我有一个从 2012 年到 2018 年的数据框（下面的前 200 行），我正在尝试将其转换为 tsibble。虽然我已经设法对其进行了转换，使用 UI 变量作为键，使用 Date 变量作为索引，但由于频率的原因，我的分析遇到了一些麻烦。我有每日数据，所以 tsibble 上的频率是 [1D]，但我需要按年计算频率才能分析季节性。我尝试使用 years(Ano) 作为索引，但之后的一切都是错误的。我有解决这个问题的方法吗？我也尝试了以下功能，但没有奏效：
https://rdrr.io/github/dashfordgroup/tsibbletools/man/change_frequency.html
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谢谢您的帮助！