Table 1 Selection of Optimum Number of Neurons based on R.

From: Artificial neural network model with different backpropagation algorithms and meteorological data for solar radiation prediction

No. of neuron

R training

R testing

1

0.7408

0.7518

2

0.7507

0.7317

3

0.7985

0.7589

4

0.8026

0.7764

5

0.7997

0.7999

6

0.7926

0.8059

7

0.8029

0.7932

8

0.8053

0.7833

9

0.7946

0.8096

10

0.8043

0.8147

11

0.7995

0.8007

12

0.8102

0.8002

13

0.8077

0.7958

14

0.8012

0.8229

15

0.8024

0.8231

16

0.8059

0.7992

17

0.8105

0.7886

18

0.8101

0.7715

19

0.8113

0.802

20

0.8088

0.784

  1. Significant values are in bold.
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