Wolfram 语言™

听取金融趋势

导入 1990 年至今的金融数据.

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msft = TimeSeriesRescale[ TimeSeries@ FinancialData["MSFT", {"Jan. 1, 1990", DateString[Now]}], {0, 10}]; aapl = TimeSeriesRescale[ TimeSeries@ FinancialData["AAPL", {"Jan. 1, 1990", DateString[Now]}], {0, 10}];

对数据进行重新采样和平滑处理.

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resampledMSFT = TimeSeriesResample[Round[MovingAverage[msft, 60]], 1/8]; resampledAAPL = TimeSeriesResample[Round[MovingAverage[aapl, 60]], 1/8]; ListLinePlot[{resampledMSFT, resampledAAPL}, PlotStyle -> {Automatic, Automatic, PointSize[Large]}, PlotLegends -> {"MSFT", "AAPL"}]

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定义将价格转换为频率的函数.

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midiToFreq[m_] := Clip[2^((m - 69)/12)*440., {0, 22050}];

生成由两个时间序列控制的音频.

In[4]:=

res = .8 Mean[{AudioGenerator[{"Sin", midiToFreq[.5 resampledMSFT + 40]}], AudioGenerator[{"Triangle", midiToFreq[.5 resampledAAPL + 40]}]}]

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Spectrogram[res, 4096, 4096, PlotRange -> {All, {0, 4000}}, ImageSize -> 300]

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