[R] ggplot2 facet_wrap problem

Tue Dec 2 22:52:11 CET 2008

Hadley,
I don't know if I am doing something wrong or if it is ggplot please
see the two graphs at the bottom of the page (code).

melt.nut <- (structure(list(RiverMile = c(119L, 119L, 119L, 119L, 119L, 119L,
119L, 119L, 119L, 148L, 148L, 148L, 148L, 148L, 148L, 148L, 179L,
179L, 179L, 179L, 179L, 179L, 179L, 185L, 185L, 185L, 185L, 185L,
185L, 185L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L,
190L, 190L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L,
198L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L,
215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 119L, 119L,
119L, 119L, 119L, 119L, 119L, 119L, 119L, 148L, 148L, 148L, 148L,
148L, 148L, 148L, 179L, 179L, 179L, 179L, 179L, 179L, 179L, 185L,
185L, 185L, 185L, 185L, 185L, 185L, 190L, 190L, 190L, 190L, 190L,
190L, 190L, 190L, 190L, 190L, 190L, 198L, 198L, 198L, 198L, 198L,
198L, 198L, 198L, 198L, 198L, 202L, 202L, 202L, 202L, 202L, 202L,
202L, 202L, 202L, 202L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 215L, 215L, 215L, 215L, 61L, 61L, 61L, 61L, 61L, 61L, 61L,
61L, 61L, 119L, 119L, 119L, 119L, 119L, 119L, 119L, 119L, 119L,
148L, 148L, 148L, 148L, 148L, 148L, 148L, 179L, 179L, 179L, 179L,
179L, 179L, 179L, 185L, 185L, 185L, 185L, 185L, 185L, 185L, 190L,
190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 198L,
198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 202L, 202L,
202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 215L, 215L, 215L,
215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 61L, 61L,
61L, 61L, 61L, 61L, 61L, 61L, 61L, 119L, 119L, 119L, 119L, 119L,
119L, 119L, 119L, 119L, 148L, 148L, 148L, 148L, 148L, 148L, 148L,
179L, 179L, 179L, 179L, 179L, 179L, 179L, 185L, 185L, 185L, 185L,
185L, 185L, 185L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L,
190L, 190L, 190L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L,
198L, 198L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L,
202L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 215L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 119L,
119L, 119L, 119L, 119L, 119L, 119L, 119L, 119L, 148L, 148L, 148L,
148L, 148L, 148L, 148L, 179L, 179L, 179L, 179L, 179L, 179L, 179L,
185L, 185L, 185L, 185L, 185L, 185L, 185L, 190L, 190L, 190L, 190L,
190L, 190L, 190L, 190L, 190L, 190L, 190L, 198L, 198L, 198L, 198L,
198L, 198L, 198L, 198L, 198L, 198L, 202L, 202L, 202L, 202L, 202L,
202L, 202L, 202L, 202L, 202L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 215L, 215L, 215L, 215L, 215L, 61L, 61L, 61L, 61L, 61L,
61L, 61L, 61L, 61L, 119L, 119L, 119L, 119L, 119L, 119L, 119L,
119L, 119L, 148L, 148L, 148L, 148L, 148L, 148L, 148L, 179L, 179L,
179L, 179L, 179L, 179L, 179L, 185L, 185L, 185L, 185L, 185L, 185L,
185L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L,
190L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L,
202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 215L,
215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 119L, 119L, 119L,
119L, 119L, 119L, 119L, 119L, 119L, 148L, 148L, 148L, 148L, 148L,
148L, 148L, 179L, 179L, 179L, 179L, 179L, 179L, 179L, 185L, 185L,
185L, 185L, 185L, 185L, 185L, 190L, 190L, 190L, 190L, 190L, 190L,
190L, 190L, 190L, 190L, 190L, 198L, 198L, 198L, 198L, 198L, 198L,
198L, 198L, 198L, 198L, 202L, 202L, 202L, 202L, 202L, 202L, 202L,
202L, 202L, 202L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 215L, 215L, 215L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L,
61L, 119L, 119L, 119L, 119L, 119L, 119L, 119L, 119L, 119L, 148L,
148L, 148L, 148L, 148L, 148L, 148L, 179L, 179L, 179L, 179L, 179L,
179L, 179L, 185L, 185L, 185L, 185L, 185L, 185L, 185L, 190L, 190L,
190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 198L, 198L,
198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 202L, 202L, 202L,
202L, 202L, 202L, 202L, 202L, 202L, 202L, 215L, 215L, 215L, 215L,
215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 61L, 61L, 61L,
61L, 61L, 61L, 61L, 61L, 61L, 119L, 119L, 119L, 119L, 119L, 119L,
119L, 119L, 119L, 148L, 148L, 148L, 148L, 148L, 148L, 148L, 179L,
179L, 179L, 179L, 179L, 179L, 179L, 185L, 185L, 185L, 185L, 185L,
185L, 185L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L, 190L,
190L, 190L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L, 198L,
198L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L, 202L,
215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 61L, 119L, 119L,
119L, 119L, 119L, 119L, 119L, 119L, 119L, 148L, 148L, 148L, 148L,
148L, 148L, 148L, 179L, 179L, 179L, 179L, 179L, 179L, 179L, 185L,
185L, 185L, 185L, 185L, 185L, 185L, 190L, 190L, 190L, 190L, 190L,
190L, 190L, 190L, 190L, 190L, 190L, 198L, 198L, 198L, 198L, 198L,
198L, 198L, 198L, 198L, 198L, 202L, 202L, 202L, 202L, 202L, 202L,
202L, 202L, 202L, 202L, 215L, 215L, 215L, 215L, 215L, 215L, 215L,
215L, 215L, 215L, 215L, 215L, 61L, 61L, 61L, 61L, 61L, 61L, 61L,
61L, 61L), variable = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L,
2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 4L,
4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L,
4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L,
4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L,
4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L,
4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L,
4L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L,
5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L,
5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L,
5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L,
5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L,
5L, 5L, 5L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L,
6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L,
6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L,
6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L,
6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L, 6L,
6L, 6L, 6L, 6L, 6L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L,
7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L,
7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L,
7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L,
7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L, 7L,
7L, 7L, 7L, 7L, 7L, 7L, 7L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L,
8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L,
8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L,
8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L,
8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L,
8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 8L, 9L, 9L, 9L, 9L, 9L, 9L, 9L,
9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L,
9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L,
9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L,
9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L,
9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 9L, 10L, 10L, 10L, 10L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L,
10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L, 10L
), .Label = c("P.R", "GPP", "NDM", "CR24", "abs.CR24", "TSS",
"TIN", "Phosphorus", "TIN.TP", "Kdm"), class = "factor"), value = c(NA,
NA, NA, NA, -0.066915449, -0.093917018, NA, 1.019951293, NA,
NA, 2.017149918, NA, 0.189592164, -0.234196581, 0.269013732,
NA, NA, 0.748103002, 7.894158712, NA, 0.9479659, NA, NA, NA,
3.154523416, 1.548924774, 2.112652562, 2.232891361, NA, NA, NA,
NA, NA, NA, NA, NA, NA, 2.910836928, NA, NA, NA, NA, NA, NA,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 1.156422043,
1.073329968, 0.675283717, 0.919190889, 0.975135008, NA, NA, NA,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, -0.116329637,
0.623416534, 0.11154653, NA, NA, NA, NA, NA, NA, NA, -0.253939188,
-0.259694431, NA, 0.303075477, NA, NA, 1.223052413, NA, 0.595659466,
-0.415908847, 0.130062254, NA, NA, 2.361170968, 2.518121521,
NA, 2.67636584, NA, NA, NA, 1.173056254, 2.442185134, 1.159948001,
4.703411567, NA, NA, NA, NA, NA, NA, NA, NA, NA, 0.649974627,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, 11.85338495, 10.04657895, 4.995851341, 4.426742631, 4.700996957,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, -0.314806304,
1.165099135, 0.207974813, NA, NA, NA, NA, NA, NA, NA, -4.048865363,
-3.02484218, NA, 0.005928467, NA, NA, 0.616725435, NA, -2.546134227,
-2.191805175, -0.353415867, NA, NA, -0.795040091, 2.199136102,
NA, -0.146906432, NA, NA, NA, 0.801191443, 0.865488076, 0.610899842,
2.596989531, NA, NA, NA, NA, NA, NA, NA, NA, NA, 0.426679869,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, 1.603333926, 0.686382879, -2.402300298, -0.389169586,
-0.119870838, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, NA, -3.020963667, -0.703794408, -1.656492078, NA, NA,
NA, NA, NA, NA, NA, -3.794926175, -2.765147748, NA, -0.297147009,
NA, NA, 0.606326977, NA, -3.141793693, -1.775896327, -0.48347812,
NA, NA, -3.156211059, -0.318985419, NA, -2.823272272, NA, NA,
NA, 0.371864811, -1.576697058, -0.54904816, 2.106422036, NA,
NA, NA, NA, NA, NA, NA, NA, NA, 0.223294758, NA, NA, NA, NA,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, -10.25005103,
-9.360196068, -7.398151639, -4.815912217, -4.820867795, NA, NA,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, -2.706157363,
-1.868893543, -1.864466891, NA, NA, NA, NA, NA, NA, NA, 3.794926175,
2.765147748, NA, 0.297147009, NA, NA, 0.606326977, NA, 3.141793693,
1.775896327, 0.48347812, NA, NA, 3.156211059, 0.318985419, NA,
2.823272272, NA, NA, NA, 0.371864811, 1.576697058, 0.54904816,
2.106422036, NA, NA, NA, NA, NA, NA, NA, NA, NA, 0.223294758,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA, 10.25005103, 9.360196068, 7.398151639, 4.815912217, 4.820867795,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 2.706157363,
1.868893543, 1.864466891, NA, NA, NA, 8.5, 12, 19, 11, 14, 24,
9.3, 6.1, 9.5, 5.4, 11, 9.7, 8.2, 9.6, 6.1, 4.4, 6.2, 8.4, 4.4,
5.6, 3.1, 3.1, 3.1, 2.9, 11, 1.4, 1.4, 1.8, 1.4, 0.8, 0, 0, 1,
4.4, 5.8, 1.5, 2, 2.1, 0.4, 0.9, 1.2, 2.4, 5.8, 0.5, 0.8, 0.5,
1.7, 0.4, 0.6, 0.7, 1.4, 1.9, 1.2, 2.6, 2.1, 8.5, 7, 0.9, 1.4,
1.5, 1.6, 0.77, 1.1, 1.1, 0.8, 1, 1.4, 1.1, 1, 0.8, 2.6, 0.8,
5.7, 16, 23, 27, 25, 24, 19, 10, 9.8, 14, 0.45, 0.362, 0.51,
0.43, 0.29, 0.44, 0.432, 0.52, 0.55, 0.27, 0.345, 0.46, 0.23,
0.38, 0.333, 0.408, 0.38, 0.52, 0.34, 0.38, 0.308, 0.37, 0.42,
0.35, 0.446, 0.31, 0.3, 0.3, 0.36, 0.403, 0.35, 0.22, 0.2, 0.26,
0.34, 0.2, 0.38, 0.35, 0.2, 0.288, 0.36, 0.278, 0.238, 0.204,
0.203, 0.12, 0.205, 0.14, 0.124, 0.06, 0.2, 0.205, 0.054, 0.13,
0.13, 0.217, 0.228, 0.1, 0.105, 0.22, 0.168, 0.27, 0.069, 0.134,
0.092, 0.14, 0.32, 0.29, 0.148, 0.272, 0.141, 0.116, 0.255, 0.44,
0.336, 0.491, 0.41, 0.27, 0.37, 0.444, 0.509, 0.49, 0.092, 0.11,
0.17, 0.15, 0.13, 0.15, 0.12, 0.16, 0.18, 0.092, 0.1, 0.081,
0.13, 0.15, 0.12, 0.13, 0.1, 0.19, 0.099, 0.12, 0.13, 0.12, 0.14,
0.1, 0.2, 0.088, 0.099, 0.12, 0.12, 0.15, 0.039, 0.031, 0.09,
0.082, 0.038, 0.025, 0.062, 0.036, 0.038, 0.048, 0.037, 0.013,
0.021, 0.017, 0.014, 0.012, 0.016, 0.014, 0.012, 0.015, 0.015,
0.018, 0, 0.013, 0.019, 0.021, 0.01, 0.013, 0.011, 0.014, 0.0076,
0.0085, 0.0072, 0, 0, 0.013, 0.0085, 0.01, 0.01, 0.0086, 0.014,
0.011, 0.011, 0.098, 0.11, 0.15, 0.15, 0.15, 0.14, 0.12, 0.15,
0.18, 4.89130434782609, 3.29090909090909, 3, 2.86666666666667,
2.23076923076923, 2.93333333333333, 3.6, 3.25, 3.05555555555556,
2.93478260869565, 3.45, 5.67901234567901, 1.76923076923077, 2.53333333333333,
2.775, 3.13846153846154, 3.8, 2.73684210526316, 3.43434343434343,
3.16666666666667, 2.36923076923077, 3.08333333333333, 3, 3.5,
2.23, 3.52272727272727, 3.03030303030303, 2.5, 3, 2.68666666666667,
8.97435897435897, 7.09677419354839, 2.22222222222222, 3.17073170731707,
8.94736842105263, 8, 6.12903225806452, 9.72222222222222, 5.26315789473684,
6, 9.72972972972973, 21.3846153846154, 11.3333333333333, 12,
14.5, 10, 12.8125, 10, 10.3333333333333, 4, 13.3333333333333,
11.3888888888889, Inf, 10, 6.8421052631579, 10.3333333333333,
22.8, 7.6923076923077, 9.54545454545455, 15.7142857142857, 22.1052631578947,
31.7647058823529, 9.58333333333333, Inf, Inf, 10.7692307692308,
37.6470588235294, 29, 14.8, 31.6279069767442, 10.0714285714286,
10.5454545454545, 23.1818181818182, 4.48979591836735, 3.05454545454545,
3.27333333333333, 2.73333333333333, 1.8, 2.64285714285714, 3.7,
3.39333333333333, 2.72222222222222, 0.166033006, 0.215899925,
0.176977629, 0.177570956, 0.167407343, 0.185127929, 0.153395289,
0.13973999, 0.25665936, 0.091509134, 0.226090397, 0.124200915,
0.146869715, 0.170982018, 0.154434917, 0.133633404, 0.135307727,
0.139343913, 0.108326016, 0.134110718, 0.126367069, 0.119798374,
0.178783418, 0.083451416, 0.12388756, 0.183948454, 0.040627567,
0.068071771, 0.068648292, 0.074866202, 0.082090337, 0.017929514,
0.066658756, 0.076520048, 0.116723214, 0.068629892, 0.053861204,
0.071557357, 0.045859125, 0.050126618, 0.054556049, 0.077883942,
0.095663423, 0.05493292, 0.036506399, 0.060465605, 0.073304875,
0.079904335, 0.08271105, 0.06188989, 0.091794153, 0.050197784,
0.035391028, 0.106448921, 0.111450402, 0.111953522, 0.077441789,
0.060014159, 0.119853983, 0.107380923, 0.073198622, 0.061834447,
0.036280692, 0.034339524, -0.005907224, 0.072871058, 0.053312613,
0.096638058, 0.016316281, 0.035933732, 0.122054269, 0.072184127,
0.294119459, 0.175691138, 0.189686669, 0.301685969, 0.168586598,
0.198433519, 0.192239821, 0.229356909, 0.184770061, 0.072518799
)), .Names = c("RiverMile", "variable", "value"), row.names = c(NA,
-820L), class = "data.frame"))

#this plots fine
qplot(RiverMile, value, data=subset(melt.nut, variable=="TSS"))

#this does not
qplot(RiverMile, value, data=melt.nut)+facet_wrap(~variable,
scales="free")+scale_x_reverse(breaks=unique(melt.nut[,"RiverMile"]))

-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis