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 Yearling
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  • 8 votes cast
May
20
comment Simple way to concatenate Dataset columns
I am actually surprised that Join works on Dataset-s, since the documentation states that Join works Association objects (in Details). There is no mention of Dataset-s.
May
19
comment Simple way to concatenate Dataset columns
+1. I regard the Association[.] as the more fundamental data structure and I use Dataset[.] as a mere wrapper to limit large outputs.
May
4
awarded  Yearling
Apr
17
comment Export PDF margins different in V9 & V10 compared with version 7
A4 paper is 595x842 printer points and your ImageSize->{x,y} is larger than that. So the Graphics must be scaled to fit onto one physical A4 page. Mathematica version 8.0 gives the same result as your version 9 image.
Feb
14
comment Computational Bayesian analysis in Mathematica: Any plans to develop MCMC?
I don't know whether WRI has any plans for developing MCMC. However, Phil Gregory has developed a MCMC package in Mathematica. You can download it at bit.ly/1tdaYhG under "Resources". BTW, I can recommend his book "Bayesian Logical Data Analysis for the Physical Sciences" in which he explains MCMC at length.
Jan
9
awarded  Commentator
Jan
9
comment How to obtain the best possibe NonlinearFit
This is actually a linear fit. Since model2 is linear in the parameters {a,b,...,f}. You get the same solution with: Normal@LinearModelFit[data, {1,x,x^2,x^3,x^4,x^5}, x].
Jan
9
comment How to obtain the best possibe NonlinearFit
Is there a typo in the model? Since a+b/(c*x^2) is essentially the same as a+b/x^2. Do you mean a+b/(c+x^2)?
Dec
22
comment Interpretation of CopulaDistribution
The last example has a typo "Abx" instead of "Abs", which explains the error.
Dec
22
answered Interpretation of CopulaDistribution
Dec
21
comment Buying a new computer (specifically for Mathematica)
The performances of Mr.Wizard's or Halituran's machines are difficult to beat. Just for comparison, I use a 13" Retina Macbook Pro (type Late 2013) with 2.8 GHZ Intel Core i7 CPU (2 cores, 4 hyperthreads) and 16 GB SSD. The Mathematica 10.0.2 Benchmark[] yields a performance of 1.426 .
Nov
23
answered Mathematica learning resource dealing with bayesian inference
Jul
4
awarded  Autobiographer
Jul
4
comment Calculating probabilities symbolically
The only example I ever encountered of a symbolic evaluation of Bayes equation is by Gregory Klopper in this link.
Jun
23
awarded  Nice Answer
May
4
awarded  Yearling
Jan
31
revised Better way to get Fisher Exact?
deleted 6 characters in body
Jan
31
answered Better way to get Fisher Exact?
Dec
13
answered Discrete ColorData scheme with n colors?
Oct
13
answered Why do NumberForm and Round apparently use different tie-breaking methods?