stat_summary question

[Adam_L...@keybank.com]

I'm not sure what the issue here is. Am I missing something? The following does not generate a line connecting the means for each level of x, as I would expect (right or wrong). Any ideas? Thanks.

tst.data <- data.frame (x = c(rep("Blue",500), rep("Red",500)), y =c(rnorm(500,3,6), rnorm(500,8,4) ) )
ggplot ( data = tst.data,aes(x,y)) + geom_point(alpha = .3) + stat_summary(fun.y = "mean",geom = "line")




Adam Loveland




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[Adam_L...@keybank.com]

Nevermind! Figured it out. Thanks!


Adam Loveland

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[Kohske Takahashi]

hi,

geom_line connects data points of the same group, so try this:

ggplot ( data = tst.data,aes(x,y, group=1)) + geom_point(alpha = .3) +

stat_summary(fun.y = "mean",geom = "line")

--
Kohske Takahashi <takahash...@gmail.com>

Research Center for Advanced Science and Technology,
The University of  Tokyo, Japan.
http://www.fennel.rcast.u-tokyo.ac.jp/profilee_ktakahashi.html

[Adam_L...@keybank.com]

Was having trouble labelling the mean that's calculated using stat_summary. Taking initial example (now with group added; thanks Kohske),

tst.data <- data.frame (x = c(rep("Blue",500), rep("Red",500)), y=c(rnorm(500,3,6), rnorm(500,8,4) ) )

ggplot ( data = tst.data,aes(x,y)) + geom_point(alpha = .3) +

stat_summary(aes(group=1),fun.y = "mean",geom = "line")

Above works.

tst.data <- data.frame (x = c(rep("Blue",500), rep("Red",500)), y=c(rnorm(500,3,6), rnorm(500,8,4) ) )

ggplot ( data = tst.data,aes(x,y)) + geom_point(alpha = .3) +

stat_summary(aes(group=1),fun.y = "mean",geom = "line") +
stat_summary(aes(group=1),fun.y = "mean",geom = "text")

This doesn't. It asks for the label, but I'm not sure how to add it (adding it as I would a usual aesthetic doesn't work). And of course, once I add it, I'd like to be able to format it somehow (e.g. dollar).

Thanks again.



Adam Loveland

From:        Kohske Takahashi <takahash...@gmail.com>
To:        Adam_L...@keybank.com
Cc:        ggp...@googlegroups.com
Date:        09/26/2011 12:01 PM
Subject:        Re: stat_summary question
Sent by:        ggp...@googlegroups.com

---

[Hadley Wickham]

I'd really recommend doing the summarise yourself - you'll have much
more flexibility.
Hadley

--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/