for {matrix_fact_in, matrix_fact_out, num} = crossvalidation(4, matrix_data) 

Problem: problem_first_num, maximize
  logexp_sum(spline_sum(matrix_parameters_vars, matrix_fact_in))

Problem: problem_second_num, calculate
Point: point_problem_first_num
  logistic_in_num(spline_sum(matrix_parameters_vars, matrix_fact_in, matrix_data_knots_in))
  logistic_out_num(spline_sum(matrix_parameters_vars, matrix_fact_out, matrix_data_knots_in))
  logexp_sum_out_num(spline_sum(matrix_parameters_vars, matrix_fact_out, matrix_data_knots_in))

end for