u******8
发帖数: 32 | 1 its all depend on the school that you are applying. i would call them and
ask about the GRE. i think you will have advantage over some of other
canidates just because you graduated with them.
I am going to apply this year also. Good luck for both of us. |
|
s****n
发帖数: 147 | 2 Please guide:
I have some ideas and hope to apply to some funding. where/how I can apply
for? ? |
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B*****e
发帖数: 2413 | 3 You can't, but you can apply for the fellowship. Google for funding!
Research Assistant professor can apply for the grant. |
|
|
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j****e
发帖数: 245 | 6 最近好象有挺多关于申请的问题，我会试着发一些这方面的文章，如果大家有什么好的信
息和资料，也请多多分享。谢谢了先！
HOW TO APPLY TO GRADUATE SCHOOL
Linda J. Hayes & Steve C. Hayes
http://psych.hanover.edu/handbook/applic2.html
Admission into graduate programs in psychology can be quite competitive. High
quality programs are, of course, more competitive than lower quality programs
in general doctoral programs are more difficult to get in than master's
programs. Usually applied programs more difficult to get in than basic
programs.
The primary determinan |
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f***a
发帖数: 329 | 7 看报错的信息, FUN要求以dat的每一个行作为input, 你定义的F要求两个input, 当然
不行了. 如果是为了求和的话
apply(dat,1,sum)
~~~~~~~~~~~~~~~~~~~~~~
不是为了求和，这只是个例子。就是FUN在这种有两column的input的情况下我不知道该
怎么办算方便。用for循环太慢了吧，能不能用apply实现呢？
报错是肯定的 FUN 要求是
'FUN' must be a function (or the name of it) which expects at
least two arguments and which operates elementwise.
你定义的FF 是以向量形式运算的. 解决的办法是人为elementize, 比如:
> x <- 1:5
> FF1 <- function(a,b){
+ lapply(seq(along=a), function(t) sum(a[t] * x + b[t]))
+ }
> outer(1:2,4:6,FF1)
[,1] [,2] [,3]
[1,] 35 40 45 |
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s*****n
发帖数: 2174 | 8 第一个问题, 可以用apply实现. 但你要确定F的参数只有一个, 这个参数在实际操作中就是矩阵的每一行. 比如下面这个例子
dat <- matrix(1:10,,2)
colnames(dat) <- letters[1:2]
F <- function(t){t[1] + t[2]}
apply(dat,1,F)
注意定义的是 F(t), 而不是 F(t[1], t[2]).
seq(along=a) 在这里不是1, 而是6. 如果你觉得是1, 说明你没有理解outer的工作原理. outer(a, b, FUN) 的执行原理, 是先把a, b 做成相应的矩阵(本质还是向量)A, B, 然后一起传给FUN. FUN要对A和B的对应元素进行操作. 这里
a 是 (1,2), b是(4,5,6). 传递给FUN的分别是(1,2,1,2,1,2)和(4,4,5,5,6,6)
你定义的FF, 是把A和B看作向量来和x进行操作的, R会认为需要把一个长度为6的向量和一个长度为5的向量相乘, 然后再和一个长度为6的向量相加, 所以报错.
下面的例子可能能对你的理解有帮助:
x <- 1:5 |
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s*****n
发帖数: 2174 | 9 apply, sapply, mapply 这些本质上都是lapply的衍生物.
用于不同情况.
apply主要用于对于矩阵进行某种行或列的计算.
sapply基本就是lapply, 只不过它会return矩阵, 而不是lapply那样return list. |
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O*********r
发帖数: 290 | 10 非常感谢,关于apply和sapply, tutor上讲的好象不是很清楚, 可以理解为apply和
sapply可以互换的吗? |
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D******n
发帖数: 2836 | 11 to correct, s/l apply operates on the object elementwise...
for a matrix it applies FUN to each of its elements. |
|
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s*******q
发帖数: 310 | 13 statistics新生master，老师让选applied linear algebra 5316
这个和国内的线性代数一样吗？
只看英文版本的applied linear algebra and matrix analysis Thomas S. Shores写的可以不？
我菜鸟一个，过几天上课了，想找书来先看看。大学学的数学都忘的差不多了，多谢赐
教 |
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k*******a
发帖数: 772 | 14 applied的话，应该数学要求不高，不过可以先从基础学起，比如
probability and statistics II,
statistical data analysis II,
applied regression analysis, |
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a***r
发帖数: 420 | 15 比如我有两个matrix，A 和 B
A
[,1] [,2] [,3] [,4] [,5]
[1,] 1 5 9 13 17
[2,] 2 6 10 14 18
[3,] 3 7 11 15 19
[4,] 4 8 12 16 20
B
[,1] [,2] [,3] [,4] [,5]
[1,] 5 9 13 17 21
[2,] 6 10 14 18 22
[3,] 7 11 15 19 23
[4,] 8 12 16 20 24
一个two argument的function，比如cor吧
如何用apply实现对A,B的每对对应column做cor(A[,i],B[,i])呢？
谢谢！ |
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D******n
发帖数: 2836 | 16 lol,果然一有apply，就会出现songkun大侠。 |
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s******y
发帖数: 522 | 17 比方说有一个函数summary，来提取一个vector的summary stats
summary = function(x){
mean = mean(x)
sd = sd(x)
max = max(x)
list(mean=mean, sd=sd, max=max)
}
把函数apply到matrix Z的每一列
apply(Z , 2, summary)
但是返回的格式是list of lists
$result.1
$result.1$mean
[1] -1.522619
$result.1$sd
[1] 1.101962
$result.1$max
[1] 2.10
$result.2
。。。。。。
但我想得到的结果是一个data frame，包含mean, sd, max三个变量
应该怎么改呢 |
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A*****n
发帖数: 243 | 18 MCMC没法并行化，但是你的20k个subject可以并行化，而不是使用loop
最简单的一个方法就是用parallel包的mclapply函数，如果
机器的cpu比较多的话，时间就可以省下啦了。
apply的速度和for loop没有太多的区别，google一下可以发现有很多的
apply vs. for速度比较的blog。 |
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s*****n
发帖数: 2174 | 19 apply并不比for loop快, 一般情况下反而更慢. 只不过apply能让code比较elegant而
已.
lapply要快不少.
其实用R的话, 如果比较在意efficiency, 最需要注意的是如何handle objects, 那个
才是R慢的最常见原因. 其次才是avoiding explicit loops. |
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f******e
发帖数: 541 | 20 St. Louis 的统计分析职位有感兴趣的吗？是猎头找上我的。我可以提供他的邮箱。
Kyle Campeau <[email protected]
/* */>
Applied statistican
Requirements
The person should have a solid knowledge base in applied statistics, data
interrogation and modeling data for research and production use preferably
in SPSS Modeler and R.
In this position the candidate will also provide insight into data trends
and correlations with processes.
Candidate must be extremely self motivated and possess excellent people
interaction and communicatio... 阅读全帖 |
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J*X
发帖数: 1001 | 21 作用对象是a，具体是column，但是还要告诉apply你想干啥不是？
比如你可以打 apply(a,2,mean) |
|
y****g
发帖数: 4 | 22 【 以下文字转载自 Food 讨论区,原文如下 】
发信人: yogigg (小龙.幺哥.Tummy), 信区: Food
标 题: apply food second 板副
发信站: The unknown SPACE (Tue Nov 7 15:55:16 2000) WWW-POST
keep our greenplum JJ as the first BF
I can do all the other work :-)
food was the most important thing in my life,
food is the most important thing to me now,
food will also be the most important thing in the future
apply food board BF |
|
w********h
发帖数: 12367 | 23 I think I can attract as many people who love literature as possible...
If spy is willing to be a BF, that's better..
also welcome anybody else to apply for BM to compete with me or BF to apply
together with me...
The aim and my style are:
(1) Get a healthy board to discuss Literature;
(2) Compete with other two Literature-related boards such as Reader and Prose;
(3) Literature discussions are welcome, but personal attack is strictly
forbidden. |
|
x******r
发帖数: 367 | 24 Hello!
I would like to apply for the BF of mathematics to help diana to make the
mathematics board better.
I have a strong interest in abstract algebra, combinatorics, number theory and
numerical methods.
What's more, I would like to incite more topics in applied mathematics if
possible.
Thanks for your support. |
|
x******r
发帖数: 367 | 25 Hello!
I would like to apply for the BF of mathematics to help diana to make the
mathematics board better.
I have a strong interest in abstract algebra, combinatorics, number theory and
numerical methods.
What's more, I would like to incite more topics in applied mathematics if
possible.
Thanks for your support. |
|
发帖数: 1 | 26 OPEN POSITIONS: Sencom, Inc. (www.sencominc.com)
Positions open in: Statistics and/or Econometrics
Location: Dearborn, Michigan
Sencom has four newly opened positions in statistics/econometrics, working
onsite at the best managed automobile manufacturing company in the US. The
group is responsible for the Marketing, Sales, and Services Division (MS&S)
in statistical modeling, forecasting, optimization, new methodology
development and system implementation, and the corresponding globalization
... 阅读全帖 |
|
w*******y
发帖数: 60932 | 27 Link:
http://www.facebook.com/homedepot
The Home Depot Facebook Exclusive: Cooking up something good with the Grill
Craft 4-Piece Stainless Steel Tool Set for the Grill & BBQ. Just $5.00 plus
free shipping when you buy it on our wall (taxes apply). Facebook only while
supplies last. This item does not ship to AK/HI. Makes a great gift for
your King or Queen of the BBQ.
Click BUY NOW for our SECURE, in-stream shopping experience. The Grill Craft
4-Piece Stainless Steel Tool Set is just $5 plus fr... 阅读全帖 |
|
w*******y
发帖数: 60932 | 28 REI members receive a $100 gift card to REI when they apply and are approved
for an REI Visa card:
http://www.reivisa.com/credit/offer.do?redirect=ext42&lang=en
through August 15th, 2011.
$100 REI Gift Card when you apply by 8/15/11 and make any purchase by 9/15/
11
5% rebate on all REI purchases
1% rebate on non-REI purchases
No annual fee
|
|
U***J
发帖数: 5998 | 29 Furloughed federal workers can apply for unemployment
Friday - 4/8/2011, 5:07am ET
Neal Augenstein, wtop.com
WASHINGTON - If the government does shut down, a lot of people won't be
getting their usual paychecks.
Here's what you need to know if you are told to not show up for work.
Government workers can apply for unemployment.
You file in the state in which you work, but it's different in each
jurisdiction.
In Maryland you qualify for unemployment from the first day of a shutdown,
and could get ... 阅读全帖 |
|
R***a
发帖数: 41892 | 30 fail的话自己找别的工作。
也有大户人家需要仆人的。虽然大户人家被禁止阉割奴仆了，但是你自宫再去apply
是不禁止的。 |
|
m***n
发帖数: 12188 | 31 首先，作为皇家侍从的太监和阉人并非一个概念。
1） 先秦有宫刑，和砍手，砍脚等都属于“肉刑”。比如对强奸犯就是宫刑，被宫的都
是阉人。还有天阉。民间还有私自阉割的，比如仇杀，报复，变态色情，无意过失，等
等。司马迁是受宫刑的最有名的一个。不过汉朝自绨萦之后就废除了全部肉刑，宫刑也
不复存在了。
2） 先秦直到汉朝，作为皇家奴隶的太监，最早也并非阉人，至少并非全是阉人。多半
太监不是阉人。只是一个职位。在唐朝以后，太监才变成全是阉人。
3）中国肉刑除了砍手脚，割耳朵，开始阉人，是从周朝开始的，这个技术是来自游牧
民。经常阉割牛马，自然技术就发展了。
4）周朝有国家瞻养残疾人制度。比如盲人都被政府瞻养，并且培训为乐师，类似于当
代我共喜欢让盲人当按摩师，政府有教育和职业资助。
先天畸形多半被父母抛弃，则进入了图书馆工作，也因此先秦道家人物和世外高人里面
，各种畸形残疾特别多，协肩，翘腿，等等。而周朝给阉人（天阉，宫刑，意外失去生
殖器，生殖器畸形被父母抛弃的）的职务则是后来的太监担任的各种皇家和政府服务业
，也包括图书馆，史官，助理，等。比如，赵高因犯法被宫刑，于是进入了王宫管理图
书资料... 阅读全帖 |
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k*******2
发帖数: 1429 | 32 BT proteins are toxic to human cells
Cytotoxicity on human cells of Cry1Ab and Cry1Ac Bt insecticidal toxins
alone or with a glyphosate-based herbicide
Mesnage R., Clair E., Gress S., Then C., Székács A., Séralini G.-E
Article first published online: 15 FEB 2012, Journal of Applied Toxicology
DOI: 10.1002/jat.2712
ABSTRACT
The study of combined effects of pesticides represents a challenge for
toxicology. In the case of the new growing generation of genetically
modified (GM) plants with stacked t... 阅读全帖 |
|
A*Q
发帖数: 1579 | 33 你们根本就没看懂这句话，她说的是到美国这一茬没有申请政治庇护，而是申请的正常
签证。她到美国后申请了政治庇护。
她要的就是这个效果。
I didn't apply for political asylum; I was explicitly told not to attract
attention.
I got a student visa, which was secured through a family friend at the
University of New Mexico. |
|
|
g******t
发帖数: 11249 | 35 因为applied math研究的是methods
方法都在脑子里，谁都拿不走
甚至别人都不一定能听懂你在说什么
（当然了也没兴趣听）
其他学科，研究方法基本是固定的，重要的是data
数据要花大量的实验去收集数据
data在谁手里谁就牛逼
不幸的是数据的产权基本属于老板 |
|
l****z
发帖数: 29846 | 36 Free speech rights don’t apply if liberal crowd takes offense
by Jammie
Liberals love the First Amendment. Except when they hate it.
Recently I wrote in my regular Washington Times Monday column, “How To
Save Your Family,” a piece lamenting the confusion created by gender-
bending fashion models and the emerging sentiment that little children
somehow show their true, transgendered selves when they show “
inquisitiveness about the other sex, and all the trappings of male or female
life.” ... 阅读全帖 |
|
t**********i
发帖数: 113 | 37 “I had a goal of achieving the office of city executive officer [in JROTC].
Well, no one had ever done that in that amount of time … Long story short,
it worked, I did it. I was offered full scholarship to West Point, got to
meet General Westmoreland, go to Congressional Medal dinners, but decided
really my pathway would be medicine.”
.........
The West Point spokeswoman said it certainly is possible Carson talked with
Westmoreland, and perhaps the general even encouraged him to apply to West
Po... 阅读全帖 |
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s*********r
发帖数: 9493 | 38 发信人: gemini2012 (双子AB), 信区: USANews
标 题: 最新：DNC schedule and prime time speakers
发信站: BBS 未名空间站 (Wed Jul 20 12:22:53 2016, 美东)
day 1: Hillary for Diversity
prime time speakers:
Sean Patrick Smith:
Fight for the Right of Peeping and Taking Pictures in Women's Fitting Rooms
Judy Chu：
Apply AA to All Universities, Companies and Army |
|
W*****B
发帖数: 4796 | 39 人家招工时明确写了underrepresented minorities are encouraged to apply， 然后
最下面写上我们不按照race，gender，sexual orientation等等歧视。
实际就是种族歧视，但是还要冠冕堂皇的歧视你。 |
|
f*******t
发帖数: 1309 | 40 我的车被卡车撞了，但是开了长途什么都没问题。 离开A地的时候把title 签字留给
了朋友， 因为朋友说需要辆车， 就给了我几百块把车留下了。
保险公司把这辆车当做total loss 给我支票赔偿了， 并问我要不要keep这辆车， 我
选择要这辆车。
现在接到保险公司的支票， 说我要apply for a salvage title, 请问我可以不申请吗
？不申请会有什么后果？ 因为title已经留给朋友了
谢谢 |
|
v*****z
发帖数: 3067 | 41 you have to apply for a salvage title.
no other way. |
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s********1
发帖数: 27 | 42 We are looking for candidates with PhD/M.Eng in chemistry ,chemical
engineering, or related fields, with a particular emphasis on applied
catalysis.
If you are interested, please send your CV and expected joining date to
l**[email protected]
For more information on ICES, please visit www.ices.a-star.edu.sg.
Education Level Doctorate/Master
Job Function Scientific Research & Development (R&D)
Hiring Research Institute / Organisation Institute of Chemical &
Engineering Science |
|
b********e
发帖数: 1796 | 43 AA 100 off 250 的coupon，可以apply到最多六个人（max saving 100*6),只要是在一
个itinerary上。
terms and conditions:
"When used according to its terms, the promotion code entitles the user to a
$100 flight discount on a published round-trip or one-way fare of $250 or
more to any American Airlines destination, excluding codeshare flights, when
purchased on AA.com between 8/18/11 and 9/5/11, and for travel between 9/6/
11 and 2/16/12. Travel is not available on the following embargo dates: 11/
18/11 - 11/23/11, 11/26/... 阅读全帖 |
|
发帖数: 1 | 44 Title: Applied Scientist for Search
Job Location: Santa Clara, CA
Job Type: Full-time
Responsibilities:
Include but not limited the following three main directions:
• Develop C++-based runtime system to provide better user experience
to our
customers;
• Implement prototypes of the algorithms and models in C++/Python
• Identify appropriate metrics to measure the performance of search
system.
Qualifications:
• Master or Ph.D. in Computer Science, Electrical and Computer
En... 阅读全帖 |
|
w*******3
发帖数: 1839 | 45 出售NM/Neimanmarcus道歉coupon 10% off，可以全额抵用，apply beauty @ 50，
exp, 1/15/2018
qq,329422301,email, [email protected] |
|
N*****N
发帖数: 1605 | 46 ☆─────────────────────────────────────☆
unknowns (我怎么有这么多不知道的东西) 于 (Wed Jun 6 18:11:08 2007) 提到:
Summary::
Make no payments for 3 months Apply，
ebay/amazon/paypal?:
ebay
医生/病人？:
seller
金额:
细节:
医院的这个东东是不是一定得申请信用卡？申了当场能批，然后就能用？有个病人问我每月给我pay多少钱，我才明白可能是问这个
☆─────────────────────────────────────☆
zrzhao (zrzhao) 于 (Wed Jun 6 18:12:51 2007) 提到:
和你没关系吧。医院就是收利息。
☆─────────────────────────────────────☆
unknowns (我怎么有这么多不知道的东西) 于 (Wed Jun 6 18:15:49 2007) 提到:
病人问了，我得给解释阿
和你没关系吧。医院就是收利息。 |
|
t******r
发帖数: 303 | 47 刚redeem的code一apply就说已经用过了，可order summary明明
是原价。是不是被人盗了？那也太快了，前后不超过10分钟。
好几次都这样了。不明白怎么回事，特上来求教。 |
|
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g**a
发帖数: 2129 | 49 it has problem,for sure. And there are several ways to test the code except
for applying to gc. |
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d********f
发帖数: 43471 | 50 土人用起来当然有问题啦，一个account不能直接apply，换一个就lock住了
except |
|
