I updated/reinstalled ggplot2 and the trouble started...

Hi Hadley,

Many thanks for your reply.

I followed your instruction and got past the point where I
was stuck at.  Namely, I was able to generate a few plots.
But as I came to the second half of section 2.4, where I
wanted to see the behavior of alpha paramter, which I
had apparently misspelled, I encountered another hindrance:

  > qplot (carat, price, data = diamonds, alpha = I(1/10))

  Warning message:
 In grid.Call.graphics("L_points", x$x, x$y, x$pch, x$size) :
   semi-transparency is not supported on this device: reported only
once per page

A plot was generated, but there are tic marks and labels on
each direction, but no plot at all.

I wonder if this is yet another (hidden) package to be updated...
The warning message suggests grid, but I am hesitant to do
something without knowing what is what.  I would appreciate
your instruction.

Regards,

Tena Sakai


On May 5, 5:24 pm, hadley wickham <h.wick... at gmail.com> wrote:

Hi Tena,

R isn't very good at detecting when package dependencies also need

be updated, so you probably need to do:

install.packages(c("reshape","plyr"))

And you want

qplot (carat, price, data=diamonds, alpha = I(1/10))

not

qplot (carat, price, data=diamonds, slpha = i(1/10))

Hadley

On Tue, May 5, 2009 at 6:27 PM, tena <tsa... at gallo.ucsf.edu> wrote:

Hi Folks,

I am pretty new to R and I am even newer to ggplot.

I am using R 2.7.1, 2.8.1, and 2.9.0 on linux host and
what I am experiencing holds for all three.

I was just typing a few examples from the chapter 2 of
the book, ggplot2 --Elegant graphics for data analysis.

I typed 3 qplot lines on page 13:

 > qplot (carat, price, data=diamonds, slpha = i(1/10))
 > qplot (carat, price, data=diamonds, slpha = i(1/100))
 > qplot (carat, price, data=diamonds, slpha = i(1/200))

To me, the plot looked identical.  I went to my R library
directory and looked at the date on the ggplot2 directory,
which was April of 2008.  I decided to update the library.
In R, I issued:

 > install.packages ('ggplot2', '/usr/local/Gallo/R')

and there was a complaint as to permission denied for
saving the current version (or something).  I reissued
the command as root and this time it gave me a normal
return.

I was ready to retrace my steps with the book.  I only got
to page 11 this time.  Here's what happened (in all three
versions):

 > set.seed (1410)
 > dsmall <- diamonds [sample (nrow(diamonds), 100), ]
 >
 > qplot (carat, price, data = diamonds)

 Error in get("new", env = FacetGrid, inherits = TRUE)
(FacetGrid, ...) :
   could not find function "is.formula"

 >

Can somebody please clue me in as to what's happening,
what I am doing wrong, etc?

Regards,

Tena Sakai
tsa... at gallo.ucsf.edu

--http://had.co.nz/

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