|DateIndex||return date index|
|growth||calculate growth of a series|
|impute_es||imputed by HoltWinters method|
|impute_lm||imputed by regress|
|lag||return lag series|
|reglist||return a pretty answer of regression|
|similarcoef||similar coefficient of industry structure|
|sortcol||order columns based on row's weighing means|
|tcsi||return time series with seasonal character randomly|
|vava||frequently-used functions for me|
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