# István Zachar

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bio website location Budapest, Hungary age 33 member for 2 years, 3 months seen 12 hours ago profile views 1,161

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

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 Mar23 comment Problem with displayed coordinates in LogLinearPlot Ahh, I see, you are on v8. Then I guess you have to construct your own legend from scratch. Mar23 comment Problem with displayed coordinates in LogLinearPlot My idea is that the PlotLegends package messes up the coordinates. Removing the legend-related options fixes it. Can you use the version 9 built in PlotLegends option instead of the (now obsolete) package? Mar23 revised Problem with displayed coordinates in LogLinearPlot deleted 43 characters in body Mar23 revised How to apply a function to a list of tuples deleted 56 characters in body Mar23 comment Fastest way to calculate matrix of pairwise distances I just want to point out that most of the answers (using the vectorized speedup) won't work for the more general case (e.g. Hamming distance of vectors, edit distance of strings, etc.). If one does not want to desing a specific, highly optimized method for each such case, I found that using Outer is generally the fastest way. Mar23 comment Steady states and eigenvalues for a non-linear system: @acl The Transpose::nmtx error is because Solve returns {} which cannot be transposed. Mar23 comment Fastest way to calculate matrix of pairwise distances Good question, just what I was looking for at the moment! I also wonder, how much speed can be gained if only the distance functions is reimplemented & compiled? Mar22 comment Steady states and eigenvalues for a non-linear system: @acl What's wrong with this code being not minimal (apart of possible errors)? Mar22 comment Steady states and eigenvalues for a non-linear system: Are you sure your 4th equation is ok? Shouldn't it be the derivative, Y'[t] == ... instead of Y'[t] = ...? At the moment it is recursive. Stell there is no solution for steady state (Solve returns {}). Mar22 comment Steady states and eigenvalues for a non-linear system: Note that I is the built-in symbol for the imaginary number, which evaluates to a complex number: MatchQ[I + 1, _Real] returns False. Furthermore, as you already know it, E and even K have built-in meanings which might mess up your calculation. Mar22 revised Convex hull of a 3D object? added 84 characters in body; edited tags; edited title Mar22 comment How to make 3D object smooth? Could you post some simple example to play with? Mar22 comment Standard message definition construct I didn't know about that, +1! I only used the ValueQ method to inject new info to existing messages, for example when using built-in symbols for option names in own package. Mar22 revised Standard message definition construct typos Mar22 revised How to pass a list of arguments into HoldAll added 82 characters in body Mar22 comment How to pass a list of arguments into HoldAll @Mr.Wizard Thanks, I'm not sure this is what Emerson wants to do, but it nicely fits in the picture. Mar22 revised How to pass a list of arguments into HoldAll edited tags Mar22 revised How to pass a list of arguments into HoldAll added 373 characters in body Mar22 comment How to pass a list of arguments into HoldAll @Mr.Wizard Ooh, ok, I think a bit more on this... :) Mar22 comment How to pass a list of arguments into HoldAll @Mr.Wizard Sure, but wasn't it the point of OP to set up a, b, c as fixed symbolic arguments? Practically, in this case it would be simpler to only maintain the number of arguments instead of their names.