[Retracted] Evaluation Algorithm of Volleyball Players’ Competitive Ability Based on the Random Matrix Model

Table 1

Indicators and description of indicators.

Indicators	Points indicator	Indicators description
Serve	The straight rate	Number of direct serves/total serves
	False positives	Number of serves in net or out/total serves
	Break the attack rate	It is difficult for the receiving side to form an effective attack count/total serve count
	General rate	The number of times served other than the above three conditions/total number of serves
Receiving	Must be	The receiving side will send the ball to the area near positions 2 and 3 to facilitate the passing of the setter in place to organize the number of effective attacks/serves
	Not must be	The setter needs to adjust the distance pass or the number of passes that cannot be made/the number of serves received
	False positives	The number of times the receiving side has not hit the ball into the opponent’s area within the rules/the number of times the receiving side has received the ball