Displaying 20 results from an estimated 5000 matches similar to: "strange bahaviour of predict.lm"
2020 Mar 17
0
strange bahaviour of predict.lm
Hello,
I'm glad that it worked.
Two things:
1. Please, click reply all to keep this threaded.
2. The question should have belonged to r-help at r-project.org, not to
r-devel at r-project.org.
Rui Barradas
?s 07:10 de 17/03/20, Moshe Olshansky escreveu:
> It works, thank you!
>
> On Tuesday, 17 March 2020, 5:47:05 pm AEDT, Rui Barradas
> <ruipbarradas at sapo.pt> wrote:
2020 Feb 18
2
Possible Regression in setClassUnion between 3.5.0 and 3.6.0
I am trying to create a class union of class unions to facilitate method
dispatch. When I execute code in the global environment, everything acts as
expected, however when I put the same code in the context of a package,
selectMethod can no longer find the correct method. This first block below
puts the code in the context of a package:
fn <- "codefile.R"
writeLines(
c(
2008 Jan 21
5
"nonstandard" column names
Hi everyone,
I am sure that this question has been asked here some
time ago but I do not remember the answer and was
unable to find it in the archives...
Below is my question: suppose that I have a data.frame
x and one of it's columns name is "CPI/RPI" (without
quotation marks of course). How can I reference this
column? Neither of x$CPI/RPI or x$"CPI/RPI" work. I
2007 Mar 23
6
Updating a worksheet in Excel file using RODBC
Hello!
I have no problem reading Excel files (each worksheet in the file is a "table" which can be read - at least in my case).
What I would like to do is to read such a table, change it (just the contents, not the format) and write it back, and this I can not do. I am getting the following error messages (3 slightly different attempts):
> sqlSave(con, x, tablename =
2007 Jun 14
3
Responding to a posting in the digest
Is there a convenient way to respond to a particular
posting which is a part of the digest?
I mean something that will automatically quote the
original message, subject, etc.
Thank you!
Moshe Olshansky
m_olshansky at yahoo.com
2020 Feb 19
2
Possible Regression in setClassUnion between 3.5.0 and 3.6.0
Thanks, I'll look into it.
On Tue, Feb 18, 2020 at 8:32 AM Ezra Tucker <ezztucker at gmail.com> wrote:
>
> Hi Robert,
>
> This looks like a bug to me (tested in R 3.6.2 on Windows), f(new("a"))
> should return "hi!". I'll add that this DOES work properly in 3.6.1
> which leads me to suspect this could be due to the subtle change in the
> way
2019 Dec 27
2
"simulate" does not include variability in parameter estimation
Hello, All:
????? The default "simulate" method for lm and glm seems to ignore the
sampling variance of the parameter estimates;? see the trivial lm and
glm examples below.? Both these examples estimate a mean with formula =
x~1.? In both cases, the variance of the estimated mean is 1.
??? ??????? * In the lm example with x0 = c(-1, 1), var(x0) = 2, and
2005 Sep 07
1
solving a system of nonlinear equations
What is the "classic" R function for solving a (possibly over
determined) system of non-linear equations?
Thank you!
Moshe Olshansky
e-mail: moshe.olshansky@brevanhoward.com
The information transmitted is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or
2008 Jul 10
5
rounding
Hi,
Round(0.55,1)=0.5
Round(2.55,1)=2.6
Can this be right?
Thanks,
Ed
[[alternative HTML version deleted]]
2008 Aug 24
3
Igraph library: How to calculate APSP (shortest path matrix) matrix for a subset list of nodes.
Dear R Users,
I have a network of 25000 total nodes and a list of 500 node which is a
subset of all nodes. Now I want to calculate the APSP (all pair shortest
path) matrix only for these 500 nodes.
I would appreciate any help.
Thanks in advance
Dinesh
--
Dinesh Kumar Barupal
Research Associate
Metabolomics Fiehn Lab
UCD Genome Center
451 East Health Science Drive
GBSF Builidng
University of
2009 Aug 13
3
Solutions of equation systems
Hello all!
Maybe it's a newbie question(in fact I _am_, a newbie), but I hope
you'll find the solution.
I have an equation system which has k equation and n variables (k<n).
I would like to obtain a description of the solutions (which can be the
equation of lines or a plane, or everything else) with the lesser degree
of freedom, obviously using R.
In other words, I would like to
2007 Oct 19
2
Declaring variables in R
Please forgive me if my question is answered in Help
FAQ no. 23481739...
In language like C every variable must be declared
before it can be used.
In VBA, if a variable has not been declared it is
assumed to be of a special type (Variant).
In R (and Matlab) variables do not have to be
declared. This is convenient, but in a large program
one can make a typo which will be extremely difficult
to
2007 Aug 07
5
small sample techniques
If my sample size is small is there a particular switch option that I need to use with t.test so that it calculates the t ratio correctly?
Here is a dummy example?
รก =0.05
Mean pain reduction for A =27; B =31 and SD are SDA=9 SDB=12
drgA.p<-rnorm(5,27,9);
drgB.p<-rnorm(5,31,12)
t.test(drgA.p,drgB.p) # what do I need to give as additional parameter here?
I can do it manually but
2020 Feb 26
1
Possible Regression in setClassUnion between 3.5.0 and 3.6.0
Okay - that makes sense and thanks for looking into this! As an aside, from
R-devel's perspective would you say methods are stabilizing again or do you
foresee a lot of changes coming in the 4.* series?
On Tue, Feb 25, 2020 at 3:39 PM Michael Lawrence via R-devel <
r-devel at r-project.org> wrote:
> This seems to work as expected (returning "hi!") in R-devel, but there
2019 Dec 27
1
"simulate" does not include variability in parameter estimation
On 2019-12-27 04:34, Duncan Murdoch wrote:
> On 26/12/2019 11:14 p.m., Spencer Graves wrote:
>> Hello, All:
>>
>>
>> ? ????? The default "simulate" method for lm and glm seems to ignore the
>> sampling variance of the parameter estimates;? see the trivial lm and
>> glm examples below.? Both these examples estimate a mean with formula =
>>
2008 Jul 08
8
Sum(Random Numbers)=100
Hi R,
I need to generate 50 random numbers (preferably poisson), such that
their sum is equal to 100. How do I do this?
Thank you,
Shubha
This e-mail may contain confidential and/or privileged i...{{dropped:13}}
2007 Nov 08
1
finite mixture model (or latent class)
Dear Listers,
My post might be somewhat OT.
Currently, I am trying to use flexmix to build a finite mixture model.
For instance, I am getting the prior probability and coefficients for
each latent class from training data. Is there a way to get the
posterior probablity and prediction of a new dataset?
What I am thinking is to apply the prior prob and coefficient from
training set to testing data
2007 Jun 07
1
Creating an Access (.mdb) database using R
Hello!
I have a short question: Is it possible to create a
(non-existing) Access database using R (and if yes,
how)? I need to create a new database and then insert
a few tables into it.
Thank you in advance,
Moshe Olshansky
m_olshansky at yahoo.com
2007 Jul 19
3
help with heatmap - how to remove annoying "X" before numeric values?
Hello All,
I have a simple question based on how things are labeled on my heat map;
particularly, there is this annoying "X" that appears before the numeric
value of all the labels of my columns.
Let's say I have the following silly data, stored in "temp.txt"
1905 1910 1950 1992 2011 2020
Gnat 0.08 0.29 0.29 0.37 0.39 0.43
Snake
2007 Aug 17
1
[BioC] function to find coodinates in an array
The arr.ind in the which function does the job very nicely!!!
Thank you everyone for the suggestions!
Ana
>
>
>---- Mensaje Original ----
>De: marc_schwartz at comcast.net
>Para: m_olshansky at yahoo.com
>Asunto: Re: [BioC] [R] function to find coodinates in an array
>Fecha: Thu, 16 Aug 2007 21:53:44 -0500
>
>>If I am correctly understanding the problem, I think