A Model for Hourly Solar Radiation Data Generation from Daily Solar Radiation Data Using a Generalized Regression Artificial Neural Network

Table 3

Impact of training data set size on model’s accuracy.

Training data set size (records)	Av. overall MAPE
84 (7 solar days)	64.3%	0.1354
348 (29 solar days)	36.8%	0.2263
684 (57 solar days)	24.1%	0.6583
35,040 (1460 solar days)	11.8%	0.9595