In Mathematica, most of what you do is based on expressions. Expressions naturally have the tree structure. For depth-first traversals (which are probably most common), you can then use functions like Scan,Map, Cases etc. The difference w.r.t the more traditional languages is that there is no simple way to preserve the identity of individual node …
I use Mathematica to take lecture notes in real time without any major issues (while the proud TeX guys struggle hard to keep up 🙂 ). I have also used it for most math-related homework/assignments I wrote during past two and half years on university. Before you start, you may want to look at some …
Mathematica evaluates expression once, then returns the expression unevaluated [closed]
Whilst this may not be a better way, an alternative approach to circumvent the need of J/Link would be to set up an intermediate CGI script to translate the request from GET to POST for you. This script file would sit on an accessible server, it would take the specified GET query, make a POST …
A more practical difference between Block and Module can be seen here: Module[{x}, x] Block[{x}, x] (* -> x$1979 x *) So if you wish to return eg x, you can use Block. For instance, Plot[D[Sin[x], x], {x, 0, 10}] does not work; to make it work, one could use Plot[Block[{x}, D[Sin[x], x]], {x, 0, …
A little bird just informed me of a Mathematica solution to this question (the underlying implementation still uses JLink, but this answer hides all the java related code): imgur[expr_] := Module[ {url, key, image, data, xml, imgurUrl}, url = “http://api.imgur.com/2/upload”; key = “c07bc3fb59ef878d5e23a0c4972fbb29”; image = Fold[ExportString, expr, {“PNG”, “Base64”}]; xml = Import[url, “XML”, “RequestMethod” -> …
Preface Since the Mathematica support for google-code-prettify was mainly developed for the new Mathematica.Stackexchange site, please see also the discussion here. Introduction I have no deep knowledge of all of this, but there were times when I wrote a cweb plugin for Idea to have my code highlighted there. In an IDE all this is …
To show how to create documentation that incorporates to the Documentation Center we will create a package that contains very simple functions and its documentation. Lets call our package SOPackage. This package will be stored in a folder of the same name and such folder should be stored in either $BaseDirectory or $UserBaseDirectory$. The SOPakage …
It’s recommended to disable the file outline cache, which is the metadata you’re referring to when you look at the notebook with a text editor. As you discovered, it can cause merge conflicts if multiple parties are editing the same notebook. This is easily disabled with the Option Inspector. In the Mathematica menu, go to …
This function implements the reverse blend described by Mark Ransom, for an additional small but visible improvement: reverseBlend[img_Image, alpha_Image, bgcolor_] := With[ {c = ImageData[img], a = ImageData[alpha] + 0.0001, (* this is to minimize ComplexInfinitys and considerably improve performance *) bc = bgcolor}, ImageClip@ Image[Quiet[(c – bc (1 – a))/a, {Power::infy, Infinity::indet}] /. {ComplexInfinity …