# István Zachar

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bio website location Budapest, Hungary age 33 member for 2 years, 3 months seen 5 hours ago profile views 1,161

Mathematica 9.0.1.0, Windows 7, 64-bit, 2 CPUs

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 Mar27 comment How to make a defined symbol stay in symbol form? You might want to restrain yourself giving ownvalues to such symbols. Use them rather in local replacements like: Clear[w, g]; (w + g)/. {w->1, g->2}. So if you want the unevaluated symbol form, you can always write {w, g}[[2]] to get g. Mar27 comment Sorting a matrix alphanumerically @Mr.W yes, I was thinking about this though some confirmation from Hauke would be useful before delving deep. Surely then we need a metric on how well a matrix is ordered. Mar27 comment Click on a curve to start Manipulating another function My examples are fairly general, I only left the final Epilog part to be converted to a Table or Map, as an exercise. Thanks for the accept, though mind that it is generally more rewarding to wait a few days before accepting an answer so that other, even better solutions could appear! Mar27 comment Sorting a matrix alphanumerically Sounds interesting, but I fail to get how the expected result is lexicographically ordered: h > g (rows are not ordered according to lex) and h > b (columns are not ordered...). Mar27 revised Click on a curve to start Manipulating another function added 1249 characters in body Mar27 revised Click on a curve to start Manipulating another function added 795 characters in body Mar27 answered Click on a curve to start Manipulating another function Mar26 comment Solving a system of differential equations Did you try it with a fresh kernel? It gives solutions for x, y and z in version 9.0.1. It seems like a function definition (or alike, e.g. x'[t] = 3 x[t] + 2 y[t] + 4 z[t]) remains in memory after ClearAll, that renders one or more of the equations to immediately simplified to True. Mar26 accepted Alternative updating of a dynamic expression Mar26 comment Alternative updating of a dynamic expression This must be the saddest Q&A and accept with so low scores... :/ I find this functionality so useful, and I hardly can believe that there is no alternative (or even builtin) method to achieve this. Anyway, you got my accept! Mar26 accepted Patternmatching sets Mar26 reviewed Close How to rotate Graphics3D into CDF? Mar26 comment What is the equivalent of TogglerBar that will work with Manipulate? It only works as a SetterBar without the quotes because for a certain number of options the default is SetterBar. Try it with Manipulate[option, {option, {1, 2, 3, 4, 5, 6}}] to see that the default for n > 5 options is PopupMenu. Manipulate is a smart guy (or at least it wants to look like one). Mar26 comment What is the equivalent of TogglerBar that will work with Manipulate? ControlType requires symbols and not strings: ControlType -> TogglerBar should work. Also, your example is missing a bracket } in customFunction. Mar26 revised How to build and operate a master Notebook? deleted 32 characters in body Mar25 revised How to make Mathematica returns the exact expression I typed edited tags Mar25 comment Fastest way to calculate matrix of pairwise distances @J.M or tri = {(* lower triangle *)}; full = tri + Transpose@tri*(1-IdentityMatrix@n). Or if the diagonal is assumed to be zero (in case of most distance functions), the 1-IdentityMatrix@n part can be omitted. Mar24 reviewed Approve suggested edit on What is the complete list of valid Front End Tokens? Mar23 answered Problem with displayed coordinates in LogLinearPlot Mar23 revised Problem with displayed coordinates in LogLinearPlot deleted 269 characters in body; edited title