This was never intended to work, but can easily be programmed in. I have done so for R-devel.
On Wed, 1 Feb 2006 [EMAIL PROTECTED] wrote: > window() does not work correctly when called with extend=TRUE and > the new time range intersect null with the old time range! Maybe this is > really a feature request, but the documentation does not say what to > expect in this case. > > This case does occur in programming! It is hard to see that it would not be known about in advance. > This is R2.2.1 on windows, latest compiled from CRAN. > > Look at the excerps below: > > > test <- ts(1:144, start=c(1,1), frequency=12) > > tsp(test) > [1] 1.00000 12.91667 12.00000 > > test2 <- window(test, start=c(5,1), end=c(16,4), extend=TRUE) > > test2 > Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec > 5 49 50 51 52 53 54 55 56 57 58 59 60 > 6 61 62 63 64 65 66 67 68 69 70 71 72 > 7 73 74 75 76 77 78 79 80 81 82 83 84 > 8 85 86 87 88 89 90 91 92 93 94 95 96 > 9 97 98 99 100 101 102 103 104 105 106 107 108 > 10 109 110 111 112 113 114 115 116 117 118 119 120 > 11 121 122 123 124 125 126 127 128 129 130 131 132 > 12 133 134 135 136 137 138 139 140 141 142 143 144 > 13 NA NA NA NA NA NA NA NA NA NA NA NA > 14 NA NA NA NA NA NA NA NA NA NA NA NA > 15 NA NA NA NA NA NA NA NA NA NA NA NA > 16 NA NA NA NA > > tsp(test2) > [1] 5.00 16.25 12.00 > > test3 <- window(test, start=c(15,1), end=c(17,1), extend=TRUE) > Error in window.default(x, ...) : invalid time series parameters specified > > Enter a frame number, or 0 to exit > > 1: window(test, start = c(15, 1), end = c(17, 1), extend = TRUE) > 2: window.ts(test, start = c(15, 1), end = c(17, 1), extend = TRUE) > 3: as.ts(window.default(x, ...)) > 4: window.default(x, ...) > > Selection: 4 > Called from: eval(expr, envir, enclos) > Browse[1]> x > Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec > 1 1 2 3 4 5 6 7 8 9 10 11 12 > 2 13 14 15 16 17 18 19 20 21 22 23 24 > 3 25 26 27 28 29 30 31 32 33 34 35 36 > 4 37 38 39 40 41 42 43 44 45 46 47 48 > 5 49 50 51 52 53 54 55 56 57 58 59 60 > 6 61 62 63 64 65 66 67 68 69 70 71 72 > 7 73 74 75 76 77 78 79 80 81 82 83 84 > 8 85 86 87 88 89 90 91 92 93 94 95 96 > 9 97 98 99 100 101 102 103 104 105 106 107 108 > 10 109 110 111 112 113 114 115 116 117 118 119 120 > 11 121 122 123 124 125 126 127 128 129 130 131 132 > 12 133 134 135 136 137 138 139 140 141 142 143 144 > Browse[1]> tsp(x) > [1] 1.00000 12.91667 12.00000 > Browse[1]> y > [1] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA > NA NA NA NA NA NA NA NA NA > [32] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA > Browse[1]> tsp(y) > NULL > Browse[1]> > > As one can see from the above, the calculated answer y does not have a > tsp attribute. > > Kjetil > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
