-09-15 6.55 -1 -0.006070 0.348310 2014-09-22 6.39 -1 -0.031818 0.305410 2014-09-29 6.43 -1 0.000000 0.305410 2014-10-13 6.42 -1 -0.006192 0.297327 2014-10-20 6.46 -1 0.004666 0.303379 2014-10-27 6.37 -1 -0.015456 0.283234 2014-11-03 7.06 -1 0.007133 0.292387 2014-11-10 7.08 -1 0.021645 0.320361 2014-11-17 6.84 -1 -0.015827 0.299463 2014-11-24 6.85 -1 -0.002911 0.295680 2014-12-01 7.75 -1 -0.020228 0.269472 2014-12-08 9.68 -1 0.047619 0.329923 2014-12-15 8.63 -1 -0.025959 0.295399 2014-12-22 9.75 -1 0.023085 0.325303 2014-12-29 9.48 -1 -0.012500 0.308737 2015-01-05 10.18 -1 0.010924 0.323033 2015-01-12 9.39 -1 -0.020855 0.295441 2015-01-19 8.79 -1 -0.100307 0.165499 2015-01-26 9.12 -1 -0.003279 0.161678 2015-02-02 8.66 -1 -0.021469 0.136738 2015-02-09 8.59 -1 0.000000 0.136738 2015-02-16 8.85 -1 -0.002255 0.134175 2015-03-02 8.92 -1 0.003375 0.138002 2015-03-09 8.99 -1 0.052693 0.197967 2015-03-16 9.80 -1 0.028332 0.231907 2015-03-23 9.81 -1 0.007187 0.240761 2015-03-30 9.95 -1 0.037539 0.287338 2015-04-13 12.73 -1 0.011120 0.301653 2015-04-20 12.54 -1 -0.037606 0.252704 2015-04-27 12.63 -1 0.016908 0.273885 2015-05-04 12.71 -1 -0.010895 0.260006 2015-05-11 12.33 -1 0.010656 0.273432 2015-05-18 11.68 -1 -0.017662 0.250941 2015-05-25 12.77 -1 0.019968 0.275920 2015-06-01 12.23 -1 0.037320 0.323537 2015-06-08 13.30 -1 0.060606 0.403751 2015-06-15 12.25 -1 -0.035433 0.354012 2015-06-29 10.43 -1 -0.016038 0.332297 2015-07-06 10.68 -1 0.061630 0.414406 2015-07-13 11.11 -1 -0.027997 0.374808 2015-07-20 10.46 -1 -0.015992 0.352821 2015-07-27 9.57 -1 -0.070874 0.256942 2015-08-03 9.86 -1 0.036803 0.303201 2015-08-10 9.94 -1 0.024742 0.335446 2015-08-17 9.65 -1 -0.008222 0.324466 2015-08-24 7.96 -1 -0.100565 0.191271 2015-08-31 8.52 -1 0.022809 0.218443 2015-09-07 8.38 -1 -0.080132 0.120807 2015-09-14 8.36 -1 -0.008304 0.111500 2015-09-21 8.33 -1 0.001202 0.112836 2015-09-28 8.10 -1 -0.002463 0.110095 2015-10-12 8.64 -1 0.029797 0.143173 2015-10-19 8.66 -1 0.002315 0.145819 2015-10-26 8.86 -1 0.003398 0.149712 2015-11-02 8.57 -1 -0.019451 0.127349 2015-11-09 9.96 -1 0.045121 0.178216 2015-11-16 9.50 -1 0.008493 0.188222 2015-11-23 9.58 -1 -0.008282 0.178382 2015-11-30 9.03 -1 0.000000 0.178382 2015-12-07 9.35 -1 0.002144 0.180908 2015-12-14 9.29 -1 0.020879 0.205564 2015-12-21 9.63 -1 0.023379 0.233749 2015-12-28 9.22 -1 -0.034555 0.191117 2016-01-04 8.72 -1 -0.055255 0.125302 2016-01-11 8.28 -1 -0.032710 0.088493 2016-01-18 8.01 -1 -0.004969 0.083085 2016-01-25 7.98 -1 -0.002500 0.080377 2016-02-01 7.54 -1 -0.019506 0.059303 2016-02-15 7.53 -1 -0.013106 0.045420 2016-02-22 7.92 -1 0.024580 0.071116 2016-02-29 7.36 -1 -0.022576 0.046934 2016-03-07 7.96 -1 -0.005000 0.041699 2016-03-14 7.89 -1 0.008951 0.051024 2016-03-21 8.31 -1 0.024661 0.076943 2016-03-28 8.06 -1 -0.011043 0.065051 2016-04-11 8.25 -1 0.014760 0.080771 2016-04-18 8.26 -1 -0.013142 0.066567 2016-04-25 8.08 -1 -0.004926 0.061313 2016-05-09 7.96 -1 -0.016069 0.044259 2016-05-16 7.97 -1 0.001256 0.045571 2016-05-23 7.91 -1 -0.002522 0.042934 2016-05-30 7.91 -1 0.001266 0.044254 2016-06-06 8.09 -1 0.001238 0.045546 2016-06-13 7.95 -1 -0.016089 0.028724 2016-06-20 8.06 -1 0.002488 0.031283 2016-06-27 8.07 -1 0.004981 0.036420 2016-07-04 8.26 -1 0.012255 0.049122 2016-07-11 8.20 -1 0.001221 0.050403 2016-07-18 8.47 -1 0.005938 0.056640 2016-07-25 8.42 -1 0.004773 0.061684 2016-08-01 8.70 -1 0.009281 0.071537 2016-08-08 8.54 -1 0.008264 0.080393 2016-08-15 9.07 -1 0.019101 0.101029 2016-08-22 8.81 -1 -0.011223 0.088672 2016-08-29 8.83 -1 -0.003386 0.084986 2016-09-05 8.83 -1 -0.003386 0.081312 2016-09-12 8.58 -1 -0.023891 0.055479 2016-09-19 8.55 -1 0.007067 0.062938 2016-09-26 8.47 -1 -0.011669 0.050535 2016-10-10 8.55 -1 0.005882 0.056715 2016-10-17 8.48 -1 -0.004695 0.051753 2016-10-24 8.66 -1 0.011682 0.064040 2016-10-31 8.57 -1 -0.002328 0.061563 2016-11-07 8.55 -1 0.001171 0.062806 2016-11-14 8.64 -1 0.004651 0.067749 2016-11-21 8.66 -1 0.006977 0.075199 2016-11-28 9.02 -1 0.001110 0.076392 2016-12-05 8.86 -1 -0.010056 0.065568 2016-12-12 8.90 -1 -0.015487 0.049066 2016-12-19 8.62 -1 -0.005767 0.043016 2016-12-26 8.55 -1 0.004700 0.047918 2017-01-09 8.57 -1 0.001168 0.049143 2017-01-16 8.57 -1 -0.001166 0.047920 2017-01-23 8.64 -1 0.000000 0.047920 2017-02-06 8.72 -1 0.004608 0.052749 2017-02-13 8.82 -1 0.009153 0.062385 2017-02-20 8.96 -1 0.018182 0.081701 2017-02-27 8.84 -1 -0.006742 0.074409 2017-03-06 8.86 -1 0.005675 0.080506 2017-03-13 8.85 -1 0.004540 0.085412 2017-03-20 8.67 -1 -0.005734 0.079189 2017-03-27 8.57 -1 -0.004646 0.074175 2017-04-10 8.60 -1 -0.002320 0.071683 2017-04-17 8.53 -1 0.002350 0.074201 2017-04-24 8.37 -1 -0.004756 0.069092 2017-05-08 8.03 -1 -0.007417 0.061163 2017-05-15 8.30 -1 -0.004796 0.056074 2017-05-22 8.13 -1 -0.001229 0.054776 2017-06-05 8.46 -1 -0.015134 0.038813 2017-06-12 8.54 -1 -0.003501 0.035177 2017-06-19 8.56 -1 0.013018 0.048653 2017-06-26 8.71 -1 0.004614 0.053491 2017-07-03 8.81 -1 0.001136 0.054688 2017-07-10 8.99 -1 0.013529 0.068956 2017-07-17 10.13 -1 -0.007835 0.060581 2017-07-24 10.41 -1 0.005797 0.066729 2017-07-31 10.14 -1 -0.006856 0.059415 2017-08-07 10.46 -1 -0.015066 0.043454 2017-08-14 9.72 -1 0.019937 0.064258 2017-08-21 9.94 -1 0.001007 0.065330 2017-08-28 10.79 -1 0.021780 0.088533 2017-09-04 11.14 -1 0.045028 0.137547 2017-09-11 10.82 -1 -0.009158 0.127130 2017-09-18 10.70 -1 -0.002796 0.123979 2017-09-25 10.73 -1 -0.013787 0.108483 2017-10-09 10.74 -1 0.017045 0.127377 2017-10-16 11.02 -1 0.020370 0.150343 2017-10-23 10.64 -1 -0.024748 0.121874 2017-10-30 10.99 -1 0.000000 0.121874 2017-11-06 10.72 -1 -0.010157 0.110479 2017-11-13 12.26 -1 0.048760 0.164626 2017-11-20 13.55 -1 0.081405 0.259432 2017-11-27 13.24 -1 -0.043353 0.204832 2017-12-04 12.64 -1 0.022654 0.232126 2017-12-11 12.83 -1 0.031350 0.270754 2017-12-18 12.12 -1 0.002481 0.273907 2017-12-25 12.60 -1 -0.019455 0.249123 2018-01-08 12.32 -1 -0.025316 0.217499 2018-01-15 13.50 -1 0.048137 0.276106 2018-01-22 13.73 -1 -0.024165 0.245269 2018-01-29 13.06 -1 -0.022455 0.217306 2018-02-05 13.83 -1 0.035180 0.260130 2018-02-12 11.14 -1 0.002700 0.263533 2018-02-26 12.01 -1 0.001668 0.265641 2018-03-05 11.28 -1 -0.007042 0.256728 2018-03-12 11.44 -1 -0.004352 0.251259 2018-03-19 11.25 -1 0.016260 0.271605 2018-03-26 10.39 -1 -0.036178 0.225600 2018-04-02 10.18 -1 -0.017375 0.204306 2018-04-09 10.48 -1 0.014521 0.221794 2018-04-16 10.55 -1 -0.040909 0.171811 2018-04-23 11.00 -1 0.019462 0.194618 2018-05-07 10.28 -1 0.012808 0.209918 2018-05-14 10.63 -1 0.015282 0.228408 2018-05-21 10.41 -1 -0.000960 0.227229 2018-05-28 10.07 -1 0.000000 0.227229 2018-06-04 9.76 -1 0.007224 0.236094 2018-06-11 9.54 -1 -0.008316 0.225815 2018-06-25 8.99 -1 -0.039530 0.177359 2018-07-02 8.19 -1 -0.052083 0.116038 2018-07-09 8.58 -1 0.042527 0.163500 2018-07-16 8.43 -1 -0.016336 0.144493 2018-07-23 9.09 -1 0.034130 0.183554 2018-07-30 9.06 -1 0.014558 0.200784 2018-08-06 8.63 -1 0.003488 0.204973 2018-08-13 8.74 -1 -0.019080 0.181982 2018-08-20 8.69 -1 0.022353 0.208403 2018-08-27 10.07 -1 0.040289 0.257089 2018-09-03 9.84 -1 0.006135 0.264801 2018-09-10 9.54 -1 -0.012422 0.249089 2018-09-17 9.35 -1 -0.015789 0.229367 2018-10-08 10.09 -1 -0.054358 0.162541 2018-10-15 9.76 -1 -0.018109 0.141489 2018-10-22 10.76 -1 0.035611 0.182138 2018-10-29 10.38 -1 -0.037998 0.137219 2018-11-05 10.54 -1 -0.014953 0.120214 2018-11-12 10.19 -1 0.000982 0.121315 2018-11-19 10.47 -1 0.026471 0.150996 2018-11-26 9.98 -1 0.002008 0.153308 2018-12-03 10.22 -1 0.022000 0.178680 2018-12-10 9.82 -1 -0.010081 0.166799 2018-12-17 9.93 -1 0.011202 0.179869 2018-12-24 9.09 -1 -0.003289 0.175987 2019-01-07 9.40 -1 -0.001063 0.174738 2019-01-14 9.76 -1 -0.009137 0.164004 2019-01-21 9.98 -1 -0.008937 0.153601 2019-01-28 10.56 -1 -0.005650 0.147083 2019-02-11 10.82 -1 0.000925 0.148144 2019-02-18 10.97 -1 0.037843 0.191594 2019-02-25 12.11 -1 0.087074 0.295350 2019-03-04 12.54 -1 0.017857 0.318481 2019-03-11 11.89 -1 0.001685 0.320703 2019-03-18 12.46 -1 0.032312 0.363377 2019-03-25 11.69 -1 -0.037860 0.311759 2019-04-01 12.72 -1 0.028294 0.348874 2019-04-08 13.47 -1 0.006726 0.357948 2019-04-15 13.21 -1 0.020077 0.385211 2019-04-22 13.66 -1 -0.039381 0.330660 2019-04-29 13.61 -1 0.022539 0.360653 2019-05-06 12.42 -1 -0.071055 0.263972 2019-05-13 11.87 -1 -0.030229 0.225764 2019-05-20 11.95 -1 -0.004996 0.219640 2019-05-27 11.94 -1 0.001678 0.221686 2019-06-03 11.49 -1 -0.022959 0.193637 2019-06-10 11.91 -1 0.034752 0.235119 2019-06-17 12.23 -1 0.014096 0.252530 2019-06-24 13.21 -1 0.003037 0.256334 2019-07-01 13.59 -1 0.011161 0.270355 2019-07-08 13.26 -1 -0.023564 0.240421 2019-07-15 13.66 -1 -0.007988 0.230512 2019-07-22 13.51 -1 -0.010256 0.217891 2019-07-29 13.94 -1 0.004323 0.223156 2019-08-05 13.02 -1 -0.028358 0.188469 2019-08-12 14.75 -1 0.041667 0.237989 2019-08-19 14.55 -1 0.001376 0.239693 2019-08-26 13.90 -1 -0.027292 0.205859 2019-09-02 14.09 -1 0.020275 0.230308 2019-09-09 14.33 -1 -0.008304 0.220091 2019-09-16 14.09 -1 -0.016061 0.200495 2019-09-23 15.00 -1 0.002674 0.203705 2019-09-30 15.21 -1 -0.019342 0.180422 2019-10-14 16.80 -1 0.024390 0.209213 2019-10-21 16.47 -1 0.022981 0.237002 2019-10-28 16.25 -1 -0.012758 0.221220 2019-11-04 16.50 -1 0.003040 0.224932 2019-11-11 15.88 -1 -0.022167 0.197779 2019-11-18 16.05 -1 0.006901 0.206044 2019-11-25 15.41 -1 0.013149 0.221903 2019-12-02 14.98 -1 0.004695 0.227640 2019-12-09 15.03 -1 -0.012484 0.212314 2019-12-16 15.73 -1 0.000636 0.213085 2019-12-23 15.84 -1 -0.021014 0.187594 2019-12-30 16.16 -1 -0.003699 0.183201 2020-01-06 16.65 -1 -0.006563 0.175435 2020-01-13 16.57 -1 0.017813 0.196374 2020-01-20 16.05 -1 0.003752 0.200863 2020-02-03 13.65 -1 -0.099604 0.081252 2020-02-10 14.14 -1 -0.008415 0.072153 2020-02-17 14.99 -1 0.022510 0.096287 2020-02-24 14.86 -1 -0.022368 0.071765 2020-03-02 14.43 -1 0.020509 0.093746 2020-03-09 14.09 -1 -0.038881 0.051220 2020-03-16 13.41 -1 -0.052966 -0.004459 2020-03-23 11.85 -1 -0.029484 -0.033812 2020-03-30 12.62 -1 -0.016368 -0.049626 2020-04-13 12.28 -1 -0.016026 -0.064856 2020-04-20 12.67 -1 0.007955 -0.057417 2020-04-27 13.17 -1 0.020139 -0.038434 2020-05-11 13.66 -1 0.003674 -0.034901 2020-05-18 12.88 -1 -0.001550 -0.036398 2020-05-25 12.64 -1 0.003175 -0.033338 2020-06-01 13.22 -1 0.024806 -0.009359 2020-06-08 13.51 -1 0.002226 -0.007155 2020-06-15 12.72 -1 -0.013189 -0.020249 2020-06-22 12.54 -1 -0.012598 -0.032592 2020-06-29 12.70 -1 0.000000 -0.032592 2020-07-06 15.56 -1 0.100424 0.064559 2020-07-13 14.77 -1 0.002035 0.066726 2020-07-20 14.62 -1 0.042053 0.111585 2020-07-27 13.14 -1 -0.018671 0.090831 2020-08-03 13.48 -1 0.018127 0.110604 2020-08-10 13.84 -1 0.018396 0.131035 2020-08-17 15.07 -1 0.049443 0.186956 2020-08-24 14.35 -1 0.000697 0.187784 2020-08-31 14.96 -1 -0.003331 0.183827 2020-09-07 14.82 -1 -0.001348 0.182232 2020-09-14 15.18 -1 0.019476 0.205257 2020-09-21 15.74 -1 -0.012547 0.190135 2020-09-28 15.19 -1 0.007963 0.199612 2020-10-12 15.78 -1 0.047809 0.256963 2020-10-19 17.34 -1 0.021803 0.284369 2020-10-26 17.56 -1 -0.023902 0.253670 2020-11-02 17.49 -1 -0.006814 0.245127 2020-11-09 17.70 -1 0.011429 0.259357 2020-11-16 17.23 -1 0.010557 0.272652 2020-11-23 19.47 -1 0.040620 0.324348 2020-11-30 19.59 -1 0.002046 0.327057 2020-12-07 18.76 -1 -0.020366 0.300031 2020-12-14 18.73 -1 0.019042 0.324787 2020-12-21 18.14 -1 -0.004391 0.318970 2020-12-28 18.70 -1 0.044693 0.377918 2021-01-04 18.45 -1 -0.038562 0.324783 2021-01-11 20.22 -1 0.026396 0.359752 2021-01-18 22.52 -1 0.080614 0.469368 2021-01-25 22.31 -1 0.020586 0.499615 2021-02-01 24.36 -1 0.063291 0.594528 2021-02-08 24.61 -1 -0.005255 0.586149 2021-02-22 22.21 -1 -0.061285 0.488942 2021-03-01 21.28 -1 0.003300 0.493856 open close high low volume \ count 769.000000 769.000000 769.000000 769.000000 7.690000e+02 mean 7.555306 7.569545 7.690988 7.438713 1.111485e+08 std 4.079289 4.102257 4.170083 4.015496 9.108665e+07 min 1.200000 1.190000 1.210000 1.170000 0.000000e+00 25% 5.090000 5.120000 5.150000 5.050000 5.287571e+07 50% 6.920000 6.860000 6.990000 6.740000 9.046336e+07 75% 9.630000 9.650000 9.850000 9.480000 1.388514e+08 max 24.710000 24.610000 24.800000 23.910000 7.024621e+08 money weekday buy_signal sell_signal signal profit_pct \ count 7.690000e+02 769.0 769.0 769.0 769.0 769.000000 mean 9.470058e+08 0.0 0.0 -1.0 -1.0 0.000930 std 1.050995e+09 0.0 0.0 0.0 0.0 0.028641 min 0.000000e+00 0.0 0.0 -1.0 -1.0 -0.101523 25% 3.240256e+08 0.0 0.0 -1.0 -1.0 -0.013605 50% 6.230258e+08 0.0 0.0 -1.0 -1.0 0.000000 75% 1.200912e+09 0.0 0.0 -1.0 -1.0 0.013514 max 8.596942e+09 0.0 0.0 -1.0 -1.0 0.101010 cum_profit count 769.000000 mean 0.226495 std 0.235805 min -0.274237 25% 0.074175 50% 0.216085 75% 0.362951 max 0.842741

3回答

DeltaF 2022-01-05 14:07:06

收盘价有可能不同，因为复权价格

默认值前复权，前复权的话就是从后往前推，也就是说按现在的价格倒退原始价格，倒退的原因是为了消除分红拆分股权等对价格的影响

1 回复有任何疑惑可以回复我~

收起回答

奉化奔腾JAVA #1

我取出来的收盘价也跟这位童鞋一样，想问一下，我们取出来的数据到底是否可信？

回复有任何疑惑可以回复我~ 2022-03-29 10:27:51

weixin_慕圣7555940 #2

这个从代码上要怎么调整呢，都JQData上获取的数据，理论上应该是一样的

回复有任何疑惑可以回复我~ 2022-08-08 23:06:50

二位取根 #3

是因为直接使用data.loc[data['signal'] != 0, 'profit_pct'] = data['close'].pct_change()是有问题的，这行代码会在data DataFrame 中，对于所有signal列不为0的行，将profit_pct列的值设置为close列的百分比变化。这意味着，即使data DataFrame 中存在signal为0的行，这些行的profit_pct值不会被改变。
而因该使用
data = data[data['signal'] != 0]  # 筛选买入和卖出的数据  
data.loc[data['signal'] != 0, 'profit_pct'] = data['close'].pct_change()

这两行代码首先会筛选出data DataFrame 中所有signal不为0的行，并将其赋值回data。然后，它会在筛选后的data DataFrame 中，对于所有signal列不为0的行，将profit_pct列的值设置为close列的百分比变化。

由于第二段代码首先进行了筛选，因此任何原本signal为0的行都将从data中移除。然后，profit_pct列只会针对筛选后的数据进行设置。

并不是老师说的“收盘价有可能不同，因为复权价格”的问题，差距也太大了……

还有就是对于本节课给老师的一点建议：
1.对于pct_change、cumprod这类计算怎么来的可以简单讲解一个小例子，便于基础较差的同学理解，而不是只有对文档的解释
2.对于profit_pct  cum_profit数据的解释也不要只看个大概，还是要解释和验证一下数据的真实性，即便可能因为价格有误差，也可以说明一下
3. 对于这个收益因该还是多说明一下，这个收益是按照周四买周一卖的累计收益最高有10倍，像课程中的口误1000倍明显是只有持有原始股一直不卖，卖在高点才能有的收益吧，实际上这种收益是10倍左右，这种常识性问题从老师口中说出会误导这个收益的计算是计算的初始购买然后不卖的累计收益……

回复有任何疑惑可以回复我~ 2024-03-01 11:43:55

weixin_慕圣7555940 2022-08-08 23:24:15

(data):
    data = data[data[] != ]
    data[] = (data[] - data[].shift()) / data[].shift()
    data = data[data[] == -]
    data

用我上面的代码就对了，老师上面讲的时候，就是用的这个代码，用pct_change()算的结果，和上面是不一样的

显然这里用pct_change()这个函数是不对的

0 回复有任何疑惑可以回复我~

收起回答

慕容3139001 #1
```
data[] == -      是何意？
```
回复有任何疑惑可以回复我~ 2023-01-06 11:03:50

Allen_MC 2022-03-06 14:33:01

我得到的也是这个结果

0 回复有任何疑惑可以回复我~

收起回答

为什么我的取值和计算结果都和老师不同呢

正在回答回答被采纳积分+3

3回答

相似问题

请选择置顶位置

本课精华内容

2-12 【第二章章节作业】：创建你的股票数据库