Talk:QR decomposition: Difference between revisions
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:::: <math>\beta</math> is a scalar value (since <math>v^T v</math> is a doct product), not a matrix, so making it a array will cause a type error. --[[User:Avi|Avi]] 16:07, 14 July 2011 (UTC)
::::: What you have reverted breaks the code to me. Maybe I am using a different Common Lisp compiler? http://ideone.com/UUsVG
:::::: I have to agree with you once again. In my development version, I used a slightly different matrix multiplication routine (mmul), that turns a 1x1 array, like in the case of <math>v^Tv</math>, to a scalar. The [[Matrix multiplication#Common Lisp|mmul on RC]] does not do that, so your fix was correct, and I will revert my change. Thanks for your effort. --[[User:Avi|Avi]] 09:35, 16 July 2011 (UTC)
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