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MachineLearning-Lecture10

Instructor (Andrew Ng) :So just a couple of quick announcements. One is, first, thanks again, for all of your Problem Set 1 submissions. They’ve all been graded, and we’ll return them at the end of lecture today. If you’re an SEPD student, and you submitted your Problem Set 1 by faxing it to us, then we’ll return it to you via the SEPD career. And if you handed in a hard copy of your homework, instead of in person or in the late hand in box, then they’ll be available in this classroom at the end of lecture today for you to pick up. And homework’s that aren’t picked up today, we’ll leave at the late hand in box here in the basement of the Gates building; which, by the way, you can actually access after hours, in case any of you didn’t already know that.

So you can pick them up at the end of class today or again, if you’re an SEPD student, and we got your homework by fax, we’ll return it to you via the SEPD career. And if you haven’t seen it already, Problem Set 2 has also been posted on the web page. I think it was posted online last week. So do make sure you download that if you haven’t already. I’d like to say, many of you actually did very well on Problem Set 1. As an instructor, it’s actually sort of personally gratifying to me when I see your homework solutions, and I say, like, “Hey, these guys actually understood what I said,” so that was actually cool. And I shall also say, thanks to all the people in this class for working as graders, and stayed up very late on Monday night to get all the grading done, so just a big thank you to the graders as well.

Let’s see, one more announcement. Just a reminder, that the midterm for this class is scheduled for the 8th of November at 6:00 p.m. So the midterm will be – that’s about two weeks from now, I guess. So the midterm will be open book, open notes, but please don’t bring – but no laptops and computers. SEPD students, if you live in the Bay area, then I’ll ask that you come in person to Stanford to take the midterm in person on the evening of the 8th of November. If you’re an SEPD student, and you live outside the Bay area – so if you can’t drive to Stanford to take your – then please email us at the usual class mailing address: cs229qa@cs.stanford.edu. This is the same address you see on our web pages.

If you can’t physically come in to attend the midterm because you live outside the bay area, then please make sure you email us by next Wednesday, so they will make alternate arrangements for the midterm. And for regular Stanford students, as well; students that aren’t taking this via SEPD, and if you have a conflict. So if you have some other event of sort of equal or greater importance than the 229 midterm, like another midterm of another class that conflicts, please also email us by next Wednesday at the usual staff mailing address to let us know; okay? And so if I don’t hear from you by Wednesday, I’ll assume that you’ll be showing up in person for the midterm. Okay. Any questions about any of that?

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Machine learning. OpenStax CNX. Oct 14, 2013 Download for free at http://cnx.org/content/col11500/1.4
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