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Dec
20
comment Elegantly split a matrix into positive and negative parts?
Or in one line: {pos, neg} = m * UnitStep /@ {m, -m}
May
21
comment Speeding up a numerical constrained quadratic optimization
@OleksandrR.: I tried NMaximize with Method->{"RandomSearch",Method->"QuasiNewton","PostProcess"->"KKT"} on a similar smaller problem (7 vars), but it fails after a long time with NMaximize::cvmit: "Failed to converge to the requested accuracy or precision within \[NoBreak]100\[NoBreak] iterations. ".
May
21
comment Speeding up a numerical constrained quadratic optimization
@OleksandrR.: What do you mean by using FindMinimum via the "RandomSearch" method of NMinimize?
May
21
comment Speeding up a numerical constrained quadratic optimization
@OleksandrR.: I thought FindMinimum only gives a local minimum.
May
21
comment How to “Copy as Unicode” from a Notebook?
There's a built-in CopyToClipboard function, but it doesn't seem to work, at least on Linux.
May
20
comment How can I convert a plot to pdf or eps without errors?
@Jens: How did you get fonts to work in PDF export?
Feb
15
comment Piping and Replacement
The choice of relative precedence of // and /. is poor, I feel.
Feb
7
comment Examples of (well coded) packages using custom notation
@magma: By "source" I mean the "preferred form in which a programmer would modify the program.".
Dec
21
comment Better Autocompelete for the Front-End
Related: mathematica.stackexchange.com/questions/16599/…
Dec
8
comment Examples of (well coded) packages using custom notation
@magma: Which one is the source file then?
Dec
8
comment Superscript prime symbol
@OleksandrR.: The Derivative confusion only occurs with an apostrophe, not \[Prime]. The asker wanted to be able to use unprimed and primed in the same expression.
Dec
7
comment Combining two lists of different dimensions into a list of all combinations of points?
This is the Cartesian or outer product.
Dec
7
comment Can Mathematica show me a fraction with a repeating decimal notation?
+1 for making the formatted output usable as input.
Dec
6
comment Superscript prime symbol
That causes q to display as q^\[Prime]. But you could instead use InterpretationBox[SuperscriptBox[name, "\[Prime]"], Symbol[name <> "\[Prime]"]].
Dec
6
comment What are \[InvisiblePrefixScriptBase] and \[InvisiblePostfixScriptBase]?
@kguler: So it seems like the Prefix one is meant as an invisible base character for sub-/superscripts that are typeset before the conceptual base character. But the Postfix one is still a mystery.
Dec
3
comment Implementing efficient multiple undo
@Jérémie: Kernel sessions are computationally intensive. Undo would be a feature of the front-end. While graphics can use a fair amount of memory, that problem is surmountable (works fine in GIMP).
Dec
2
comment How to make an inkblot?
@Szabolcs Or viruses.
Dec
1
comment Mathematica as a normal programming language
Related: meta.mathematica.stackexchange.com/questions/270/…, mathematica.stackexchange.com/questions/4454/…
Dec
1
comment Why does Mathematica choose branches as it does in this situation?
Possibly related: mathematica.stackexchange.com/questions/13949/…
Nov
30
comment Pattern that matches colors
test[GrayLevel[0.5]] "bad". Obviously you can just test the heads against all you think of, but that's not robust if you forget one or if Wolfram adds another.