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Re: Programming Fail

• To: mathgroup at smc.vnet.net
• Subject: [mg132031] Re: Programming Fail
• From: Bob Hanlon <hanlonr357 at gmail.com>
• Date: Tue, 19 Nov 2013 02:58:35 -0500 (EST)
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• References: <20131117232215.A9F846A15@smc.vnet.net>

Before using pitchMap you need integers rather than strings.


A = NestList[
      StringReplace[#,
        {"0" -> "2", "2" -> "12", "1" -> "23",
         "3" -> "45", "4" -> "56"}] &,
      "0", 7] // ToExpression //
    IntegerDigits // Flatten;


pitchMap = {0 -> "B4", 1 -> "C4", 2 -> "D4",
   3 -> "E4", 4 -> "F4", 5 -> "G4", 6 -> "A4"};


Sound[Thread[SoundNote[A] /. pitchMap]]


or


Sound[SoundNote /@ A /. pitchMap]



Bob Hanlon




On Sun, Nov 17, 2013 at 6:22 PM, Dean Rosenthal <deanrosenthal at gmail.com>wrote:

> Hi:
>
> My question is going to take all of you about a split second to answer.
>  Sadly, programming is something I seem to be congenitally incapable of
> teaching myself and doing well.  I usually just cut and paste specifics
> into prewritten algorithms.
>
> If you do this
>
> pitchMap = {1 -> {"C4", "D4"}, 2 -> "D4", 3 -> "E4", 4 -> "F4", 5 -> "G4"};
>
> Sound[Thread[SoundNote[Flatten[IntegerPartitions[5]] /. pitchMap]]]
>
>
> You get a music player and can play the result.
>
>
> If you do this:
>
>
> A = NestList[
>   StringReplace[#, {"0" -> "2", "2" -> "12", "1" -> "23", "3" -> "45",
>      "4" -> "56"}] &, "0", 7]
>
> pitchMap = {0 -> "B4", 1 -> "C4", 2 -> "D4", 3 -> "E4", 4 -> "F4", 5 ->
> "G4",
>    6 -> "A4"};
>
> Sound[Thread[SoundNote[Flatten[A]] /. pitchMap]]]
>
>
> You get nothing, just output.  See what I did there?  I substituted,
> because that's what you do if you don't know how to program!  On the face
> of things, I can't see why it wouldn't work, but I've wasted at least an
> hour going through documentation and Googling and trying different
> approaches.  I'm not a programmer and I can't seem to teach myself how to
> do this, ideas?
>
>
> Thanks,
>
>
> Dean
>
>
>

• References:
  • Programming Fail
    • From: Dean Rosenthal <deanrosenthal@gmail.com>