Dear friends,
I searched the R site and found a lot of results on general linear model
and generalized linear model , and i was confused by them. Here, I only want
to get some concise answers on the following questions and i'll study it by
your hints:
1. Which function(package) could be used to
Folks,
A few days ago, I had asked a question on this mailing list about
making a contour plot where a function z(x,y) is evaluated on a grid
of (x,y) points, and the data structure at hand is a simple table of
(x,y,z) points. As usual, R has wonderful resources (and subtle
complexity) in doing
- Oorspronkelijk bericht -
Van: zhijie zhang [mailto:[EMAIL PROTECTED]
Verzonden: zaterdag, juli 1, 2006 08:50 AM
Aan: r-help@stat.math.ethz.ch
Onderwerp: [R] general linear model and generalized linear model
Dear friends,
I searched the R site and found a lot of results on general
maybe not directly, as it's returning the hat/influence/smoother matrix
rather than the model/design matrix itself... however a similar trick
which manipulated the `fit$coef' component of a single spline fit and then
predicted from this at the x values would be one way of extracting the
model
Dear all,
I have a question on how to set up the starting model in POLYCLASS and
make sure the terms in the starting model retained in the final
POLYCLASS model.
In the function POLYMARS, this can be done using the STARTMODEL option.
See below for example, I started with model
y= b0 + b1*X1 +
I think this will do what you want:
dframe - read.table(your.text.file, other args as needed )
mat - tapply(dframe[,3],dframe[,1:2],c)
On Fri, 30 Jun 2006, Wade Wall wrote:
I have a text file that I have imported into R. It contains 3 columns and
316940 rows. The first column is
yyan == yyan liu [EMAIL PROTECTED]
on Fri, 30 Jun 2006 21:11:31 -0700 (PDT) writes:
yyan Hi: I have two vectors of data, x and y and I want to
yyan get the polynomial expansion of (x+y)^p with any
yyan integer power p in R. Suppose p=2, then I want a
yyan matrix of five
Dear listers,
I am trying to model the distribution of fox density over years in the
Doubs department. Measurements have been taken on 470 plots in March
each year and georeferenced. Average density is supposed to be different
each year.
In a first approach, I would like to use a general
I just read paul murrell's new book, R graphics.
now, I have always used the traditional graphics system. apparently,
the new (trellis?) system is an entirely separate graphics system.
after reading the book, I cannot figure out what the intrinsic
capability advantage of the old graphics system
Hello, a beginner R user - boy i wish there was a book on just data
manipulations for SAS users learning R (equivalent to the SAS DATA
STEP).. Okay, my question:
I have a panel data set, hotel data occupancy by month for 12 months,
1000 hotels. I have a field labeled 'year' and want to
zubin wrote:
Hello, a beginner R user - boy i wish there was a book on just data
manipulations for SAS users learning R (equivalent to the SAS DATA
STEP).. Okay, my question:
I have a panel data set, hotel data occupancy by month for 12 months,
1000 hotels. I have a field labeled
Zubin,
I bet you are working for intercontinental hotels and think you probably are
not the real Zubin there. right? ^_^. If you have chance, could you please
say hi to him for me?
Here is a piece of R code I copy from my blog side by side with SAS. You
might need to tweak it a little to get
Dear friends,
i have a dataset like this:
x y z
1 2 3
2 3 1
3 2 1
1 1 3
2 1 2
3 2 3
2 1 1
I want to replace x with the following values:1-a,2-b,3-c,4-d;
replace y with the following values:1-b,2-a,3-c,4-d;
replace z with the following values:1-d,2-c,3-b,4-a;
I'm a bit new to writing R functions and I was wondering what the best
practice for having optional variables in a function is, and how to test
for optional and non-optional variables? e.g. if I have the following
function:
helpme - function(a,b,c) {
}
In this example, I want c to be an
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