[ITK Community] [Insight-users] dot product of itk vector was completely wrong

Bradley Lowekamp blowekamp at mail.nih.gov
Tue Feb 11 19:54:20 EST 2014


David,

Thanks for updating the Wiki Examples.

Brad

On Feb 11, 2014, at 3:45 PM, David Doria <daviddoria at gmail.com> wrote:

> On Tue, Feb 11, 2014 at 3:04 PM, Bradley Lowekamp
> <blowekamp at mail.nih.gov> wrote:
>> http://www.itk.org/Doxygen/html/classitk_1_1Vector.html
>> 
>> The return type for the operator* for a dot product is Vector::ValueType, a
>> scalar, not a vector.
>> http://www.itk.org/Doxygen/html/classitk_1_1Vector.html#a51bad5a3835ffc0fbbc02d5437f7e691
>> 
>> By assigning to to a new Vector are implicitly calling this constructor:
>> http://www.itk.org/Doxygen/html/classitk_1_1Vector.html#a106ee9550311054cceb66015e98c6457
>> 
>> The example is wrong. Watch your types.
>> 
>> Brad
> 
> Brad is right - the 'dotproduct' variable in the example should be a
> VectorType::ComponentType, not just VectorType. I updated the page
> with the fix.
> 
> David
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