Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Lyft speeds ahead with its autonomous initiatives

techcrunch.com

Post reply on HN
Print view View original

91–95 of 95 posts

Re: Lyft speeds ahead with its autonomous initiatives

#91

Post by YeGoblynQueenne »

darawk wrote: post #90
YeGoblynQueenne wrote: post #89

Earlier quoted context omitted.

I'm sorry, I don't understand. Which of the above generalises well from small datasets?

Who said they do? I said they generalize better from larger datasets. The entire point of this discussion is that more data is better .

I was referring to this part of our exchange:

ME: There are machine learning techniques that generalise well from few data, but they are not very well known in the industry.

YOU: Sure, and we'd all love to be using those. But even if you generalize well from small datasets, you still generalize better from larger ones.

That is not how those techniques work to my knowledge, so I was asking which ones you had in mind.

Re: Lyft speeds ahead with its autonomous initiatives

#92

Post by darawk »

YeGoblynQueenne wrote: post #91
darawk wrote: post #90

Earlier quoted context omitted.

Who said they do? I said they generalize better from larger datasets. The entire point of this discussion is that more data is better .

I was referring to this part of our exchange: ME: There are machine learning techniques that generalise well from few data, but they are not very well known in the industry. YOU: Sure, and we'd all love to be using those. But even if you generalize well from small datasets, you still generalize better from larger ones. That is not how those techniques work to my knowledge, so I was asking which ones you had in mind.

My point is that they all generalize better from larger datasets. Size is relative and some techniques work better with more or less data. Linear regression, for instance, can work quite well with much less data than a neural net. It just depends on the complexity of the problem.

Re: Lyft speeds ahead with its autonomous initiatives

#93

Post by YeGoblynQueenne »

darawk wrote: post #92
YeGoblynQueenne wrote: post #91

Earlier quoted context omitted.

I was referring to this part of our exchange: ME: There are machine learning techniques that generalise well from few data, but they are not very well known in the industry. YOU: Sure, and we'd all love to be using those. But even if you generalize well from small datasets, you still generalize better from larger ones. That is not how those techniques work to my knowledge, so I was asking which ones you had in mind.

My point is that they all generalize better from larger datasets. Size is relative and some techniques work better with more or less data. Linear regression, for instance, can work quite well with much less data than a neural net. It just depends on the complexity of the problem.

>> My point is that they all generalize better from larger datasets.

Like I say, this is not the case. There are learning algorithms that generalise so well from few data that their performance can improve only marginally with increasing amounts of data, or not at all.

I appreciate that you probably have no idea what I'm talking about. I certainly don't mean linear regression.

Re: Lyft speeds ahead with its autonomous initiatives

#94

Post by darawk »

YeGoblynQueenne wrote: post #93
darawk wrote: post #92

Earlier quoted context omitted.

My point is that they all generalize better from larger datasets. Size is relative and some techniques work better with more or less data. Linear regression, for instance, can work quite well with much less data than a neural net. It just depends on the complexity of the problem.

>> My point is that they all generalize better from larger datasets. Like I say, this is not the case. There are learning algorithms that generalise so well from few data that their performance can improve only marginally with increasing amounts of data, or not at all. I appreciate that you probably have no idea what I'm talking about. I certainly don't mean linear regression.

> Like I say, this is not the case. There are learning algorithms that generalise so well from few data that their performance can improve only marginally with increasing amounts of data, or not at all.

Erm, no. Not unless they are solving the problem perfectly.

> I appreciate that you probably have no idea what I'm talking about. I certainly don't mean linear regression.

I work in the field. I'm quite certain i'm familiar with whatever it is that you think you're talking about.

The category of algorithms that attempt to learn things from few examples is called 'One shot learning'. It's usually in the context of image classification, but it applies equally well elsewhere. These algorithms still learns better from more data.

Do feel free to share an example of an algorithm that generalizes better from less data. I'll wait.

Re: Lyft speeds ahead with its autonomous initiatives

#95

Post by YeGoblynQueenne »

darawk wrote: post #94
YeGoblynQueenne wrote: post #93

Earlier quoted context omitted.

>> My point is that they all generalize better from larger datasets. Like I say, this is not the case. There are learning algorithms that generalise so well from few data that their performance can improve only marginally with increasing amounts of data, or not at all. I appreciate that you probably have no idea what I'm talking about. I certainly don't mean linear regression.

> Like I say, this is not the case. There are learning algorithms that generalise so well from few data that their performance can improve only marginally with increasing amounts of data, or not at all. Erm, no. Not unless they are solving the problem perfectly. > I appreciate that you probably have no idea what I'm talking about. I certainly don't mean linear regression. I work in the field. I'm quite certain i'm fa…

>> Erm, no. Not unless they are solving the problem perfectly.

Well, yes, that's what I mean.

I gave an example here a while ago, of how a Meta-Interpretive Learning algorithm, Metagol, can learn the aⁿbⁿ grammar perfectly from 4 positive examples:

https://news.ycombinator.com/item?id=17837055

That's typical of Metagol, as well as other algorithms in Inductive Logic Programming, the broader sub-field of machine learning that MIL belongs to.

>> Do feel free to share an example of an algorithm that generalizes better from less data. I'll wait.

To clarify, my claim is that there are algorithms that learn adquately from few data and therefore don't "need" more data. Not that less data is better.

That said, there are theoretical results that suggest that a larger hypothesis space increases the chance of the learner overfitting to noise. So what is really needed in order to improve generalisation is not more data, but more relevant data. Then again, that is the subject of my current PhD so I might just be interpreting everything through the lens of my research (as is typical for PhD students).

You work in the field? What do you do?

Post reply on HN