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

Table 1

List of factors and levels.

Level	Factor
	A (weather)	B (temperature difference (°C))	C (Tmax (°C))	D (wind speed grade)
1	Sunny day	1∼5	-1∼10	1∼2
2	Cloudy	6∼10	11∼20	3∼4
3	Rainy day	11∼15	21∼32	5∼6