The Sunshine Duration Error Rates were calculated with Gradient-Descent Algorithm and Genetic Algorithm for Use of Solar Energy Journal title: International Scientific and Vocational Studies Journal Authors: Yalçın KAPLAN Subject(s): Archaeology, Arts and Literature, Astronomy/Astrophysics/Space Science, Biological Sciences, Business Administration, Chemistry, Computer and Information Science, Earth Sciences, Economics, Education, Electrical and Electronic Engineering, Engineering, Materials Science, Medicine, Physics, Social Sciences, Architecture, Literature, Agricultural Science