problem 2.2 in homework 2

[Ruikun Luo]

Still confused about what the x vector looks like in problem 2.2. Does it mean that 1st to i-1 th  elements are (-1)^i, and the i th element is (-1)^(i+1)?

[Mu Li]

Hi Ruikun,

Yes, you are right. Then you can guess what the optimal solution looks like. 

Best,

Mu

On Sat, Feb 16, 2013 at 1:04 AM, Ruikun Luo <luorui...@gmail.com> wrote:

Still confused about what the x vector looks like in problem 2.2. Does it mean that 1st to i-1 th  elements are (-1)^i, and the i th element is (-1)^(i+1)?

--
http://alex.smola.org/teaching/cmu2013-10-701 (course website)
http://www.youtube.com/playlist?list=PLZSO_6-bSqHQmMKwWVvYwKreGu4b4kMU9 (YouTube playlist)
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[Sam Zhang]

When i = 1, is the first term of xi (-1)^i or (-1)(i+1)

Thanks,

Sam

On Saturday, February 16, 2013 1:32:16 AM UTC-5, Mu LI wrote:

Hi Ruikun,

Yes, you are right. Then you can guess what the optimal solution looks like. 

Best,

Mu

On Sat, Feb 16, 2013 at 1:04 AM, Ruikun Luo <luorui...@gmail.com> wrote:

Still confused about what the x vector looks like in problem 2.2. Does it mean that 1st to i-1 th  elements are (-1)^i, and the i th element is (-1)^(i+1)?

--
http://alex.smola.org/teaching/cmu2013-10-701 (course website)
http://www.youtube.com/playlist?list=PLZSO_6-bSqHQmMKwWVvYwKreGu4b4kMU9 (YouTube playlist)
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[Shuchang Liu]

Hi,

From my point of view, the values should look like,

i             y                    x

1            1           (1, 0, 0, 0, 0, ...)

2           -1           (1, -1, 0, 0, 0, ...)

3            1           (-1, -1, 1, 0, 0, ...)

4           -1           (1, 1, 1, -1, 0, ...)

Thanks!