On the flight home, Yuanfei half-concealed and told everyone about Jason. Bath's invitation. Pen & Fun & Pavilion www.biquge.info everyone listened to the excitement and cursed Bass.

"This Jason actually wants to collude with the small boss and disturb the fair environment of the alliance, it is really an unforgivable crime!" Bosh was indignant.

"However, the Buss family is full of talent, is he really so sure that he can inherit the Lakers?" Billups thinks farther, and his perspective is a little more unique.

"The affairs of other people's own families, who will inherit the Lakers, we don't have to worry about it." Yuan Fei smiled: "No matter what, we are the defending champions now, and the Lakers are just an out-of-the-box team in the playoffs." It is them, not us, that should be worried. ”

"Jason is arrogant, but I like it." Yao Ming also laughed.

"This guy is still Kobe. Bryant's die-hard fan, he thinks Bryant is better than me? Interesting. Maddie laughed too, and Bus's words stirred up his fighting spirit.

Buss felt that Bryant would be like Jordan and build a dynasty around him. Of course, I don't think so, we don't agree to it. "Yuanfei certainly has to support Maddie at such a time.

"Jason, how do you think you compare to a superstar like Bryant, Tracy or Iverson?" Bosh asked suddenly.

"Well, that's a broad question. If you talk about historical status, you must consider the honor first, and Tracy will definitely be a big plus if he wins the MVP, championship and FMVP in a year. After all, Jordan can only do this in the future with him and O'Neal Duncan, and those two can hit the top ten positions in history. If Tracy suddenly announces his retirement today, I think he will probably be in the top 40 all-time. Yuanfei thought for a moment and replied.

"No, no, I want to ask, does the data show the value of the players on the pitch? You can't say that whoever scores more points is great, right? Bosh added.

"Oh, then you need to know what the data does. Ideally, the data is one that shows everything that happens on the pitch. However, due to the limitations of statistical and analytical capabilities, the current data is obviously not omnipotent, and there are many data that cannot be specifically statistically calculated. But the good news is that the data analysis of basketball is still evolving, and there will always be some better statistical standards emerging. Yuan Fei said: "The John who has written a lot of football reviews before. Hollinger has just invented an advanced statistic, the. (usually translated as efficiency value), which can better show the overall strength of a player. ”

"What is advanced data? What is per? Bosh looked confused.

"Advanced data () is some data that is integrated on the basis of the basic data. Like the rebounding rate I told you last time, the rebounding rate is an advanced statistic derived from the number of rebounds, which is a better indicator of a player's ability to grab rebounds than the number of rebounds. Yuan Fei talked about basketball theory and gushed endlessly, "And the efficiency value is used to reflect what the average strength ratio of the players is to this era." I won't go into details about the complexity of this statistic, but it includes positive data such as points, assists, offensive rebounds, defensive rebounds, and steals, as well as negative data such as iron hits and turnovers, and finally unifies these into one value. The average of the league is 15, which means that those above 15 are good players, those above 20 are considered stars, and those above 25 are almost superstars. ”

"It's good, it's easy to understand. So who is in front of our team? It's supposed to be Tracy, right? Bosh asked, "How many Bryant and Iverson are there?" Which of them is taller? ”

"I can't use the Internet on the plane...... I'll tell you when I get back to the statistics. Yuan Fei said embarrassedly: "Another good statistic is called win.shares, referred to as WS, this data is also a variety of basic data calculations, and finally each person's contribution to the team's win is roughly simulated into a number, for example, we are now 49 wins, and the WS of our team players is added up to 49." If Yao's WS is 10, that is to say, if Yao does not play, we will probably be at the level of 39 wins. ”

"Then it's a problem, 39 wins and even the playoffs are hard to get into." Bosh frowned.

"Of course, it can't be completely that way. Because Yao was always on the field and had the ball, he played very good statistics. If Yao can't play, Dapu will start on top. Because Dapu's offensive skills are not as good as Yao's, even if your playing time remains the same, you will get more balls, which will also cause your PER and WS to get better. Yuan Fei analyzed: "Of course, the efficiency value and victory contribution value are not perfect, they are statistics made in a specific tactical environment. Of course, they are a big step forward from the previous basic statistics. ”

"I see, this advanced data is not particularly easy to use." Bosh seemed a little disappointed, "And what are their obvious shortcomings?" ”

"Let's talk about efficiency first, the biggest problem is that it has too much to do with the ball, especially the shot. In the formula, it has a lighter penalty for hitting iron and a high bonus for hitting the ball, which results in some players with average shooting ability but a lot of shots having an advantage in this statistic, and players who shoot well but with fewer shots are at a disadvantage. In other words, this thing is still more suitable for those so-called data brushes, the kind of players who generally shoot the ball. "Another major drawback is that the efficiency value does not reflect the defensive ability, and there are some role players who have great defense but few shots, and the PER will not only not reach the average of 15, but even fall below 10. But they're all very good people in the league. ”

"Hmm...... That's right. ”

"There are more minor problems, for example, the bonus ratio of assists is 2/3, I don't know why the assists are set at 2/3. A bad pass is barely scored due to the receiver's good skills, and a good pass causes the receiver to dunk easily, the two are the same in terms of bonuses, which is the bottleneck of current data analysis, and there is no way to specifically quantify the contribution of multiple people in a goal. Yuan Fei continued: "Another example is that the contribution ratio after the block should be multiplied by the rebounding rate in the backcourt, which is a good idea, but not objective enough. For example, if you block an opponent out of bounds, although the ball is still the opponent's, there is not much time left for the offense, which is actually equivalent to defending it. Therefore, the recognition of the efficiency value for the cap statistics is a bit low. ”

"No, I'm already confused." Bosh said: "Can WS be simpler? ”

"Sorry, the algorithm for the Victory Contribution is more complicated than the efficiency value, and it originated from the data expert Bill Brown in the baseball world. James's algorithm is upgraded. The main disadvantage of WS is that there are several calculation links that are calculated through the overall data of the team, which does not take into account the distinction between the main team and the substitute. After all, there is a difference between bringing good teammates and bad teammates. Comparatively speaking, it is advantageous to calculate WS for a very healthy star who plays in a strong team. ”

"Okay, I'm completely giving up on learning data analysis from you...... The more you study this thing, the harder it gets. Bosh said with a bitter face.

"For you, just learn to use it. There's no need to delve into how this data came from and what the algorithm looks like. If you can find it, you can find it. Yuanfei thought for a while and said: "Actually, I advocate that players should learn a little data, so that they can improve their own conditions." Human energy is limited, and the limited energy is invested in more effective training programs. ”

Bosh's eyes lit up, "Okay! (To be continued.) )