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require(graphics)
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require(graphics)
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spec.ar(lh)
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spec.ar(lh)
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spec.ar(ldeaths)
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spec.ar(ldeaths)
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spec.ar(ldeaths, method="burg")
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spec.ar(ldeaths, method = "burg")
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spec.ar(log(lynx))
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spec.ar(log(lynx))
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spec.ar(log(lynx), method="burg", add=TRUE, col="purple")
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spec.ar(log(lynx), method = "burg", add = TRUE, col = "purple")
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spec.ar(log(lynx), method="mle", add=TRUE, col="forest green")
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spec.ar(log(lynx), method = "mle", add = TRUE, col = "forest green")
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spec.ar(log(lynx), method="ols", add=TRUE, col="blue")
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spec.ar(log(lynx), method = "ols", add = TRUE, col = "blue")
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}
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}
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\keyword{ts}
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\keyword{ts}