Displaying 20 results from an estimated 2000 matches similar to: "Model Validation & Floating Attributes"
2010 Jan 01
1
Questions bout SVM
Hi everyone,
Can someone please help me in these questions?:
1)if I use crossvalidation with svm, do I have to use this equation to calculate RMSE?:
mymodel <- svm(myformula,data=mydata,cross=10)
sqrt(mean(mymodel$MSE))
But if I don’t use crossvalidation, I have to use the following to calculate RMSE:
mymodel <- svm(myformula,data=mydata)
mytest
2018 May 18
3
Exporting to text files
I have dose response data analyzed with the package 'drc'.
'summary(mymodel)' prints my kinetic parameters. I want
that text in an ASCII text file. I want to get exactly what I
would get if I copied and pasted from the terminal window.
I've read the documentation on data export to text files here:
2008 Apr 17
1
How to extract vectors from an arima() object and into a data frame?
This should be very easy, but alas, I'm very new to R. My end goal is to
calculate p-values from arima().
Let's say I just ran this:
> MyModel <- arima(y[1:58], order=c(1,0,0), xreg=MyData[1:58,7:14],
> method="ML")
> MyModel
And I see:
arima(x = y[1:58], order = c(1, 0, 0), xreg = MyData[1:58, 7:14], method =
"ML")
Coefficients:
ar1
2006 Nov 16
2
dynamically adding static (class) methods to a class
Hello again,
I guess this is more of a Ruby question, but here goes anyways...
I want to intercept all calls to non existent class methods and then
call an existing class method with the non existent name.
In code...
class MyModel < ActiveRecord::Base
def MyModel.method_missing(symbol, *args)
MyModel.func(symbol.id2name)
end
def MyModel.func(func_called)
puts "You
2018 May 18
0
Exporting to text files
?sink
On May 18, 2018 9:47:25 AM PDT, Ed Siefker <ebs15242 at gmail.com> wrote:
>I have dose response data analyzed with the package 'drc'.
>'summary(mymodel)' prints my kinetic parameters. I want
>that text in an ASCII text file. I want to get exactly what I
>would get if I copied and pasted from the terminal window.
>
>I've read the documentation on
2006 May 04
1
Instance or local vars for field helpers in partial template
I''m getting confused.
If I have a view (.rhtml), I can use a field helper like:
<%= text_field :mymodel, :attribute %>
This uses the value from @mymodel.attribute
Now, if I am rendering a template normally (i.e. not partial), I would
expect @mymodel to be a model object defined as an instance variable in
the controller.
However, if I am rendering a partial template, I
2012 Oct 31
2
Problema con la función lm
Buenos días:
Tengo un determinado código en R que en una máquina funciona correctamente, pero en otra devuelve un error del tipo "Error en as.formula(mymodel): Objeto ''mymodel'' no encontrado''"
En mi código:
mymodel <- "y ~ x1[, 1] + x2[, 1]"
res <- lm (as.formula(mymodel))
¿Qué puede estar motivando ese error?. La máquina en la que falla
2013 May 21
1
Calculating AIC for the whole model in VAR
Hello!
I am using package "VAR".
I've fitted my model:
mymodel<-VAR(mydata,myp,type="const")
I can extract the Log Liklihood for THE WHOLE MODEL:
logLik(mymodel)
How could I calculate (other than manually) the corresponding Akaike
Information Criterion (AIC)?
I tried AIC - but it does not take mymodel:
AIC(mymodel)
# numeric(0)
Thank you!
--
Dimitri Liakhovitski
2010 Dec 29
2
Referring to an object name from within a function
Can anyone show me how to refer to an object name that is passed to a
function, from within the function?
For example:
MyModel <- 1
test <- function(x) {
if(x == 1) {cat("x is a valid object.\n")}
}
test(x)
What I would like this to do is pass MyModel to function test, and if it
passes a test, be able to print "MyModel is a valid object."
Thanks.
--
View this
2007 Sep 12
3
Can''t disable ferret when running in Mongrel
In my environment.rb I say the following:
MyModel.disable_ferret
puts MyModel.ferret_enabled?
The console works as expected:
script/console
false
>> MyModel.ferret_enabled?
=> false
I can then edit an instance, ferret remains disabled and the changes
are not immediately indexed.
However, when I start mongrel Ferret is initially disabled, but then
somehow becomes enabled again
2005 Apr 24
2
Model names in controllers
Please excuse yet another newbie question...
I''m getting this error:
MissingSourceFile in <controller not set>#<action not set>
c:/program files/ruby/lib/ruby/gems/1.8/gems/actionpack-1.8.1/lib/action_controller/dependencies.rb:75:in `require_dependencies'': Missing model MyModel.rb
From these lines of code:
class MyModelController < ApplicationController
2011 Feb 12
2
Predictions with missing inputs
Dear users,
I'll appreciate your help with this (hopefully) simple problem.
I have a model object which was fitted to inputs X1, X2, X3. Now, I'd like
to use this object to make predictions on a new data set where only X1 and
X2 are available (just use the estimated coefficients for these variables in
making predictions and ignoring the coefficient on X3). Here's my attempt
but, of
2009 Sep 03
1
Help with GLM please!
Dear experts,
I have a few quick questions related to GLMs:
1) Suppose my response is of the type Yes/No, How can I control which
response I'm modelling?
2) How can I perform Type III tests? Is it with -> drop1(mymodel,
test="Chisq") ?
3) I have a numerical variable which I converted to an ordered factor as
shown below, but in the summary results of the logistic regression I
2008 Jul 28
1
callback executed like after_save but after transaction
I''m trying to add some code for my ActiveRecord class so that it is
executed whenever an object is updated, this code is a seperate
process that reads from the same table represented by my model class
so when it runs it needs the database to be up to date.
In the following situation this is fine:
# MyModel
def after_save
`/usr/local/bin/update_models -i #{self.id}`
end
# controller
2010 Oct 29
2
how to debug (mtrace) a function defined inside a function?
Hi, everyone. I am using a fair amount of closures in my code. Problem i am
experiencing is i cannot figure out how to mtrace functions defined within a
function. There must be some way to name such function for mtrace to see it
and let me step into it. For example, say i have code
mymodel<-function(){
data<-numeric(0)
build<-function(){
data<<-1
}
m<-list()
2013 May 01
2
Factors and Multinomial Logistic Regression
Dear All,
I am trying to reproduce the example that I found online here
http://bit.ly/11VG4ha
However, when I run my script (pasted at the end of the email), I notice
that there is a factor 2 between the values for the coefficients for the
categorical variable female calculated by my script and in the online
example.
Any idea about where this difference comes from?
Besides, how can I
2010 Nov 22
3
save a regression model that can be used later
Hi everyone
I have a question about how to save a regression model in R and how to retrieve it for making predictions in a new session.
To be more specific, I fitted a multilevel logistic regression model using the lmer from the "lme4" package. I then successfully make predictions using fitted(mymodel).
Since data are complex (three levels, nested, numerous categorical and
2001 Dec 22
2
gam plots
Dear R users,
Using the library(mgcv) and running R under MacOSX, I have fitted a
generalised additive model with binomial errors in order to check the
linearity of two continuous variables ap2mm and diffdaysm in a glm:
> mymodel.gam <- gam(diedhos~ s(ap2mm) + Dweekm + s(diffdaysm) +
Dweekm:diffdaysm + ap2mm:Dweekm, binomial)
I would like postscript gam plots for the two smoothed
2012 Mar 22
1
why doesn't .where() honor polymorphism?
I love the query interface (ActiveMethod::QueryMethods), but one thing
has bugged me: why doesn''t it generate calls for polymorphic
associations? For example:
class MyModel < ActiveRecord::Base
belongs_to :parent, :polymorphic => true
end
I would expect:
MyModel.where(:parent => a)
to be equivalent to:
MyModel.where("my_models.parent_id = ? AND
2008 Dec 31
1
when to set a class attribute variable during boot
I have an ActiveRecord model with a cattr_accessor. The class
attribute is set up like this:
class MyModel < ActiveRecord::Base
cattr_accessor :my_attribute
end
Because I need to give #my_attribute environment-specific values, I
try to set this attribute in environments/development.rb like so:
MyModel.my_attribute = 3
But this leads to odd and erratic behavior when #my_attribute is
called