`accuracy_theta.Rd`

Calculate accuracy measure based on Theta method

accuracy_theta(ts_info, function_name, length_out)

ts_info | list containing training and test part of a time series |
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function_name | function to calculate the accuracy function, the arguments of this function should be forecast, training and test set of the time series |

length_out | number of measures calculated by the function |

returns accuracy measure calculated based on theta method