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dear members, I am using arfima() from forecast package to model a time series. The following is the code: > LYGH[[202]] [1] 45.40 3.25 6.50 2.15 > arfima(LYGH[[202]]) Error in .fdcov(x, fdf$d, h, nar = nar, nma = nma, hess = hess, fdf.work = fdf$w) : NA/NaN/Inf in foreign function call (arg 5) I tried viewing .fdcov() with the following code: View(environment(fracdiff)$.fdcov) but I see no stop() with the above mentioned error message. Can you please help? THanking you, Yo...

...on Wed, 31 May 2023 20:55:33 +0000 writes: > dear members, > I am using arfima() from forecast package to model a time > series. The following is the code: >> LYGH[[202]] > [1] 45.40 3.25 6.50 2.15 >> arfima(LYGH[[202]]) > Error in .fdcov(x, fdf$d, h, nar = nar, nma = nma, hess = hess, fdf.work = fdf$w) : > NA/NaN/Inf in foreign function call (arg 5) > I tried viewing .fdcov() with the following code: > View(environment(fracdiff)$.fdcov) > but I see no stop() with the above mentioned error message....

...g> Subject: Re: [R] error in arfima... > Dear Martin, > REgrets to reply this late.... > I am staring at a conundrum never before encountered in my experience with R: > LYGH[[201]] > [1] 45.40 3.25 6.50 2.15 > > arfima(LYGH[[201]]) > Error in .fdcov(x, fdf$d, h, nar = nar, nma = nma, hess = hess, fdf.work = fdf$w) : > NA/NaN/Inf in foreign function call (arg 5) > > arfima(c(45.40,3.25,6.50,2.15)) > Call: > arfima(y = c(45.4, 3.25, 6.5, 2.15)) > Coefficients: > d > 4.583013e-05 > sigma[eps] = 18.01252 &...