carlosayam
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 Feb 16 comment Why does Mathematica evaluate Sin[2.0] but not Sin[2]? Funnily enough, @DonComo, this N[Sin[2], 2]^2 + N[Cos[2], 2]^2 == 1 is True, although you may get a very different result in traditional programming languages. Here is what you get in Ruby (irb):  Math.sin(2).round(2)**2 + Math.cos(2).round(2)**2 == 1 => false. The reason is that Mathematica keeps track of precision and, at the level of precision requested, the two expressions are the same :) Feb 16 comment Measuring fractal dimension of natural objects from digital images @VitaliyKaurov, glad you liked it. Note that Viola & Jones rightly pointed out a link between integral image and Haar wavelet basis in their paper; although this wasn't explored further. It is unclear to me the link between the paper you mentioned and fractal dimension, but certainly worth reading as I am interested in these kind of problems. Cheers. Feb 13 awarded Tumbleweed Feb 6 asked How to keep labels inside the box in BarChart3D Feb 1 accepted Better way to get Fisher Exact? Feb 1 comment Better way to get Fisher Exact? Unexpected but interesting answer. Acknowledged as promised! Jan 31 answered BarChart3D does not print zeros and odd tick positions Jan 31 comment Better way to get Fisher Exact? Thanks a lot @romke-bontekoe. This is for someone who expects/needs p-values as practiced usually in medicine research, i.e. from a frequentist point of view. Do you know any support of this Bayesian view in medicine/genetics? Interestingly enough, your examples are suitable for Pearson's $\chi^2$, although the test in this context is whether one has an expected matrix having the same row and column sums as the data or not. In a Bayesian view, prior knowledge of both, row and column sums, right? Again, thanks, very interesting! Jan 31 revised Better way to get Fisher Exact? Algorithm explained with an example. Jan 31 revised Better way to get Fisher Exact? Code placed in github. Jan 31 asked Better way to get Fisher Exact? Jan 30 revised BarChart3D does not print zeros and odd tick positions added 35 characters in body Jan 30 comment BarChart3D does not print zeros and odd tick positions @Murta, I haven't received an email to upgrade, I have 9.0.0.0 on Mac. Maybe I should contact Wolfram. Jan 30 comment BarChart3D does not print zeros and odd tick positions Thanks @Mr.Wizard, I have version 9.0.0.0 and it seems behaviour changed. I am happy with my workaround tough. If you can shed light on how to place the labels I will give you the answer; my current manual placing is not portable to other NxM matrices, which is bad. Cheers! Jan 30 revised BarChart3D does not print zeros and odd tick positions Found workaround. Jan 30 asked BarChart3D does not print zeros and odd tick positions Jan 25 comment Is it possible to embed a cdf file into a GitHub Page In addition to the embedding code, one usually needs to ensure the webserver sends the right MIME type. And afaik, github does not allow this, see Jan 19 comment Data acquisition from a Measurement Computing USB device Have you seen the device interface? And this guide? Jan 16 comment Pattern matching Good! Note that as said in the guide "/" is also not a built-in. You may also want to explore commutativity and associativity, Orderless and Flat properties in Mathematica terms; and OneIdentity, which is Mathematica 's way to say that Plus[x] is just x, kind of saying that Plus has an identity element without mentioning it. See here Jan 16 revised Pattern matching added 96 characters in body