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Re: IntegerPart

  • To: mathgroup at smc.vnet.net
  • Subject: [mg130315] Re: IntegerPart
  • From: Sseziwa Mukasa <mukasa at gmail.com>
  • Date: Tue, 2 Apr 2013 03:29:09 -0400 (EDT)
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  • References: <20130401045851.848996A96@smc.vnet.net>

Nothing's wrong with IntegerPart, Plot doesn't necessarily sample the 
point you expect by default.  You can increase the number of points and 
subdivisions to get what I assume is your expected Plot:

Plot[{prefstate[[IntegerPart[x]]]}, {x, 1, nSize}, PlotPoints -> 67,
 MaxRecursion -> 6, AxesOrigin -> {0, 0}, TicksStyle -> Directive[18],

 PlotStyle -> {Black}]

On Apr 1, 2013, at 12:58 AM, dougwangsaif at gmail.com wrote:

> can anyone help with this. There seems to be something wrong with the 
IntegerPart function. Please help!
>
> Clear["Global`*"]
> nSize = 100;
>
> prefstate = Table[0, {i, 1, nSize}];
> Do[
>  {prefstate[[i]] = If[EvenQ[i], 0.8, 0.4]},
>  {i, 1, nSize}
>  ];
>
> Plot[{prefstate[[IntegerPart[x]]]}, {x, 1, nSize + 1},
> AxesOrigin -> {0, 0}, TicksStyle -> Directive[18],
> PlotStyle -> {Black}]
>




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