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ARMAtoMA(ar = numeric(), ma = numeric(), lag.max)
arima
ARMAacf
ARMAtoMA(c(1.0, -0.25), 1.0, 10) ## Example from Brockwell & Davis (1991, p.92) ## answer (1 + 3*n)*2^(-n) n <- 1:10; (1 + 3*n)*2^(-n)
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