Jourdan Foote (born April 15, 1992 in Queens, NY), better known by his stag… Read Full Bio ↴Jourdan Foote (born April 15, 1992 in Queens, NY), better known by his stage name J. Sparse (sometimes stylized as J.Sparse and also known as Jourdan Sparse, and Sparse), is an American rapper, songwriter, actor, model, and entrepreneur. At age 11 he moved to Las Vegas with his mom and two brothers where he began to model and act. After modeling for clothing lines such as Akademiks and Phat Farm and attending numerous auditions, J. Sparse turned down his invite to The International Modeling and Talent Association (IMTA) and began taking his interest in writing to the next level. He began to write short stories and songs and upon reaching his senior year in high school he formed the music duo "New Test" with $pad3s and made over 8 songs including the release of the Nothing Less - EP, but due to disagreements and different career goals he disbanded from his partner. He began his solo career with the release of his first mixtape entitled "Hats Off" and by forming musical collective "CleanSweep." He is currently the head of the music duo "C$B" consisting of $pad3s and himself. His second solo mixtape is scheduled to be released sometime in 2012 as well as his second mixtape with C$B.

What If
J.Sparse Lyrics

수십 번 내게 질문을 해
Am I really like that?
희망, 긍정, 늘 웃는 얼굴의 상태
그저 할 수 있는 부분이라고 생각했어
So my music, my speech, my feel
I made it myself

But 의문이 들어, 제이홉에게 물어
'너라면 니가 말한 부분들을 지킬 수 있어?'
어쩌면 내 자의가 아닌 무수한 환경으로 탄생한 나

Hey 당당히 비춰 너의 persona
Hold up

(Can I do this?)
Let me think
(Can I do it?)
Even in this case

(What?)
What if, what if, what if, what if
What if I have no hope? (What?)
What if, what if, what if, what if
What if I have no dream? (What?)
What if, what if, what if, what if
What if I have no passion? (What?)
What if, what if, what if, what if
What if I have no vision? (Wait)

Hey, how you doin', bro?
요즘은 살 만한가 봐, 멋 부리고
너에게 풍파와 시련이란 건 뭘까?
온전한 계단으로만 올라왔기에
그건 모를 수도 있는 거야

정작 넌 지금 다 가졌지
돈 명예 부, 니가 좋은 사람들의 following까지
나 자신을 사랑하고 희망을 가지라는 거
저 모든 게 박탈이 되고, 밑바닥이어도
말할 수 있을까 넌? (I wish)
Hold up

(Can I do this?)
Let me think
(Can I do it?)
Even in this case

(What?)
What if, what if, what if, what if
What if I have no hope? (What?)
What if, what if, what if, what if
What if I have no dream? (What?)
What if, what if, what if, what if
What if I have no passion? (What?)
What if, what if, what if, what if
What if I have no vision? (Wait)

And what if, what if, what if, what if
What if I have no money? (Money)
What if, what if, what if, what if
What if I have no house? (House)
What if, what if, what if, what if
What if I have no car? (Car)
What if, what if, what if, what if
What if I have nothing

Can I do that shit?

Lyrics © Sony/ATV Music Publishing LLC, Kobalt Music Publishing Ltd., Warner Chappell Music, Inc.

Written by: Dwayne Allen Abernathy, Ho Seok Jung, Robert F. Diggs, Russell T. Jones

Lyrics Licensed & Provided by LyricFind

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Comments from YouTube:

Xing Yan

3y↑1

thank you， nice explaination. One question is , how can I modify code so that formatting csc?

Machine Learning & Simulation

Thanks a lot for your feedback. :)

Regarding your question: You would have to change the creation of the CSC-Matrix and change the looping a bit, but they follow a mostly similar strategy.

I have also planned to cover this in a future video, but it will probably take me a longer time until I can produce it. Until then, you could take a look at how SciPy does it: https://github.com/scipy/scipy/blob/v1.7.1/scipy/sparse/csc.py#L16-L232 However, this could be a bit overkill since it contains additional points in their class-based interface.

alexandros iossif

3y↑1

i didn't quite understand why we use the IP(i+1).
in some algorithms, there is IP(i+1) -1. Can you give an example, please?

Machine Learning & Simulation

Hey, you probably refer to the algorithm for the matrix-vector product at roughly 12:35, right?

I think that the difference is due to how you define range-based looping in different languages. IP[i] points to the first element in that row, while IP[i+1] points to the first element in the next row. In C-like languages (i.e. C, C++, Python etc.) you would loop excluding the last element [¹] whereas in MATLAB-like languages (i.e. Julia, Octave, MATLAB) you loop including the last element. Hence, the former languages implicitly loop over the row and for the latter you have to loop to IP[i+1] - 1 as you correctly pointed out.

I should have probably mentioned this and will do from now on once I write down pseudo-code :)

(Personally, I prefer the C-like looping, although 0-based indexing can be nasty from time to time)

Let me know if this answered your question :)

[¹] For instance in Python, if you loop with range(5, 10) you get the elements [5, 6, 7, 8, 9] but not the last element.