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Re: IntegerPart

  • To: mathgroup at smc.vnet.net
  • Subject: [mg130314] Re: IntegerPart
  • From: Peter Pein <petsie at dordos.net>
  • Date: Tue, 2 Apr 2013 03:28:48 -0400 (EDT)
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  • References: <kjb430$8jc$1@smc.vnet.net>

Am 01.04.2013 06:57, schrieb dougwangsaif at gmail.com:
> 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}]
>

Hi,

  the Plot-algorithm simply selects too few supporting points. Adding 
the rule PlotPoints -> nSize + 3 to the call to Plot[] will show the 
complete graph.

Peter



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