Thanks hadley I tried just shape=NULL, but did not wrap it in the aes
argument which makes sense.
thanks
On Tue, Oct 14, 2008 at 8:11 AM, hadley wickham <[EMAIL PROTECTED]> wrote:
> On Tue, Oct 14, 2008 at 6:46 AM, stephen sefick <[EMAIL PROTECTED]> wrote:
>> r <-(structure(list(TSS = c(2.8, 8.4, 11, 1.3, 4.2, 2, 3.4, 14, 8.2,
>> 3.1, 1.4, 0.9, 0.5, 6.1, 9.2, 0.6, 1, 11, 2.4, 1.2, 1.3, 1.3,
>> 0, 1.8, 8, 11, 11, 8.5, 8.5, 1.8, 13, 4.4, 1.4, 2.1, 0.5, 25,
>> 25, 9.3, 6.1, 1.6, 1.5, 19, 19, 24, 9.6, 1.8, 1.4, 1), GPP = c(1.213695235,
>> 3.817313822, 1.267930498, 10.45692825, 3.268295623, 3.505286001,
>> 4.468225245, 0.915653726, 1.635617261, 3.726133898, 1.363453706,
>> 13.99650967, 1.581182762, 0.417618143, 0.741080504, 1.366790205,
>> 0.969326797, 0.412440872, 1.780215366, 3.515743675, 8.248491445,
>> 0.125726306, 13.95880794, 4.850627229, -0.438311644, 1.537773727,
>> 1.537773727, 3.249103284, 3.249103284, 2.470317011, 0.768531626,
>> 2.633107621, 3.113199095, 0.773824094, 3.208461305, 0.680150068,
>> 0.680150068, 0.026385752, 0.369310858, 8.049276658, 7.487378383,
>> 0.950072035, 0.950072035, 0.763580377, 0.333244629, 5.475999014,
>> 9.235631398, 2.587682905), RiverMile = c(148L, 179L, 185L, 202L,
>> 179L, 185L, 190L, 119L, 148L, 179L, 185L, 202L, 215L, 119L, 202L,
>> 198L, 215L, 148L, 198L, 190L, 202L, 215L, 198L, 198L, 215L, 148L,
>> 148L, 202L, 202L, 215L, 119L, 179L, 185L, 190L, 198L, 61L, 61L,
>> 119L, 148L, 202L, 202L, 61L, 61L, 119L, 148L, 185L, 202L, 215L
>> )), .Names = c("TSS", "GPP", "RiverMile"), class = "data.frame",
>> row.names = c(12L,
>> 13L, 14L, 19L, 25L, 26L, 28L, 34L, 35L, 36L, 37L, 42L, 44L, 58L,
>> 75L, 85L, 88L, 91L, 97L, 107L, 142L, 144L, 155L, 166L, 169L,
>> 185L, 186L, 201L, 202L, 207L, 219L, 221L, 222L, 224L, 226L, 230L,
>> 231L, 250L, 251L, 258L, 283L, 287L, 288L, 303L, 304L, 306L, 311L,
>> 313L)))
>>
>> library(lattice)
>> library(ggplot2)
>> z <- nls(GPP~(a/(TSS+b)), start=c(a=0.01, b=0.01), data=r)
>> f <- seq(-1, 29, length=100)
>> y <- coef(z)["a"]/(f+coef(z)["b"])
>> pred <- data.frame(GPP = f, TSS = y)
>>
>> #this is what I can do
>> qplot(TSS, GPP, data=r, colour=as.factor(RiverMile)) +
>> geom_line(data=pred, colour ="black")
>>
>> #I would like to do this and then add the nls line
>> qplot(TSS, GPP, data=r,
>> shape=as.factor(RiverMile))+scale_shape_manual(values=1:9)
>>
>> #how do you undo the mapping of shape to add a line is my question
>> #thanks
>
> + geom_line(aes(shape = NULL))
>
> Alternatively you can use the full ggplot specification, and only
> supply shape to the points:
>
> ggplot(r, aes(TSS, GPP)) +
> geom_point(aes(shape = factor(RiverMile)) +
> geom_line(data = pred) +
> scale_shape_manual(values = 1:9)
>
> Hadley
>
> --
> http://had.co.nz/
>
--
Stephen Sefick
Research Scientist
Southeastern Natural Sciences Academy
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
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