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MathGroup Archive 2005

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Re: How can I get a nonscalar logical variable into a compiled function?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56196] Re: How can I get a nonscalar logical variable into a compiled function?
  • From: dh <dh at metrohm.ch>
  • Date: Tue, 19 Apr 2005 04:54:52 -0400 (EDT)
  • References: <d3t3o2$8og$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Ben,
as arrays of boolean may not be fed to a compile function, you could 
simply represent True/False by 0/1 for the Input/Output of your 
function. Inside the functio, you may either choose to convert to 
True/False or you can proceed with 0/1, whatever suits you better.
Sincerely, Daniel

barrowes at alum.mit.edu wrote:
> I can't seem to figure out how to get a nonscalar logical variable into
> a compiled function.
> 
> I can get a nonscalar variable of other kinds into compiled function or
> a scalar True or False into a compiled function.
> 
> For example the following two things work:
> 
> fun1=Compile[{{x,_Real,2}}
> Print[x];
> ];
> 
> fun2=Compile[{{x,True|False}}
> Print[x];
> ];
> 
> but how can I specify a two-dimensional input variable into the second
> case?
> fun2=Compile[{{x,True|False,1}}
> Print[x];
> ];
> doesn't work. It returns:
> gg = {False, True, True, True, True, True, True}
> fun2[gg]
> CompiledFunction::cfsa: Argument {False, True, True, True, True, True,
> True} \
> at position 1 should be a True or False.
> 
> Can only scalar logical variables be input into compiled functions? Am
> I missing something?
> 
> Thanks,
> Ben
> 


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