new to R and you don't really know where the
problem is.
On Wed, 11 Oct 2006, Martin C. Martin wrote:
Hi,
First of all, thanks for the great work on R in general, and MASS in
particular. It's been a life saver for me many times.
However, I think I've discovered a bug. It seems
Hi,
First of all, thanks for the great work on R in general, and MASS in
particular. It's been a life saver for me many times.
However, I think I've discovered a bug. It seems that, when I use
weights during an initial least-squares regression fit, and later try to
add terms using
I think the colClasses argument to read.table() is what you need.
Either that, or explicitly cast columns in the data.frame that's
returned by read.table(). That's how you get data types that aren't
directly supported by read.table(), like various date formats.
- Martin
January Weiner wrote:
Hi all,
update.default, which is the method used to update lm objects (among
others), extracts the call element from it's first argument, updates
it, then evaluates it in the parent.frame(). Shouldn't it be evaluated
in environment(formula(object)), if that's non-NULL?
I ask because I call lm
be better default behavior than the formula's environment.
- Martin
On 10/10/06, Martin C. Martin [EMAIL PROTECTED] wrote:
Hi all,
update.default, which is the method used to update lm objects (among
others), extracts the call element from it's first argument, updates
it, then evaluates
Great; thanks for the detailed explanation!
- Martin
Thomas Lumley wrote:
On Tue, 10 Oct 2006, Martin C. Martin wrote:
Thanks, or even just:
e - environment(formula(f.lm))
But this was more of a bug report. Is update.default wrong? Should it
be changed? I don't see how evaluating
Hi,
In the Linux (FC3) version of R, ctrl-\ quits R. This wouldn't be so
bad, but on my keyboard, it's right next to ctrl-p and I tend to hit it
by accident.
Is there any way to turn that off?
Best,
Martin
__
R-help@stat.math.ethz.ch mailing list
previous command. Very helpful when you want to repeat something you
recently did, perhaps after modifying it a bit.
- Martin
Alberto Monteiro wrote:
Martin C. Martin wrote:
In the Linux (FC3) version of R, ctrl-\ quits R. This wouldn't be
so bad, but on my keyboard, it's right next
Thanks! I put it in my .bashrc, now it will never bother me again.
Marc Schwartz (via MN) wrote:
BTW, you might want to consider updating your FC distro, as FC3 is now
EOL
Unfortunately, this is my work machine and they're still using FC3.
Although I've heard various grumblings about it,
Hi,
I have a 5x731 array A, and I want to compute the sums of the columns.
Currently I do:
apply(A, 2, sum)
But it turns out, this is slow: 70% of my CPU time is spent here, even
though there are many complicated steps in my computation.
Is there a faster way?
Thanks,
Martin
Thanks everyone.
Gavin Simpson wrote:
But neither is that slow on my system. What is A?
It's in the middle of a loop. I'm doing some maximum likelihood
estimation, and having to evaluate my model over and over again for
different parameter values.
Thanks,
Martin
Liaw, Andy wrote:
From: Martin C. Martin
Hi,
I have a bunch of data points x from two classes A B, and
I'm creating
a classifier. So I have a function f(x) which estimates the
probability
that x is in class A. (I have an equal number of examples of
each, so
p(class) = 0.5.)
One way
Hi,
Trying this:
deriv(expression(sum(x)), x)
Gives the error message:
Function 'sum' is not in the derivatives table
I'd like to add it, is this difficult? If not, where is the derivatives
table?
However, give how basic sum is, I suspect it would have been added if
it were
Rolf Turner wrote:
deriv(expression(sum(x)), x)
does not make any sense.
Good point. But this does:
deriv(expression(sum(log(a*x))), a)
where a is a scalar.
- Martin
[[alternative HTML version deleted]]
__
The R for Windows FAQ has many useful tips, including this one:
http://cran.r-project.org/bin/windows/base/rw-FAQ.html
It's well worth at least reading the contents, so you know what
questions it can answer.
- Martin
Duncan Murdoch wrote:
On 8/4/2005 11:39 AM, Shengzhe Wu wrote:
and how
Hi,
I have a variable m that contains the number of minutes that something
lasted, e.g.
m - 139
I'd like to convert it to a difftime, so I can add it to the POSIXct
start time. But as.difftime seems to want a character string, with at
most two characters for the minutes. All other conversion
Hi,
I've written a function:
myfun - function(x, y) {
// blah blah
}
and I want to graph it. My plan is to use persp(), and my question is:
how do I create the array of values? One possibility is:
x - seq(0, 10, by=.1)
y - seq(0, 10, by=.1)
inputs - somehow create an array of x,y pairs
try:
source(fhv.R)
David Reinke wrote:
I created an R function offline with a text editor and saved it as fhv.R
When I type in
load(file=fhv.R)
I get the message
Error: bad restore file magic number (file may be corrupted)-- no data
loaded
I've checked the file, and it opens up fine in Notepad
hist is lumping things together.
Try:
sum(temp == 0)
compare to the height of the left most bar.
Is this a bug in hist?
- Martin
mirage sell wrote:
Hi everyone, I need help.
I want to have a uniform kind distribution. When I used sample
function I got almost twice many zeros compared to other
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