[Retracted] Research on Probability Distribution of Short-Term Photovoltaic Output Forecast Error Based on Numerical Characteristic Clustering

Table 4

List of factors and levels.

Level	Factor
	E (day-ahead forecast output)	G (step length)
1	0∼0.105	−0.06∼−0.045
2	0.105∼0.21	−0.045∼−0.03
3	0.21∼0.315	−0.03∼−0.015
4	0.315∼0.42	−0.015∼−0.003
5	0.42∼0.525	−0.003∼0.009
6	0.525∼0.63	0.009∼0.021
7	0.63∼0.735	0.021∼0.033
8	0.735∼0.84	0.033∼0.045