On Thu, 5 Jan 2012, R. Michael Weylandt wrote:
My initial guess is because you don't have any complete cases: cf.
this behavior plot(c(NA, NA))
Michael,
Here's a data frame that does plot; no complete cases here, either:
mahalla.tds.z
MAH-100 MAH-225 MAH-50 MASH-10 MASH-20 MASH-30 MASHSP-10
1996-03-27 NA 278 NA NA NA NA NA
1996-04-25 238 250 NA NA NA NA NA
1996-05-10 232 NA NA NA NA NA NA
1996-05-23 226 NA NA NA NA NA NA
1996-05-24 NA NA NA 136 216 258 162
1996-06-03 196 236 NA NA NA NA NA
1996-06-07 232 NA NA NA NA NA NA
1996-07-18 NA NA NA NA NA NA 224
1996-07-22 312 NA 294 NA NA NA NA
1996-08-30 304 NA NA NA NA NA NA
1996-09-26 387 NA NA NA NA NA NA
1996-10-28 293 NA NA NA NA NA NA
If that's not it, dput() your data so that it's useable by others.
dput(millc.tds.z)
structure(c(NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 304,
NA, NA, NA, 320, 500, 545, 570, 518, 458, 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, NA, NA, NA, NA, NA, NA,
NA, NA, NA, NA, NA, NA, NA, NA, 193, NA, NA, NA, 232, NA, 249,
288, 282, 340, NA, NA, 300, 312, NA, NA, NA, NA, 388, 356, 502,
335, 748, 448, 676, 526, 426, 300, 310, 560, 930, 840, 360, 1100,
1100, 440, 450, 630, 830, 350, 490, 937, 1070, 548, 464, 1020,
636, 346, 506, 475, 372, 634, 475, 358, 315, 754, 1050, 280,
852, 410, 429, 479, 456, 336, 391, 381, 378, NA, 439, 273, 348,
292, 320, NA, NA, 330, 384, 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, NA, NA, NA, NA, NA, 395, NA, NA, 374,
347, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, NA, NA, NA, 328, 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, 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, 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, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, NA, NA, NA, NA), .Dim = c(63L, 5L), .Dimnames = list(
NULL, c("MC-0.5", "MC-1", "MC-2", "MC-30", "MC-50")), index =
structure(c(8785L,
8848L, 8876L, 8904L, 8929L, 8971L, 9126L, 9212L, 9217L, 9304L,
9339L, 9581L, 9601L, 9602L, 9659L, 9665L, 9700L, 9730L, 9765L,
9797L, 9822L, 9948L, 10009L, 10072L, 10332L, 10490L, 10730L,
10835L, 11046L, 11108L, 11437L, 11837L, 11898L, 11991L, 12139L,
12201L, 12314L, 12380L, 12507L, 12530L, 12618L, 12745L, 12902L,
12934L, 12992L, 13109L, 13230L, 13320L, 13467L, 13592L, 13628L,
13963L, 13965L, 14056L, 14090L, 14330L, 14363L, 14391L, 14475L,
14559L, 14749L, 14833L, 15112L), class = "Date"), class = "zoo")
Thanks,
Rich
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