International Scholarly Research Notices

Research Article

Approximations of Time Series

Figure 5

The trend 𝑇 𝑡 (thin line) of two segments of a series 𝑍 𝑡 is 𝑇 𝑡 = 0 for 𝑡 ≤ 6 0 and 𝑇 𝑡 = 1 for 𝑡 ≥ 6 1 ; whereas, 𝑄 𝑡 (thick line) is the trend of the series over [1,120].
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