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 Oct 6 comment xkcd-style graphs @mplungjan - welcome! please feel free to stick around and learn more Mathematica awesomeness :) Oct 4 comment stationary distribution of a transition matrix Welcome to Mathematica.SE, whynot! Please let us know what you tried. In addition, may I suggest: 1) As you receive help, try to give it too, by answering questions in your area of expertise. 2) Read the FAQs! 3) When you see good Q&A, vote them up by clicking the gray triangles, because the credibility of the system is based on the reputation gained by users sharing their knowledge. ALSO, remember to accept the answer, if any, that solves your problem, by clicking the checkmark sign Oct 3 comment Simulating Stochastic Processes the MMA way Welcome to Mathematica.SE, Luap! (Nicely obsfucated username there ;-) ) Have you looked at FoldList? Also note that you can use RandomVariate to get a list of numbers distributed according to a desired distribution. Oct 3 comment Transform an expression into a graph that can be plotted with TreeGraph (not TreeForm) Welcome to Mathematica.SE, scaramouche! Please consider registering your account so that any upvotes you get on this question are added to those you might get on future questions and answers. That way, over time you will be able to do more on the site (post graphics, edit things, do the fandango...). I also formatted your code for you. Here's a guide to show you how for next time. Oct 3 comment How can I forecast time series data with cellular automata? Welcome to Mathematica.SE, ardisun! In case you didn't know, you can format your code better by putting four spaces at the front of every code block (you can use the curly brace button above the editing area), or wrapping short code snippets in backticks . This will make your post easier to read. Oct 2 comment xkcd-style graphs The circle for the head is too perfect - perhaps there needs to be an additional transformation rule? Oct 1 comment How to solve this integral Alexey, welcome to Mathematica.SE! Please consider registering your account so that any upvotes you get on this question are added to those you might get on future questions and answers. That way, over time you will be able to do more on the site (post graphics, edit things, etc). Another tip: after posting a question stay around for a little while, to answer questions raised by commenters. This will streamline the Q&A process considerably. Oct 1 comment xkcd-style graphs To all the new users who have been attracted by this question, we encourage you to stick around and get to know what else Mathematica can do. Oct 1 comment Best Practice for using Notation, $Pre, MakeExpression in a package @NoEscape - I repeat my earlier request to keep it civil. The tone of your comments to rcollyer in particular, as well as to rm-rf, has been completely uncalled for. This has nothing to do with your current reputation and everything to do with your attitude. There is no need to fly off the handle in response to a mildly worded suggestion to make your questions more focused so they admit a specific answer. Three questions means three opportunities for upvotes from the same user, so I don't know what you're complaining about. We are trying to help, there is no need to bite back. Oct 1 comment Best Practice for using Notation,$Pre, MakeExpression in a package @NoEscape - please keep it civil. The point we are trying to make is that StackExchange sites have a specific purpose - Q&A. They aren't designed for open-ended discussion. To that end, we prefer questions to be crafted in a way that admits a specific answer. You might find this guide useful, along with this blog post by Jon Skeet. As I said before, these are interesting questions, but it would be better to split them into three separate posts, and provide a little more detail for each. Oct 1 comment Best Practice for using Notation, \$Pre, MakeExpression in a package This is a really interesting set of questions. However, because this is a Q&A site, not a discussion site, it would be better to (a) break this up into three questions as numbered and (b) be a bit more specific about your actual problem (e.g., what are the non-standard notations and input conventions you actually want to use). I would also recommend you format function names as code for easy reading. Here's how to do it. Oct 1 comment How to combine ArrayPlots? @kjo, see if my latest edit does what you need. As noted at the top of my post, Grid plus some tweaking of built-in options can do exactly what is shown in the Wikipedia example. Oct 1 comment How to combine ArrayPlots? The answers to this question might be of assistance. I think part of the issue is that you are using GraphicsRow instead of Row. Oct 1 comment Implementation of a new Game of Life Rule Welcome to Mathematica.SE! Could you please edit your question to explain what you have tried, and how the spreadsheet outcomes linked in your question relate to the problem. Sep 29 comment How to make “molbio-style heat maps” in Mathematica Isn't this question, in essence, the same as your earlier closed one, with the added issue of getting the right ColorFunction? Have a look at the documentation for Blend. Sep 29 comment Are there suitable versioning systems for Mathematica notebooks? @FredDanielKline there is already a proposal for the community to migrate that question on SO. If that is supported, then we can merge your question with that one once it's migrated. Sep 29 comment How to compile Map and MapAt Welcome to Mathematica.SE, arkajad! I formatted your code for you, to make it easier for people to read. This page is helpful if you would like to know how to do this yourself. Sep 27 comment Nested If statements In similar circumstances you might want to investigate Switch and Which, which are both easier to manage than nested If statements. Sep 26 comment Change values in equation with slider Hope you don’t mind the edit. I realise my draft wasn't different enough Sep 24 comment How to get data from For loops to plot it? Glad to help, but "Why don't the integrals converge?" is a completely different question.