Python cannot shift with no freq

Describes the cause and action for error messages.


Error Message(English):
cannot shift with no freq

Resolution


関連リンク


ValueError: Cannot shift with no freq - Stack Overflow
https://stackoverflow.com/questions/35637283/valueerror-cannot-shift-with-no-freq

Difference pandas.DateTimeIndex without a frequency
https://stackoverflow.com/questions/49277932/difference-pandas-datetimeindex-without-a-frequency

shifting a time series without frequency?
https://stackoverflow.com/questions/47502584/shifting-a-time-series-without-frequency

Time difference between indices with pandas
https://stackoverflow.com/questions/35607556/time-difference-between-indices-with-pandas

how to get the shifted index value of a dataframe in Pandas ...
https://stackoverflow.com/questions/37820130/how-to-get-the-shifted-index-value-of-a-dataframe-in-pa・・・

how to get the shifted index value of a dataframe in Pandas? - Stack ...
http://stackoverflow.com/a/37820171

Time difference between indices with pandas - Stack Overflow
https://stackoverflow.com/questions/35607556/time-difference-between-indices-with-pandas?lq=1

BUG: Series(DTI/TDI) loses the frequency information from original DTI ...
https://github.com/pandas-dev/pandas/issues/20937

pandas/datetimelike.py at master ・ pandas-dev/pandas ・ GitHub
https://github.com/pandas-dev/pandas/blob/master/pandas/core/arrays/datetimelike.py

python - 周波数を持たない時系列をシフトしますか? - Stack Overrun
https://stackoverrun.com/ja/q/13010461



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