创建包含日期的 TimeSeries 

TimeSeries 对象对于将日历日期作为时间戳使用提供支持，其中包括在不同假期日历中的月份或工作日上的定期序列.

创建每日汽油价格的等间隔的时间序列.

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X gasPrices = {3.84, 3.82, 3.81, 3.77, 3.89, 3.86, 3.85, 3.82, 3.79, 3.75, 3.72, 3.68, 3.67, 3.66, 3.95, 3.95, 3.94, 3.93, 3.92, 3.90, 3.88}; ts1 = TimeSeries[gasPrices, {"May 23 2014", Automatic, "Day"}]

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根据纽约证券交易所（NYSE）假期日程，创建工作日的等间隔的时间序列.

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X hopt = HolidayCalendar -> {"UnitedStates", "NYSE"}; bdCount2014 = DayCount[{2014, 1, 1}, {2014, 12, 31}, "BusinessDay", hopt]

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X ts2 = TimeSeries[ Range[bdCount2014], {Automatic, DayRound[{2014, 12, 31}, "BusinessDay", holidayOpt], "BusinessDay"}, ResamplingMethod -> {"Interpolation", InterpolationOrder -> 0}, hopt]

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X RegularlySampledQ[ts2]

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从2014年至今纽约证券交易所的工作日.

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X ts2[Today]

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从外部来源获取的时间数组创建时间序列.

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X content = URLFetch["http://api.stlouisfed.org/fred/series/observations", "Content", "Parameters" -> {"api_key" -> apikey, "series_id" -> "M1V", "file_type" -> "json"}];

显示完整的 Wolfram 语言输入隐藏输入

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X json = ImportString[content, "JSON"]; pairs = MapAt[ ToExpression, {"date", "value"} /. ("observations" /. json), {All, 2}];

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X m1vTS = TimeSeries[pairs]

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X DateListPlot[m1vTS, PlotLabel -> "Velocity of M1 Money Stock", ImageSize -> 300]

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