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comment Elegantly split a matrix into positive and negative parts?
Or in one line: {pos, neg} = m * UnitStep /@ {m, -m}
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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
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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.
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answered How to “Copy as Unicode” from a Notebook?
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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.
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revised Dynamic graph visualisation using JLink/Java and GraphStream
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answered Light syntax parser for Mathematica?
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suggested approved edit on Dynamic graph visualisation using JLink/Java and GraphStream
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21
revised Speeding up a numerical constrained quadratic optimization
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