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MathGroup Archive 2004

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Re: Re: Newly Released Mathematica 5.1 Delivers Unmatched Performance for Handling Data

  • To: mathgroup at smc.vnet.net
  • Subject: [mg52306] Re: [mg52274] Re: Newly Released Mathematica 5.1 Delivers Unmatched Performance for Handling Data
  • From: "David Park" <djmp at earthlink.net>
  • Date: Sun, 21 Nov 2004 07:23:53 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Here is one thing that I hazard is a new bug. I don't actually have 5.1 so
maybe someone can check it for me.

The following works fine in 5.0.1.

Needs["Graphics`Colors`"]

f[x_, y_] :=
  With[{v = Sin[x y]},
    Which[v < 0, Gray,
      v < 0.2, LightCoral,
      v < 0.4, PaleGreen,
      v < 0.6, CadetBlue,
      v < 0.8, GeraniumLake,
      True, UltramarineViolet
      ]]

Show[Graphics[
      {RasterArray[
          Table[f[x, y], {x, 0, 5, 5/101}, {y, 0, 5, 5/101}], {{0, 0}, {5,
              5}}]}],
    AspectRatio -> Automatic,
    Frame -> True,
    ImageSize -> 400];

If it doesn't work in 5.1, I'm sure there's a good reason.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/



From: Time E. Time [mailto:timetime at gmail.com]
To: mathgroup at smc.vnet.net

New features and better algorithms are great, but does anyone know if
they've fixed any bugs in this release?  Things like

The rotated text bug on Macs where labels on the y-axis of frames are
garbled.

The instability in large eigenvalue calculations, which sometimes make
it impossible to interrupt the kernel and other times cause the kernel
to unexpectedly quit.

The "feature" where Mathematica uses a non-standard character
encoding, so that text in graphics is garbled when imported into some
other programs, like Illustrator.

I'm excited about cluster analysis, but I can't bring myself to fork
over any more money to Stephen Wolfram until simple problems which
have existed for years are fixed.

-Tim




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