Displaying 20 results from an estimated 1000 matches similar to: "converting matrix in array"
2011 Oct 05
6
reporting multiple objects out of a function
Dear folks,
I?m trying to build a function to create and make available some variables I
frequently use for testing purposes. Suppose I have a function that takes
some inputs and creates (internally) several named objects. Say,
fun1 <- function(x, y, z) {obj1 <- x; obj2 <- y; obj3 <- z
<missing stuff>
}
Here is the challenge: After I run it, I want the objects to be
2005 Jan 11
5
global objects not overwritten within function
Dear useRs,
I have a function that creates several global objects with
assign("obj",obj,.GlobalEnv), and which I need to run iteratively in
another function. The code is similar to
f <- function(...) {
assign("obj",obj,.GlobalEnv)
}
fct <- function(...) {
for (i in 1:1000)
{
...
f(...)
...obj...
rm(obj) #code fails without this line
}
}
I don't understand
2011 Mar 23
2
Estimating correlation in multiple measures data
Dear R-helpers,
This may sound simple to you, but I'm a beginner in this, so please be
forgiving.
I have a following problem: two analytes were measured in patient's
blood on 4 occasions: ProteinA and ProteinB. How to correctly evaluate
correlation between ProteinA and ProteinB?
I tried:
x <- data.frame(Patient.ID=rep(1:10, each=4), Visit=rep(c(1:4),10),
ProteinA=rnorm(m=10,
2006 Jul 07
3
attach and detach question
I have a large R program that I am constantly running over and over again. At the beginning of this program, I create a hige matrix and a huge dataframe but these are constant. What I mean by constant is that, if I run the program over later, I really should just use the old matrix and dataframe ( if they exist ) that were created in a previous run so that the program doesn't have to spend
2004 Jan 16
2
reference to objects
Hi,
is there a way to reference to a data object without copying it?
For example I have a huge matrix called dist and I want two objects
obj1 and obj2 to have a memeber dist that points to the matrix, but
I don't want, for memory reasons, to copy the matrix twice.
As far as I understand the following code will generate three copies
of my data:
dist <- some_code_that_generates_data
1998 May 13
1
all.equal
I need the function all.equal which is in Splus but not yet in R. Below is a
first cut. Comments would be appreciated.
Paul Gilbert
_______
all.equal <- function(obj1, obj2, ...)
{if(mode(obj1) != mode(obj2) ) return("modes differ.")
if(class(obj1) != class(obj2)) return("classes differ.")
if(! all(unlist(attributes(obj1)) ==
2010 May 26
1
problem with not in in subseting dataframe
Hi all,
I have a problem while subsetting a dataframe that is
while I am using *%in%* condition like
*stemp<-subset(temp, obj1 %in% obj2,select=c(temp))*
this is working and giving results that what ever is there is both *obj1*and
*obj2*
**
**
but I want to get values which is there in *obj1* but not in *obj2 *
can anyone help me how to get those values.
i tried with *%o%* but i am not
2001 Oct 01
1
generic default values
I have a generic function
test.equal <- function(obj1, obj2, ...) UseMethod("test.equal")
however, the only argument that specific methods use is "fuzz" so I
would like to change this to
test.equal <- function(obj1, obj2, fuzz=???) UseMethod("test.equal")
The problem is that some methods use slightly different default values
for fuzz than others. How should
2001 Apr 09
4
fastest R platform
Hello, everyone! I picked up R several months ago and have adopted it
as my choice for statistical programming. Coming from a Java
background, I can honestly say that R is not only free, it is better
tha S-plus: the lexical scope in R makes it very simple to simulate
Java's object model. For this, I encourage everyone to read the artcle:
Robert Gentleman and Ross Ihaka (2000) "Lexical
2008 Dec 23
1
.C and 'temporaries'
Hello,
Before I get into troubles I ask here:
I make a call to a C function using .C. What I would like to know is if
the arguments in the .C call can also be 'temporary' objects.
An example will illustrate this:
# here we don't have a temporary
Obj1 = 5
.C("Func", as.integer(Obj1 ), ...) # certainly works
# here we do have a temporary
Obj2 = 5
.C("Func",
2010 Mar 14
3
likelihood ratio test between glmer and glm
I am currently running a generalized linear mixed effect model using glmer and I want to estimate how much of the variance is explained by my random factor.
summary(glmer(cbind(female,male)~date+(1|dam),family=binomial,data= liz3"))
Generalized linear mixed model fit by the Laplace approximation
Formula: cbind(female, male) ~ date + (1 | dam)
Data: liz3
AIC BIC logLik deviance
241.3
2011 Sep 07
1
access objects
hi,
say I have consecutively numbered objects obj1, obj2, ... in my R workspace.
I want to acces one of them inside a function, with the number given as an argument.
Where can I find help on how to do that? Somebody must have been trying to do this before...
Some keywords to start a search are appreciated as well.
Here's an example, I hope it clarifies what I'm trying to do:
obj1 <-
2013 Oct 16
2
How to obtain restricted estimates from coxph()?
Hello,
I'm trying to use coxph() function to fit a very simple Cox proportional
hazards regression model (only one covariate) but the parameter space is
restricted to an open set (0, 1). Can I still obtain a valid estimate by
using coxph function in this scenario? If yes, how? Any suggestion would be
greatly appreciated. Thanks!!!
[[alternative HTML version deleted]]
2013 Sep 06
1
directives to explicitely exclude objects from import into namespaces
Hi,
recently R CMD check --as-cran has noticed some more issues with
package namespace imports with the recommended remedy to
use importFrom() and friends.
In my case, there was only a conflict restricted to some few imports,
while I would prefer to still import all the non-conflicting objects,
methods, and classes of the respective package namespace.
So would it be possible to have some new
2005 Jul 04
3
How difficult is it to wrap a large C++ library with R?
Dear list,
I have developed a forward-time population genetics simulation
environment simuPOP, which is a set of C++ (template)
classes/functions wrapped by SWIG as Python libraries. R is used
extensively as plotting and statistical analysis engine through RPy
package.
I use Python to wrap simuPOP since most the following can be easily
done using SWIG or Python C API. However, since Python is
2005 May 07
1
Test on mu with multivariate normal distribution
Dear WizaRds,
I am sorry to bother you with a newbie question, but although I tried to solve my problem using the various .pdf files (Introduction, help pages etc.), I have come to a complete stop. Please be so kind as to guide me a little bit along my way of exploring multivariate analysis in R.
I want to test wether the means-vector mu1 of X, consisting of the means per column of that matrix
2018 Feb 26
2
lld: order of object files to be put into executable
Hi all!
Is it possible somehow to specify *order* of object files to be put to executable file?
For example, I want to put obj1.o and obj2.o somewhere at the beginning, so when executable file would be mapped
to memory, this code would be accessed quickly.
2020 Jun 19
2
Aliasing and forwarding optimization
----Snip--
struct st1{
int a;
};
struct st2{
int b;
};
struct st {
struct st1 obj1;
struct st2 obj2;
}Obj;
int test1(struct st1 * ptr1 , struct st2 * ptr2, struct st2 *ptr3) {
ptr1->a = 10;
*ptr3 = *ptr2;
return ptr1->a;
}
--Snip---
For the above case GCC is able to store forward the value 10 to the return
place.
LLVM is not doing this.
GCC
https://godbolt.org/z/FCjCXy
LLVM
2008 Jul 16
4
Likelihood ratio test between glm and glmer fits
Dear list,
I am fitting a logistic multi-level regression model and need to test the difference between the ordinary logistic regression from a glm() fit and the mixed effects fit from glmer(), basically I want to do a likelihood ratio test between the two fits.
The data are like this:
My outcome is a (1,0) for health status, I have several (1,0) dummy variables RURAL, SMOKE, DRINK, EMPLOYED,
2012 Apr 24
1
Use of optim to fit two curves at the same time ?
Dear list,
Here is a small example code that use optim and optimize in order to fit
two functions.
Is it possible to fit two functions (like those two for example) at the
same time using optim ... or another function in R ?
Thanks
Arnaud
######################################################################
## function 1
x1 <- 1:100
y1 <- 5.468 * x + 3 # + rnorm(100,0, 10)
dfxy <-