All Questions
8 questions
0
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computing the "mix effect" in the evolution of a variable on R
Background:
I am currently working on a dataset representing the evolution of the income of a hospital which hosts several medical specialties.
The ratio income/medical act increases between year $N$ ...
- 1
1
vote
1
answer
6k
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Maximum likelihood estimation of gamma distribution using optim in R
I'm trying to get the shape and scale parameters for this data using the optim function in R.
...
- 69
1
vote
0
answers
690
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Using R to maximize a two parameter Weibull model via multivariate extension of Newton-Raphson method
I am just getting back into using R for the first time in a while, and wrote some code to perform the aforementioned task in the title. I was wondering if anyone could take a look at it and see if ...
- 143
-1
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1
answer
428
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How to build a roc curve and do statistical analysis for discrete classifiers?
I have 5 supervised databases containing S similar documents and N not similar. Within each base, I separated 10 samples with bootstrapping. These samples contain the identifier of each document. For ...
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3
votes
1
answer
735
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simulation of t distribution - repeated sampling
I am new to simulation exercises in R. I want to create 1000 samples of size 25 from a t distribution with degrees of freedom 10.
Do I need to create a single vector of data from the rt generator, ...
- 81
3
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2
answers
7k
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What is the interpretation of positive log-likelihood for discrete time series data?
I use auto.arima function to model the below provided time series data. At the end of the analysis, the best model is given as ARIMA(1,2,1). The log- likelihood=93.69 is positive which is unusual. It ...
- 213
2
votes
0
answers
46
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Confidence Interval for mean difference with non-mutually exclusive 1 to many matches in R
This is somewhat both a programming question, and a stats question. So sorry for the overlap (although it seems that there is a large overlap between the realm of stats and programming of ...
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16
votes
4
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4k
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Who uses R with multicore, SNOW or CUDA package for resource intense computing?
Who of you in this forum uses ">R with the multicore, snow packages, or CUDA, so for advanced calculations that need more power than a workstation CPU? On which hardware do you compute these scripts? ...