LFD Book Forum HW5, Prob 7
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#1
08-09-2012, 04:56 PM
 DeanS Member Join Date: Jul 2012 Posts: 16
HW5, Prob 7

A question on the definition of "coordinate descent." When we start with the u direction, do we go down the u coordinate only once per iteration or do we go down as many time as we can so long as the error is less at each subiteration. In other words, is step 1 only one substep or a "while" loop that only terminates when the error ceases to be less at which time we then jump to step 2 on the v direction.

I would appreciate clarification. Thanks.
#2
08-09-2012, 06:30 PM
 yaser Caltech Join Date: Aug 2009 Location: Pasadena, California, USA Posts: 1,478
Re: HW5, Prob 7

Quote:
 Originally Posted by DeanS A question on the definition of "coordinate descent." When we start with the u direction, do we go down the u coordinate only once per iteration or do we go down as many time as we can so long as the error is less at each subiteration. In other words, is step 1 only one substep or a "while" loop that only terminates when the error ceases to be less at which time we then jump to step 2 on the v direction. I would appreciate clarification. Thanks.
You go only once per iteration.
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#3
08-10-2012, 06:01 AM
 DeanS Member Join Date: Jul 2012 Posts: 16
Re: HW5, Prob 7

Thank you. This is a great course!

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