search for: fiwi

Displaying 19 results from an estimated 19 matches for "fiwi".

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2020 Mar 18
2
[GSOC] "Project: Improve inter-procedural analyses and optimisations"
...on AAReachability TODO after solving this > issue. I think the AAReachability TODO is being worked on but #179 not, as far as I know. Would you be interested in taking this one? If so, make sure to split it in multiple smaller patches, starting with one for the LangRef.doc and the Attributor. FIWI, I think we want the attribute to mean 1) below. I note this because 2) is "the opposite" of dereferenceable. 1) the underlying object is at most this large, where the pointer points to doesn't matter. 2) the underlying object has at most X more dereferenceable bytes from...
2009 May 16
3
converting numeric to integer
Hello, Suppose I have x, which is a variable of class numeric. The calculations performed to yield x imply that mathematically it should be an integer , but due to round-off errors, it might not be (and so in either direction). The error is however small, so round(x) will yield the appropriate integer value. Moreover, this integer values is guaranteed to be representable by an
2004 Nov 04
2
problem with tcltk under Windows (was RE: [R] one more Rcmdrproblem)
...r and required packages on Nov. 1, 2004, but that didn't help either. Are there any new insights into these problems? Best regards, Thomas -- Thomas Ruf Institute of Wildlife Ecology University of Veterinary Medicine Vienna, Austria Tel.: *43 1 4890915 150 Fax: *43 1 4890915 550 http://www.fiwi.at/
2007 Sep 15
2
Dovecot Periodically Stops Authenticating Users
Hi, It seems that my dovecot installation periodically stops authenticating users. Restarting dovecot resolves the issue temporarily. I'm authenticating via PAM to OpenLDAP on a CentOS 4 box. I've seen several related posts about this issue but no resolution. My logs show: Sep 15 03:58:24 server01 dovecot: imap-login: Can't connect to auth server at default: Resource
2009 Feb 21
2
difference between assignment syntax <- vs =
Hi, Both operators <- and = can be used to make an assignment. My question is: Is there a semantic difference between these two? Some time ago, I remember I have read that because of some reason, one should be given preference over the other - but I cannot remember the source, nor the argument, nor which operator the preferred was. What is the present state ? Is still one version better
2009 Mar 13
2
changing function argument
Hi, I wonder if the following is possible in R: Suppose a function takes an argument, and wants to modify this argument so that the change is visible _at the call side_. It would be what is for example known as pass-by-reference-to-non-const in C++. test <- function(x) { x <- 10 ... return (somethingElse) # I do NOT want having to return x } number = 5 test(number)
2009 Feb 11
2
generalized mixed model + mcmcsamp
Hi, I have fitted a generalized linear mixed effects model using lmer (library lme4), and the family = quasibinomial. I have tried to obtain a MCMC sample, but on calling mcmcsamp(model1, 1000) I get the following error which I don't understand at all: Error in .local(object, n, verbose, ...) : Update not yet written traceback() delivers: 4: .Call(mer_MCMCsamp, ans, object) 3:
2009 Jul 01
2
'singularity' between fixed effect and random factor in mixed model
Hi, I just came across the following issue regarding mixed effects models: In a longitudinal study individuals (variable ind) are observed for some response variable. One explanatory variable, f, entering the model as fixed effect, is a (2-level) factor. The expression of that factor is constant for each individual across time (say, the sex of the individual). ind enters the model as grouping
2020 Mar 14
3
[GSOC] "Project: Improve inter-procedural analyses and optimisations"
Hi Fahad, > > Improve dynamic memory related capabilities of Attributor. For example > Improve HeapToStackConversions. Maybe such deductions can help safety > (dis)provers. For example, can we improve the use-after-free bug detection > using some attributes? > Stefan should know more about H2S. Regarding the use-after-free, I don't > think there's currently any plans
2009 Jul 01
1
convert factor to indicator matrix
Hi, I am looking for a function which can convert a single factor (a vector), or a list of multiple factors, into the indicator (dummy) matrix with 0/1 entries (or other contrasting schemes). I could cook it myself, but I am actually sure this thing already exists - but forgot the name and package. IIRC it was clearly different from model.matrix, because it had a nicer, more straightforward
2008 Nov 21
0
timezone attribute lost during operations
Hi, I was just *highly* surprised to find out that R 2.8.0 (Windows XP) changes the timezone-interpretation during operations on time data, as apparently the timezone attribute is lost and then, for the next interpretation of the timezone, the system settings are used. Here is sample code (executed under a platform with the system timezone managed by Windows set to "CET", but note
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",
2009 Aug 10
0
ordinal response model with spatial autocorrelation
Hi, [note: 4th posting trial - apologize if the other ones would ever show up...] I have a (3-level) ordinal response data set which needs the integration of an spatial autocorrelation structure. What packages / functions are available to fit such a thing ? The heterogeneous, cluster-alike structuring of the autocorrelation seems to make a mixed effects model with random factors capturing
2012 Oct 31
1
Lavaan model
Dear R-users, Does somebody know what does the "Estimate" reported by the Lavaan model tell us? I assume this tells the relative strength of the dyadic relations. Thank you for your help! Regards, Sylvain -- View this message in context: http://r.789695.n4.nabble.com/Lavaan-model-tp4648004.html Sent from the R help mailing list archive at Nabble.com.
2009 Jun 10
0
MCMC validity question
Hello, I have quite a tough problem, which might be able to be solved by MCMC. I am fairly new to MCMC (in the learning process) - so apologize if the answer is totally obvious, and any hints, links etc are greatly appreciated. I'll illustrate the problem in a version cut-down to the essentials - the real problem is ways more complex. Suppose I have a Markovian series of poisson
2009 Aug 03
1
min frequencies of categorical predictor variables in GLM
Hi, Suppose a binomial GLM with both continuous as well as categorical predictors (sometimes referred to as GLM-ANCOVA, if I remember correctly). For the categorical predictors = indicator variables, is then there a suggested minimum frequency of each level ? Would such a rule/ recommendation be dependent on the y-side too ? Example: N is quite large, a bit > 100. Observed however are
2009 Aug 12
1
MCMC sampling question
Hello, Consider MCMC sampling with metropolis / metropolis hastings proposals and a density function with a given valid parameter space. How are MCMC proposals performed if the parameter could be located at the very extreme of the parameter space, or even 'beyond that' ? Example to express it and my very nontechnical 'beyond that': The von Mises distribution is a circular
2008 Nov 24
1
timezone attribute lost
Hi, As I didn't get any response on the general help list and I don't know if there is a bug in action I am trying my luck here. I was highly surprised to find out that during simple operations (see code below) the timezone attribute for POSIXct data is lost and then, upon the next interpretation, the system settings are used (which are plain wrong in my case). I have used R 2.8.0
2009 Jan 29
3
bootstrapping in regression
Hi, Please apologize if my questions sounds somewhat 'stupid' to the trained and experienced statisticians of you. Also I am not sure if I used all terms correctly, if not then corrections are welcome. I have asked myself the following question regarding bootstrapping in regression: Say for whatever reason one does not want to take the p-values for regression coefficients from the