[Insight-users] MeanCalculator

[Karthik Krishnan]

Hi Corinna,

I've added a safeguard to the itkMeanCalculator.txx, so it throws an 
exception if the length of the output is 0. Please update  
Code/Numerics/Statistics/itkMeanCalculator.txx and please let me know if 
it throws an exception.

If it doesn't, sample code would be appreciated.

Thanks
-karthik

Buerger, Corinna (ext) wrote:

> Hi all,
>  
> I want to use the itk::Statistics::MeanCalculator.
> The following lines are a code snippet of mine.
>  
> // start code snippet
> MeanCalculatorType::Pointer meanCalculator = MeanCalculatorType::New();
> meanCalculator->SetInputSample( dataSample );
> meanCalculator->Update();
> std::cout << "size of data sample: " << dataSample->Size() << 
> std::endl;                                     // outputs 3 (which is 
> correct)
> std::cout << "size of mean: " << 
> meanCalculator->GetOutput()->GetSize() << std::endl;                // 
> outputs 0 (why???)
> // end code snippet
>  
> dataSample is earlier defined as:
> typedef itk::VariableLengthVector< double > DataType;
> typedef itk::Statistics::ListSample< DataType > DataSampleType;
> DataSampleType::Pointer dataSample;
>  
> Why do I get no output from the MeanCalculator?
> Any help is appreciated.
>  
> Regards,
>  
> Corinna
>
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