I've now tried Babtiste's code and my reaction is WOW! it shows me how to
do just what I need to do. I know enough to follow all the code but it
would have taken me a LOOO time to generate it. thank you Babtiste!
gary
On Sat, Aug 21, 2010 at 2:15 PM, baptiste auguie <
baptiste.aug...@g
many useful suggestions that I'll work on, especially babtiste's detailed
code. yes, I want something like Fig 1.7, or 7.18, or 7.22, but where the
x,y values are characteristics of the mini-histogram that is plotted.
attached (if it makes it through) is what i'm trying to do in R.
On Sat, Aug
I want to make a graph where each element plotted is itself a graph. I can
see how to use par(fig=) and viewport to do that, but they require (i think)
me to do my own scaling as they are scaled to the graphics window. any
advice on which approach I should take (just bite the bullet and do my own
I'm sure this must be a nls() newbie question, but I'm stumped.
I'm trying to do the example from Draper
and Yang (1997). They give this snippet of S-Plus code:
Specify the weight function:
weight < - function(y,x1,x2,b0,b1,b2)
{
pred <- b0+b1*x1 + b2*x2
parms <- abs(b1*b2)^(1/3)
(y-pred)/parms
I'm sure this must be a nls() newbie question, but I'm stumped.
I'm trying to do the example from Draper
and Yang (1997). They give this snippet of S-Plus code:
Specify the weight function:
weight < - function(y,x1,x2,b0,b1,b2)
{
pred <- b0+b1*x1 + b2*x2
parms <- abs(b1*b2)^(1/3)
(y-pred)/parms
Hi Arin,
Others have commented wisely an your first issue. As for your 2nd issue, I
had my own concerns about using R in undergraduate teaching because I had
always used a point-and-click program for that level. I should not have
worried. The current generation has been typing on their keyboards
I just got a copy of
A First Course in Statistical Programming with R by W. John Braun and Duncan
J. Murdoch. Cambridge. at amazon:
http://www.amazon.com/First-Course-Statistical-Programming-R/dp/0521694248/
first couple of chapters are base R that most everyone would know before
wanting to pro
Hi Dani,
it would be better to start with a question you are trying to ask of your
data rather than trying to figure out what a particular function does. with
your variables and model, even if the component terms were not significant,
they must in the model or the product of sunlight and aspect wi
I have R on all sorts of Macs, including one's a lot whimpier than the one
you are describing and it works great on all of them.
gary mcclelland
colorado
On Sat, Feb 9, 2008 at 6:29 PM, Maura E Monville <[EMAIL PROTECTED]>
wrote:
> I saw there exists an R version for Mac/OS.
> I'd like to hear fr
It is easy to worry too much about using numbers to represent order when
using statistics like the correlation. this little example shows that the
correlation is essentially a rank-order correlation itself:
> x <- 1:20
> y <- x^2
> cor(x,y)
[1] 0.9713482
x and y are definitely not linearly relate
A young colleague (Matthew Keller) who is an ardent fan of R is teaching me
much about R and discussions surrounding its use. He recently showed me
some of the sometimes heated discussions about Type I and Type III errors
that have taken place over the years on this listserve. I'm presumptive
eno
On Thu, Feb 7, 2008 at 1:06 PM, John Kane <[EMAIL PROTECTED]> wrote:
> ?chisq.test
> --- jinjin <[EMAIL PROTECTED]> wrote:
>
> >
> > for example, an expression such as chisq(df=1,ncp=0)
> > ?
> >
perhaps pchisq(chisqvalue, df=1, ncp=0) is what you are looking for to
evaluate the probability for
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