Victor K.
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 Apr 30 comment Detecting patterns of black and white stones on a 2D board @Mr.Wizard - thanks for the pointer, I have somehow missed it. Apr 27 comment Detecting patterns of black and white stones on a 2D board I had a hard time choosing between your solution and Mr.Wizard's, but I decided to go with his as it can be better generalized for a 2D (not linear) patterns, which strictly speaking was my original question, even though for my needs linear patterns will probably be enough. I'm still very grateful for you sharing your solution - I think I'm finally starting to appreciate the beauty of Reap and Sow. Apr 27 comment Detecting patterns of black and white stones on a 2D board @Mr.Wizard - do you know a good place to read more about CellularAutomaton? The built-in documentation is quite sparse - I don't fully understand what each of the different types of rule mean. I have Wolfram's NKS, but I've only read through first couple of chapters - is it described there? Apr 27 comment Detecting patterns of black and white stones on a 2D board Ok, I fully understood your solution, and it's beautiful. I can see now how I can add diagonal and non-linear patterns, too. Apr 25 comment Detecting patterns of black and white stones on a 2D board @Pellesatansfant - thanks for the effort, but as the others have pointed out already, your solution is probably not very useful to me, for two reasons: 1) I want a Mathematica solution, and 2) Your solution doesn't really allow to define new patterns easily. Apr 25 comment Detecting patterns of black and white stones on a 2D board Is there a way to define new patterns easily, similar to my matchPattern below? Apr 25 comment Detecting patterns of black and white stones on a 2D board Thanks George - and +1 for a nice reversi visual. It looks like what you are suggesting here is somewhat similar to my solution below, but I would need to spend some time to truly understand what you are doing there. Apr 25 comment Detecting patterns of black and white stones on a 2D board Thanks Mr. Wizard. Although it doesn't fully answer my question, it is very inspirational. I will try to wrap my head around some of the new idioms that you are showing here over the weekend. Apr 18 comment Few quick Mathematica questions about Dictionary Need to go, but I'm sure you'll solve it now. Apr 18 comment Few quick Mathematica questions about Dictionary Great. Of even Flatten[con] will work. Now you know how to flatten first element of your list pl. What would you do to apply it to every element of your list pl? Hint: read my answer above. Apr 18 comment Few quick Mathematica questions about Dictionary Can you flatten this list: {1, {"Finnish", 728498}}? This is the first element of your pl. Apr 18 comment Few quick Mathematica questions about Dictionary This is certainly what you need to achieve, but can you rephrase it in terms of which lists you need to flatten? Can you give me an example? Apr 18 comment Few quick Mathematica questions about Dictionary That's right. It flattens a list to a certain level. Now, what do you need to flatten? Apr 18 comment Few quick Mathematica questions about Dictionary Let's read Flatten documentation together. What does it do? Apr 18 comment Few quick Mathematica questions about Dictionary If you want to get help, you would first need to explain: 1) What have you tried (with code); 2) What do you expect; 3) What did you receive instead. You don't need to use Flatten to solve (b) - just try to read and understand the section D above. Apr 18 comment RSolve fails on a two-equation non-linear system Note that H + h == 1 as per the question, but you have H[0]+h[0] != 1, and also since these are frequencies, H <= 1. Oct 10 comment Help find a bright object on Mars! Yes, I now realized that - and I gave the accepted answer to @nikie, hope you don't mind :). Oct 10 comment Help find a bright object on Mars! Excellent, thanks! Oct 10 comment Help find a bright object on Mars! Great tip, @RahulNarain - extracting saturation does certainly bring it up. I agree that it's not that bright. Jun 12 comment Proving inequalities with Mathematica @halirutan - thanks! I was wondering how other people do it, now I know.