Mathematica Weekly Newsletter
Mathematica Weekly Newsletter

Top new questions this week:

Dataset seems to break Information

Bug present in version 10.2 My little function, from pre-10.2 ,to turn a headed table into a Dataset. toDataset[table_List] := Dataset@(Association /@ (Function[r, Thread[First[r] -> #] ...

bugs formatting dataset  
asked by Ymareth 17 votes
answered by WReach 14 votes

A With expression local variable specification without head List

I just noticed a new form of With in its documentation: With[$x=x_0$, $expr$] specifies that all occurrences of the symbol $x$ in $expr$ should be replaced by $x_0$. Note the lack of braces ...

bugs scoping documentation  
asked by jkuczm 17 votes
answered by Itai Seggev 9 votes

New AssociationThread forms in 10.2?

Is this another case of "documented" but "not implemented" ? or at least it is not explained clearly as I cannot make it work: Two new forms appears in the new 10.2 doc. of AssociationThread (the ...

bugs syntax documentation  
asked by SquareOne 17 votes

Visualizing Type System Operations

With the introduction of Dataset in version 10, Mathematica acquired a static type-checking subsystem. A fair number of dataset-related questions here on MSE concern the operation of that type ...

visualization dataset query  
asked by WReach 16 votes
answered by WReach 16 votes

Speeding up the built-in Rudin-Shapiro and Thue-Morse sequence functions

Version 10.2 introduced two well-studied sequences as functions: the (Golay-)Rudin-Shapiro sequence (RudinShapiro[]) and the (Prouhet-)Thue-Morse sequence (ThueMorse[]). Since these functions are ...

performance-tuning number-theory integer-sequence  
asked by Guess who it is. 15 votes
answered by Oleksandr R. 14 votes

Initial values in Manipulate are hijacked by existing global variable values

Is the following behaviour a bug? It's the same in all versions between 9.0-10.2.0. Let's try this simple Manipulate with the initial value of a set to 1: Manipulate[Style[a, Large], {{a, 1}, 0, ...

asked by Szabolcs 13 votes

How can we show the boundary of a WordCloud shape?

WordCloud can arrange the words inside a shape. data = EntityValue[CountryData[], {"Name", "Population"}]; WordCloud[data, Disk[], WordOrientation -> "Random", Frame -> True] As you can see ...

graphics generative-art word-cloud  
asked by Szabolcs 12 votes
answered by Sjoerd C. de Vries 12 votes

Greatest hits from previous weeks:

Mathematica Minecraft

Some time ago I asked myself: with all these great graphics and interactive capabilities of Mathematica, what kinds of 3D games can be implemented in it? And the answer which came to mind is ...

programming dynamic graphics3d eventhandler development  
asked by faleichik 128 votes
answered by faleichik 171 votes

Where can I find examples of good Mathematica programming practice?

I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't ...

reference-request programming  
asked by Guess who it is. 360 votes
answered by faysou 328 votes

Can you answer these?

Parallel evaluation of symbolic matrix eigenvalues

I'm trying to find eigenvalues of symbolic hermitian 40x40 block matrix. It is made from 20 2x2 matrices like this: ArrayFlatten[Table[M[m,n],{m,1,20},{n,1,20}]] My computer can't solve this ...

matrix symbolic linear-algebra parallel  
asked by Alik 2 votes

Call library function in compile

On the Wolfram official website, there is an example of calling library function in a compiled function: Needs["CompiledFunctionTools`"] ...

asked by xslittlegrass 2 votes

Front End does not respond to keys (version 10.2, Linux)

I was often complaining about the front end performance under Linux, but it seems I could pin down a very critical issue. I made a screen-cast that shows how to reproduce the issue Screen-cast on ...

front-end keyboard linux version-10.2  
asked by halirutan 2 votes
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