User Portlet

Szabolcs Horvát
Discussions
*[Cross-posted to Mathematica.SE](https://mathematica.stackexchange.com/q/218347/12)* I have a Raspberry Pi 1B with Raspbian Buster and Wolfram Engine 12.0.1. If I try to use J/Link, I get the following error message: ~ \$ wolfram ...
Mathematica 12.0 brought major positive changes to the handling of vertex and edge properties in Graphs. Before, almost all Graph processing functions discarded all properties (such as edge weights). If we took a Subgraph of a Graph, no...
I have a text cell. I selected part of the text in the cell and made it into a hyperlink using Edit -> Hyperlink. How can I edit the link after the fact? I want to change the URL it points to. I realized that I habitually edit the cell...
I would like to share some thoughts about a specific limitation of the Wolfram Language and ask for ideas about how problems of the sort I'll describe below could be handled better. Mathematica has many functions for discrete mathematics. A common...
There are several pieces of functionality related to Graph which are unsatisfactorily documented, to the point that they are simply unusable for real work. Even after repeated requests to support, the responsible developers simply refused to...
It's been out for quite a while now, but for those who don't know about it, I would like to announce the [BoolEval package](http://szhorvat.net/mathematica/BoolEval). *Note:* You can try a preview of the main function [from the Wolfram Function...
Raspberry Pi users: do any of you use [IGraph/M](http://szhorvat.net/mathematica/IGraphM), a graph theory package? I am trying to decide whether it's worth continuing to produce binaries for this platform. If you use it or tried it, please...
_This post showcases a few features of the IGraph/M graph theory and network analysis package. All examples are included in the attached notebook._ ## Installation If you do not yet have [IGraph/M](https://github.com/szhorvat/IGraphM) installed...
Pre-process the image to obtain a reasonable skeleton. For example, img = Import["https://github.com/DeepaMahm/cytoscape/raw/master/Bagah.jpeg"] ![enter image description here][1] Notice that there is a white boundary. Crop it off,...
EDIT 2: As noted below, the problem is now resolved. ---- EDIT and warning: If you have Mathematica on the Raspberry Pi right now, do not uninstall at this point. ---- Mathematica is no longer included in the Raspbian repositories or the...