Yep, thank you Huzefa, that’s got it. WHP
From: Huzefa Khalil [mailto:huzefa.kha...@umich.edu] Sent: Tuesday, May 15, 2018 2:42 PM To: Bill Poling <bill.pol...@zelis.com> Cc: r-help (r-help@r-project.org) <r-help@r-project.org> Subject: Re: [R] Forecasting tutorial "Basic Forecasting" Instead of Tsp = c(2016, 2018, 12) try Tsp = c(2016, 2018.25, 12) Hence, you can specify the object as structure(c(5973156.76, 5159011.2, 6695766.64, 6365359, 6495218.53, 7226302.39, 6835272.7, 7383501.57, 6962748.19, 7623278.72, 7274994.33, 7919421.8, 7360740.81, 7436693.35, 8545765.55, 7337269.76, 8180585.44, 8376635.05, 7758261.24, 10374641.22, 8000314.11, 9114958.9, 9805149.15, 9336939.45, 10273849.1, 9159308.71, 10184703.33, 10251153.52, -52340.21, -90911.29, -90135.33, -147196.03, -112831.26, -99443.31, -72584.09, -161869.48, -117805.41, -81102.39, -175379.25, -190596.12, -110838.08, -127953.99, -129414.01, -131570.11, -28814.27, -63066.4, -134587.17, -27610.96, -169293.37, -144034.7, -193376.36, -135743.08, -151767.63, -156816.35, -113074.01, -160705.61, -700973.75, -891171.15, -805670.71, -821222.02, -1078184.45, -980080.81, -786506.89, -1244278.5, -1392779.81, -1186436.41, -1108016.28, -1201663.88, -1163848.16, -1028830.6, -1507572.01, -1210422.01, -1529691.9, -1207461.55, -1615971.18, -978028.1, -1354515.28, -1624270.48, -1596204.33, -1836731.26, -1310376.81, -1337718.49, -1492220.98, -1421801.16), .Dim = c(28L, 3L), .Dimnames = list(NULL, c("TotalNetRev", "TotalRevAdjusted", "TotalRevCancelled")), .Tsp = c(2016, 2018.25, 12), class = c("mts", "ts", "matrix")) You were correct that the error was because of 28 time-points. This is the fix for it. Huzefa On Tue, May 15, 2018 at 2:08 PM, Bill Poling <bill.pol...@zelis.com<mailto:bill.pol...@zelis.com>> wrote: > Hi. I am trying to follow this forecasting tutorial at: > https://www.r-bloggers.com/basic-forecasting/<https://www.r-bloggers.com/basic-forecasting/> > > Using my own data, I cannot get past the first step, lots of laughs. > > dat3 <- structure(c(5973156.76, 5159011.20, 6695766.64, 6365359.00, > 6495218.53, 7226302.39, 6835272.70, 7383501.57, 6962748.19, 7623278.72, > 7274994.33 > ,7919421.80, 7360740.81, 7436693.35, 8545765.55, 7337269.76, 8180585.44, > 8376635.05, 7758261.24, 10374641.22, 8000314.11, 9114958.90 > ,9805149.15, 9336939.45, 10273849.10, 9159308.71, 10184703.33, 10251153.52 > ,-52340.21, -90911.29, -90135.33, -147196.03, -112831.26, -99443.31, > -72584.09, -161869.48, -117805.41, -81102.39, -175379.25, -190596.12 > ,-110838.08, -127953.99, -129414.01, -131570.11, -28814.27, -63066.40, > -134587.17, -27610.96, -169293.37, -144034.70, -193376.36, -135743.08 > ,-151767.63, -156816.35, -113074.01, -160705.61 > ,-700973.75, -891171.15, -805670.71, -821222.02, -1078184.45, -980080.81, > -786506.89, -1244278.50, -1392779.81, -1186436.41, -1108016.28 > ,-1201663.88, -1163848.16, -1028830.60, -1507572.01, -1210422.01, > -1529691.90, -1207461.55, -1615971.18, -978028.10, -1354515.28, -1624270.48 > , -1596204.33, -1836731.26, -1310376.81, -1337718.49, -1492220.98, > -1421801.16) > ,.Dim = c(28L, 3L) > ,.Dimnames = list(NULL, c("TotalNetRev","TotalRevAdjusted" > ,"TotalRevCancelled")) > ,.Tsp = c(2016, 2018, 12) > , class = c("mts", "ts", "matrix")) > > Error in attributes(.Data) <- c(attributes(.Data), attrib) : > invalid time series parameters specified > > I think the error may be due to 28 months of data, complete 2016 & 2017 but > only 4 months in 2018 and my Tsp is a value of 12? If so how would I adjust? > > I have googled a few references for the error, but the solution is not clear > to me. > https://stackoverflow.com/questions/32369737/error-invalid-time-series-parameters-specified-in-backtesting-r-script<https://stackoverflow.com/questions/32369737/error-invalid-time-series-parameters-specified-in-backtesting-r-script> > http://r.789695.n4.nabble.com/How-to-setup-the-tsp-attribute-of-a-dataset-td908269.html<http://r.789695.n4.nabble.com/How-to-setup-the-tsp-attribute-of-a-dataset-td908269.html> > > Thanks for any advice. > > WHP > > > Confidentiality Notice This message is sent from Zelis. ...{{dropped:15}} > > ______________________________________________ > R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To > UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html<http://www.R-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. 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