f****s
发帖数: 3078 | 1 比如我有200 个features， 10000个observations，怎样快速来确定哪些features要当
作regressors 呢？
谢谢 |
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b**********u
发帖数: 59 | 2 【 以下文字转载自 board 讨论区 】
发信人: baochaomeigu (baochaomeigu), 信区: board
标 题: remove this feature: ● [通知] ... 成为本俱乐部正式成员
发信站: BBS 未名空间站 (Sun Jul 17 23:54:17 2016, 美东)
remove this feature: ● [通知] ... 成为本俱乐部正式成员
纯粹视觉污染，然后还要一个个地删
最好再把已经发的全部自动删除
● [通知] .... 成为本俱乐部正式成员(87b)
● [通知] .... 成为本俱乐部正式成员(87b)
● [通知] .... 成为本俱乐部正式成员(87b)
● [通知] .... 成为本俱乐部正式成员(87b)
● [通知] .... 成为本俱乐部正式成员(87b)
● [通知] .... 成为本俱乐部正式成员(87b) |
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d******e
发帖数: 7844 | 3 CS里做ML的喜欢称feature。
统计里则称之为variable，仅此而已。
不过有些人也喜欢讲feature引申，基本属于自娱自乐。 |
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d******e
发帖数: 7844 | 4 CS里做ML的喜欢称feature。
统计里则称之为variable，仅此而已。
不过有些人也喜欢讲feature引申，基本属于自娱自乐。 |
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d******4
发帖数: 132 | 5 一次面试被问到如果一个data set有5万个feature,怎么选择？
我回到说lasso，forward stepwise之类常规方法，面试官说不行，说这些都是对付数
量少的feature的。
大家谈谈？ |
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d******e
发帖数: 7844 | 6 面试官没见识，5万个feature根本不算个事儿。
不过他应该是想问，feature数量已经超现有计算能力的情况。
这时候需要用更简单的方法，比如regression的话就做marginal correlation的
screening；两类Classification的话，可以做t-test。 |
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t*****e
发帖数: 364 | 7 They are not really feature selection methods, but dimension reduction
methods. If you mean using loadings of PCA to do feature selection, the
biggest cons are that it's an unsupervised method, which most likely will
give inferior predictive performance. |
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c********1
发帖数: 60 | 9
您说的方法我也用过。有意思的是，feature importance里有几个很靠前的variable是
之前被我用bivariate test(就是对每个feature和repsone单独做test）给filter掉了
。不太清楚该怎么解决这种conflict |
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O*********y
发帖数: 923 | 10 借这个楼搭个顺风车问个问题，PCA（lab5 里面用到）是不是主要用来做数据的预处理
（减少data dimension）用,比如用pca生成图像观察data的特征发现outlier等，然后
用新生成的reduced dimension feature去做modeling去预测？那最后model的分析解释
parameters也是建立在new feature上，谢谢。
我是新手，多谢指教。 |
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j***3
发帖数: 142 | 11 Each element from a collection have n different features V 1..n. and the
elements in the collection have a known distance matrix Mknown
Distance between two elements can be also calculated as ∑|dV| and the
resulting distance matrix as Mcalu
how to select/weight features to maximize the correlation between Mknown and
Mcalu |
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s***n
发帖数: 678 | 12 碰到很多问题都是这样的，有一堆features，然后有一个label，简单的比如就是布尔
值的，比如顾客最后买了某产品或者没有买。公司最关心顾客的features和最后这个
label的关系。
我个人比较喜欢用lasso解决这类的问题，觉得简直是超级利器。要强调预测正确率的
时候再稍微用个rf或者ada啥的。想听听大家怎么看这类的问题？ |
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u******n
发帖数: 5 | 13 Estar Takee: a mobile display and 3D features « smart holographic »
So may be you already met a Nintendo 3DS at Fnac or when you take your
daughter to play Mariokart so if I saw you! Well, the technology that allows
you to display the true 3D without glasses is the same that will integrate
the holographic Takee. And I do not have names in mind, but on a smartphone
in 2012, the technology had already been adapted, a Chinese smartphone
particular who had a small belly as it is difficult ... 阅读全帖 |
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C******g
发帖数: 2930 | 14 White Knight Chronicles launched in Japan missing a rather important feature
next year, it'll have voice chat.
The feature was confirmed during a PS3 press conference at the Tokyo Game
Show earlier today, along with word that the international release of White
Knight will include all of the updates released for the game so far in Japan.
Kudos to localisation that goes the extra mile! |
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C******g
发帖数: 2930 | 15 We just got back from a 'Just Cause 2' event in London where developer
Avalanche made a very special announcement regarding the PS3 version of the
game.
The PS3 version will have a few more interesting features than the X360
version.
More:
- Video capture feature
- Can auto-record/record last 30 seconds of gameplay
- Manual record up to 10 minutes
- Can transfer directly to Youtube |
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w*******y
发帖数: 60932 | 18 Link:
http://www.amazon.com/gp/product/B004HHX9UA
eligible for FREE Super Saver Shipping on orders over $25
Two theatrical hit comedies starring the lovable Jim Varney with all-new
high-definition film transfers! Ernest Goes to Camp features everyone s
favorite pitchman Ernest P. Worrell as he stars in his first feature film as
the bumbling handyman at Kamp Kikakee who is given a chance to finally be a
counselor to a group of juvenile delinquents.
Ernest Goes to Jail bring back the affable bank ... 阅读全帖 |
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w*******y
发帖数: 60932 | 19 Amazon:
http://www.amazon.com/gp/goldbox/all-deals
will host a Amazon Lightning Deal for a Full-featured Android Tablet at a
low price, event starts at 6:00AM (Pacific Time)
Get this best-selling full-featured Android Tablet at the lowest price ever
- this deal is out of this universe!
*Most likely the Samsung Galaxy - Perhaps a better price this time?
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m********r
发帖数: 2895 | 21 Beijing (CNN) -- The Super Bowl usually comes and goes without much notice
in China.
However, this year, America's famous sporting event took a different turn
when a television advertisement featuring Tibetans and a Chicago-area
Himalayan restaurant triggered angry comments from internet users in China.
The ad by Groupon -- a U.S.-based company that helps online group-buyers get
discounts -- was to generate support for The Tibet Fund, an organization
that aims to preserve Tibetan culture.
During... 阅读全帖 |
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B**********r
发帖数: 7517 | 22 BUENOS AIRES, Sept 8 (Reuters) - Wrestling won back its spot in the 2020
Tokyo Olympics after beating bids from rivals squash and baseball/softball
in an International Olympic Committee vote on Sunday.
Wrestling, which featured in the ancient Olympics and in every modern Games
apart from 1900, had been surprisingly taken off the Games in February as
the IOC looked to refresh its sports programme.
Sunday's result marks a sensational turnaround for the sport which
overhauled its rules, administrat... 阅读全帖 |
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发帖数: 1 | 24 老性什么时候搞的这个脑残feature麻痹24小时禁止登陆
。
。
。
。
。
。 |
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O**********g
发帖数: 3962 | 25 几年前的Android就是用这个算法了,这个问题也早有人提出来过。
显然，这不是一个bug，是feature。 |
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z***l
发帖数: 12 | 28 Is $29041 a good price (including destination fee) for a new 2010 Honda
Odyssey EX-L with standard features (No DVD)? I need to pay tax and DMV fee,
that is it. It seems I can not get it lower. |
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a******s
发帖数: 4052 | 29 最需要在冰雪上开车的经验。寒冷地带的司机开几十年前的没啥feature的车也不会出
大事。西雅图的不管开啥车都不灵。 |
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d***a
发帖数: 13752 | 30
我有一辆MDX，该有的feature都有了，一般的雪地，一般的情况下没有问题，
但紧急情况下刹不住，遇到结冰一样打滑。装了雪胎后就完全不一样了。现在
的雪胎比以前改进了很多，开起来的感觉和四季胎差不多，寿命并不差。 |
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D***o
发帖数: 4304 | 31 网上买保险时，有众多选项，车是08 infiniti,谢谢
Safety Features
Safety Devices
Please check all that apply to your vehicle.
Airbags
Anti-lock brakes
Daytime running lights
Electronic stability control
Anti-theft devices
Does this vehicle have anti-theft devices?
Yes No
上面这些都很清楚，下面的除了chip key，其它的感觉看了解释，也不是都很清楚，手
册上面也没有类出来，哪里有信息，我比对着填一下
Please select all devices that apply:
Alarm & Recovery Systems
Non-passive operated alarm
Passive alarm system
Window identification system
Stolen vehicle recovery system
Vehicle Re... 阅读全帖 |
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r****b
发帖数: 89 | 32 我注意到很多车子的侧视镜paint的颜色和车子本身的颜色并不一致。有些车子把body-
colored还当作一个feature.
难道把他们paint成一个颜色还是一个难事吗？ |
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p*****p
发帖数: 19331 | 33 没有
我的车有个feature，不挂到p档熄火，钥匙拔不出来，不知道你们有没有？ |
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g********b
发帖数: 8461 | 34 玻璃水加热.我家W210就有,玻璃水罐子里有根铁管,连在coolant系统里面的.开起来之
后玻璃水会被加热.这个在下雪天特别有用,加热后的玻璃水除冰可猛了,随便一喷,玻璃
上残留的冰全部化掉,而且可以软化wiper橡胶,刮得更干净.
这个feature LS上都没有. |
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k**0
发帖数: 19737 | 35 省力少打两个字而已，这你也信？以为人人和你一样？ lol
说你自己吧，97年的车还舍不得换，不但跑上来show这种useless的feature, 还自认为
自己的车比NSX好, 笑死人了 |
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d*******r
发帖数: 516 | 36 这LZ有点无脑了，油箱这事真不算啥feature，只是不同的种类而已，有的还无油箱门
，还有的没cap，厂家选择了不同种类而已，或许有法律要求的因素之类 |
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a*******8
发帖数: 4534 | 37 that's all because you guys not live in FL or other hot place.
this is the most useful feature when need to cool down the car |
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g*****g
发帖数: 5636 | 39 我想要的物品:
PS3 Band Hero featuring Taylor Swift bundle
单张面值:
可接受的价格(必须明码标价！):
53
物品新旧要求:
new, sealed
2天内到CA
邮寄方式要求:
ML
label ready
买卖双方谁承担邮寄损失(Required if not code only):
before u, after me
付款方式说明:
billpay\\paypal
其他补充说明:
广告的有效期:
物品来源:
我的联系方式:
g************[email protected]
二手交易风险自负！请自行验证是否合法和一手卡！: |
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k****r
发帖数: 5335 | 40 以前有listing信息，现在在某个listing里看半天也没找到啊，搜索某个人的list也看
不出来有没有加feature,我已经非常落伍了a |
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D****9
发帖数: 10889 | 42 it's not relevant to top-rated seller.
Why ebay don't want to make money on featured first? |
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D****9
发帖数: 10889 | 43 it's not relevant to top-rated seller.
Why ebay don't want to make money on featured first? |
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c**0
发帖数: 9331 | 44 if you are not top rate, you will not able to list as featured first |
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l*********u
发帖数: 1660 | 45 你没看清楚看。good til cancel每次自动relist 收一次feature fee.我也吃过大亏，
ebay也就退了一半钱。 |
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D****9
发帖数: 10889 | 46 I also don't understand why ebay don't allow feature. |
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e******5
发帖数: 1334 | 50 CONG!
How long does it take to reach Featured Merchant?
How many feedbacks you have? |
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