2.1. Coin toss Method in I Ching
The divination of I Ching is generally divided into three processes. The first is to use any divination method to obtain one of the 64 hexagrams as the original hexagram, and then refer to the original text of I Ching to read and understand the obtained hexagrams. The second is to wrong hexagrams, comprehensive hexagrams, mutual hexagrams, and changed hexagrams based on the original hexagram, further understanding the meaning of hexagrams from multiple perspectives [
10,
11].The third is to infer the development trend or divination result of things through the divination words of I Ching, combining the hexagram images and line(Yao) images, the hexagram words (divination words) and line(Yao) words, the relationship between line(Yao) positions, and the mechanism of the mutually reinforce and neutralize each other of Yin Yang and five elements.
Coin toss method originated in the Yin and Shang period of China, and is still popular and widely used by many people. The process of coin toss method divination is as follows: the diviner takes out three coins (It is not possible to distinguish between ancient coins and current popular coins), and stipulates that the side marked with characters is the positive side, and the other side is the negative side. Put the coin between the two hands, shake it repeatedly and then throw it on the table to record the number of the front and the back. There must be four combinations of positive and negative: two positive and one negative (Shaoyang), two negative and one positive (Shaoyin), three positive (Laoyang, marked as dynamic line) and three negative (Laoyin, marked as dynamic line). The combination is shown in
Figure 1.There will be only one of four combinations for each roll.Repeat the operation 6 times to form 6 lines. One throw is a line, and six throw is a hexagram. From the first roll to the sixth roll, the start, second, third, fourth, fifth and upper lines are recorded respectively. The obtained hexagram is called the original hexagram.
2.2. Rules of Hexagram Changes
Dynamic lines(Dongyao): In the process of forming the hexagram, the lines of Laoyang or Laoyin appeared in the six flips of three coins, which are called dynamic lines.
Changing hexagrams(Biangua): This hexagram is the initial one, which reflects the initial information or current situation of things. In the process of forming the hexagram, if the Laoyang or Laoyin appears, the line in which it is located will become the opposite line, that is, the Laoyang will become the yin line, and the Laoyin will become the yang line.A new hexagram is formed according to the moving hexagram, which is called changing hexagram.The line corresponding to the action line of the hexagram is called the change line.A feedback relationship is formed between the dynamic line and the changing line. Therefore, the appearance of the dynamic line plays an important role in the interpretation of the hexagram, and can also reflect the mutual connection and transformation between things. According to the divination thought of I Ching that anode generates Yin and cathode generates Yang, Laoyang will become Shaoyin after the change of lines, and Laoyin will become Shaoyang after the change of lines. There are many ways to change hexagrams. Each hexagram can have many possibilities according to the number of changed lines and the position of lines. There are 4096 scenarios according to permutation and combination. The change of fortune represents the final result of the development and change of current things.
Change of line(Bianyao): when a dynamic line appears in the process of forming the hexagram, the corresponding line in the change of line is called a change of line.
According to original hexagram, three other hexagrams can be deduced, namely mutual hexagram, wrong hexagram and comprehensive hexagram. This is also the source of the word “intricate” in Chinese idioms.
Mutual hexagram(Hugua): It is composed of the remaining four lines after removing the upper and lower. The specific combination method is: among the remaining four lines, the upper three lines and the lower three lines form a new hexagram, that is, the mutual hexagram of the hexagram. As shown in
Figure 2. Mutual hexagram is used to judge the intermediate process after an event occurs but before the result appears, reflecting the internal interaction of this divination over time.
Wrong hexagram (Cuogua): The new hexagram is called wrong hexagram after all the yin and Yang lines in this hexagram are inverted lines, that is, the yin and Yang properties of each line in the wrong hexagram are opposite to the original hexagram.
Figure 3.The wrong hexagram mainly looks at the development of things from the opposite perspective.It reflects the dialectical unity thought of I Ching.
Comprehensive hexagram (Zonggua): The hexagram obtained by rotating the six lines of this hexagram 180 degrees is called comprehensive hexagram.It is like a pinhole image, or simply called “mirror divination” or “inverted divination”. Comprehensive divination is to think about the things to be measured from the perspective of outside and inside. As shown in
Figure 4.
The comprehensive hexagrams are relative. All 64 hexagrams are relative except 8.These eight divinatory symbols are Qian, Kun, Kan, Li, Daguo, Xiaoguo, Yi, Zhongfu. Among them, the first four hexagrams belong to cosmic phenomena, and the last four hexagrams belong to personnel phenomena. Both the cosmic phenomenon and the personnel phenomenon have their invariable nature, so there is no comprehensive divination.
Figure 4.
Schematic diagram of basic characteristics of hexagram change.
Figure 4.
Schematic diagram of basic characteristics of hexagram change.
Figure 5.
Spatial distribution characteristics of hexagram change by coin divination method 135 °.
Figure 5.
Spatial distribution characteristics of hexagram change by coin divination method 135 °.
2.3. Calculation of Assembly Combination of Hexagrams and Lines (Yao)
The coin toss method is different from other methods of divination. Each line has only one dynamic line. Since the three coins are randomly arranged for six times, there may be seven situations for each hexagram, that is, there is no change of dynamic line, dynamic line from one line to six lines. Every time these line changes occur, there will be various change situations, mutual hexagram, wrong hexagram and comprehensive hexagram. The statistics of these changes can reveal the characteristics and laws of the changed hexagrams and lines(Yao). This article adopts the method of taking up the change of six lines mentioned in Zhu Xi’s “Enlightenment of I Ching”, that is, the change of one line is accounted for by the words of the changed line in this hexagram; When the two lines are changed, the words of the two lines of the hexagram are used, and the upper line is the main line; If the three lines change, they will take up the words of the original hexagram and the changed hexagram; When the four lines change, the words of the two lines of the changed hexagram are used, and the lower line is the main line; If the five lines change, the unchanging lines in the changed hexagram are used for divination; If the six lines change, Qian and Kun use their Yongyao for divination, and the rest of the hexagrams use their hexagram words for divination; If the six lines are unchanged, divination is carried out according to the original hexagram words [
12].
In order to calculate this change, we (1) use a random number generator to generate open interval random numbers within the specified range. The random number generator in the process of three coins starting generates only positive and negative coins, while ensuring that the generation of each random number is random and equal; (2) The number of random numbers will start from 104 Increase to 108; (3) Record the number of occurrences of the Laoyang, the Laoyin, the Shaoyang and the Shaoyin of each line, the number of occurrences of all the six lines from the unchanged line, and the occurrence of the transformation of each hexagram into other hexagrams (changing hexagrams, mutual hexagrams, wrong hexagrams and comprehensive hexagrams). (4) Map based on the probability distribution of each hexagram being transformed into other hexagrams to visualize the spatial characteristics of the hexagram transformation using a 64 matrix.