c****n
发帖数: 134 | 1 biomaterials,
J. Biomedical materials research,
Journal of biomaterials science,
Journal of applied biomaterials,
what other journals are important for this area? Thanks! |
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p********g
发帖数: 13 | 2 谢各位大侠指点。
I am actually thinking about double major in Math and Econ. Requirements are
10 courses in each major to get a BS, 12 courses for honor degree. So I can
only take limited math classes. I will have 5 math credit classes by the
end of this semester. So I am just trying to figure out what classes are
more important to take than others. I like number theory, combinatorics,
topology.
So I guess I better take number theory next semester, otherwise I will have
to wait till junior or senior yea |
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s*******n
发帖数: 740 | 3 No need to take courses in undergraduate-level number theory. You can learn
it on your own.
Be sure to take a topology class.
The important courses in my opinion:
Real analysis (basic analysis, measure theory, functional analysis, fourier
analysis)
Complex analysis
Abstract algebra
PDE
ODE
Probability (calculus-based is enough)
Point-set topology and basic algebraic topology
classical differential geometry
differentiable manifolds (advanced differential geometry)
If you are going to do econ, you |
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Y***o
发帖数: 4135 | 4 Anyone know if Fluent data/case files can be imported to CFX? And how?
Thanks, |
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U******u
发帖数: 5829 | 5 once score is coming out, it's done, you cann't change it any more, if you
think about a decent program or specialty for fellowship, you need try to
make your whole package more shining.
similar to match of residency, whole package talks, not just score, which is
one of them, maybe not so important one compared to your residency
performence, research or publication during residency, your RISE score, your
LoRs, your IV skills, etc.
remember, now you cann't and no use to think step3, it's done!
yo |
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k********n
发帖数: 756 | 6 English, English, English
Never take the importance of English disparagingly.
This is the lesson I learned in the past 15 months. It really hurts. |
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e****0
发帖数: 678 | 7 I know that it is funny. I just want to make sure that I am buying the right
material.
http://www.usmleworld.com/Step2CK/step2ck_qbank.aspx
Is this the UW bank for step 2 as well?
Please do not laugh and try to understand a "midlife-crisis" "old" CMG .(LOL)
I have another question. I read some exam experience from step 3 taker, who
said that CK UW was important too for step 3. so should I buy it for a year
so that I can use it for CK and step 3?
Thank you |
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z**********4
发帖数: 467 | 8 I did CK first and then CS. I passed Step 1 in 7 months and CK 4 months part
time along with my Ph.D.qualifying exam and busy lab work . At first, I
thought CS was pretty easy exam. Almost all my friends around me breezed
through it. I studied CS with my Ethiopia roomie. We practiced 2 cases
together and I went to NYC for Dr. Schwartz's course which turned out to be
my worst investment in my whole life. Then I failed CS in Philly (July 14th,
2009). My lessons (1)After 11 months consecutive labor... 阅读全帖 |
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m*******1
发帖数: 328 | 9 Which is the most important in your life?
(1) Health
(2) Money
(3) Career
(4) Family
(5) Friends
(6) Hobbies
(7) God |
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b**********a
发帖数: 62 | 10 The notion that we would have to import nurses makes absolutely no sense,'
President Barack Obama said at a White House Forum on Health Care Thursday
when a lawmaker pointed out that America's huge shortage of nurses may mount
to over 500,000 in the next seven years.--- from this website on march 7th.
The shortage has drawn the attention of President Barack Obama. During a
White House meeting on Thursday to promote his promised healthcare system
overhaul, Obama expressed alarm over the notion th |
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r*****1
发帖数: 37 | 11 Obama did not come up with the notion. The notion was offered by other
people who support foreign nurses. He expressed alarm over the notion and
said “make absolutely no sense.” Namely, he does not support importing
foreign nurses. |
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e***n
发帖数: 286 | 12 w/o the foundation of LP, how can you learn SP?
DP is indepent of other two to some extent.
If you have time, I suggest you don't take course in OR. No use. I mean OR
is great only if you have spent a lot of time to do it. Otherwise, you will
regret you didn't spend more time on more important finance courses such as Financial
Econometrics. |
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l******9
发帖数: 579 | 13 I need to export XML to XML by EXCEL 2010 in Win 7. I import XML file to
EXCEL 2010, then I need to make some changes and then export the changed XML
files.
I got the problem:
"Cannot save or export XML data. The XML maps in this workbook are not
exportable."
My question is simialr as
excel: Cannot save or export xml data. The xml map in this workbook are not
exportable
But, only the reasons for the problem are given there, no solutions. I am
new to XML.
Thanks |
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k****1
发帖数: 133 | 14 If my career goal is to be a portfolio manager at a quant fund, how
important is C++/Java to me? |
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l***a
发帖数: 12410 | 15 indeed... it's always a pain in the butt
IMPORT |
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q********i
发帖数: 795 | 16 顶一下，这个方法很好用。。 Google Gary's SUGI paper "PROC IMPORT WITH A TWIST" for for details....
COPY |
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A*********u
发帖数: 8976 | 17 把excel里那些有内容的部分copy and paste到一个新的file里
除此之外的cells里不要做任何操作
然后再import
Thanks comeandgo, I try to reset mixed=yes, the result is the same. Anyway,
thanks! |
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R******d
发帖数: 1436 | 18 有一个文件要读入，某一列前n个元素都是两个字母，第n个元素是3个字母，
用PROC IMPORT读进去的时候，3个字母的元素的第三个字母被砍掉了，请问怎么避免这
个问题
多谢了 |
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r***k
发帖数: 13586 | 19 把windows csv直接在unix下import就会多一个尾字符，删掉it就行了。 |
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s****y
发帖数: 21 | 20 用sas import一个csv表格，看起来总是检测不到record的末尾标记，造成这个数据被
输入到那个变
量中，数据和变量乱七八糟的，不相吻合。试了把csv转化成txt，或者excel，都不行。
有没有人碰到过这种情况，该怎么解决呢？ |
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b**s
发帖数: 9 | 21 我要读入很多EXCEL FILE TO SAS,但是这些文件的第一条记录是从第五行开始的，前面
有一些说明性的文字（文件名，时间，作者）。如何才能从第五行开始读取，知道最后
。我知道这"PROC IMPORT"里有"RANGE="OPTION,但是我不知道文件的LAST CELL位置，
事实上，这些文件有不同的行数，所以不可能用一个同一的"RANGE="OPTION FOR ALL
OF THEM.不知道有没有WILD CARD FOR THE LAST CELL. |
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A****t
发帖数: 141 | 22 proc import datafile=*** out=*** dbms=*** replace;
datarow=5;
run; |
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o******6
发帖数: 538 | 23 ☆─────────────────────────────────────☆
thegirl (小甜甜) 于 (Tue Mar 17 18:08:23 2009) 提到:
What options do you use for Proc Import from Excel when there are a lot of
columns and some columns can not be read into SAS?
我自己没遇到过这样的情况， 请不吝指教。谢了
☆─────────────────────────────────────☆
libra (秤子) 于 (Tue Mar 17 18:23:07 2009) 提到:
what do you mean 'some columns can not be read into SAS'?
☆─────────────────────────────────────☆
thegirl (小甜甜) 于 (Tue Mar 17 20:21:40 2009) 提到:
According to the In |
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D*********2
发帖数: 535 | 24 Thanks a lot!!!!!
Yes, I do have missing values in the three numeric variables, denoted as "."
, Should I correct it in SAS before importing them into R, like recoded it
is "999"? Is it the common way to do this? Because I was thinking we may
need to avoid hard coding in SAS.
Besides, I doubt it is caused by missing value, here is the error message I
got after read.table
Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,
scan() expected 'a real', got '"117.200"'
Thanks |
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D*********2
发帖数: 535 | 25 Yes, it works when I use
> dat.corr <- read.csv(file="xxx.csv", colClasses=rep("factor", 4), T)
However, I did not notice, even use read.csv, it gave me "factor". Why?
I simply did import to .csv in SAS.
> dat.corr <- read.csv(file="xxx.csv", T)
> sapply(dat.corr, class)
Y X1 X2 X3
"integer" "factor" "factor" "factor"
Y is the one should be factor, say, "007". X1:X3 should be numeric.
Thanks again! |
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D*********2
发帖数: 535 | 26 Thanks. Although the problem is solved. I am still interested in this read.
ssd. I am so confused, would you please give me a hand?
I tried the example in the help document for windows,
read.ssd(file.path(sashome, "core", "sashelp"), "retail",
sascmd = file.path(sashome, "sas.exe"))
no problem, successfully imported.
But back to my case,
statdat <- "/Users/Dreamer1122/Documents/My SAS Files/9.2"
read.ssd(file.path(statdat), "dat_corr_03232010", sascmd = file.path(sashome
, "sas.exe |
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s**c
发帖数: 1247 | 27 SAS 9.2 64bit under win7
用proc import dbms=xls; getnames=yes;
读入excel 2003
变量名长度有限制
超过12 character，变量名自动给改成var1, var2,...
请问这个怎么解决？不想手动在excel里面改，变量太多
3x |
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E********9
发帖数: 7 | 28 Thank you for your reply.
Below is the log I got:
proc import datafile="---.csv" out=sasuser.trial dbms=csv replace;
NOTE: The previous statement has been deleted.
NOTE: The previous statement has been deleted.
3 delimiter=",";
4 getnames=yes;
5 MIXED=YES;
-----
180
6 USEDATE=YES;
-------
180
7 SCANTIME=YES;
--------
180
ERROR 180-322: Statement is not valid or it is used out of proper order.
8 run;
I |
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E********9
发帖数: 7 | 29 That's what I'm wondering.
I'm working on unix so I can't import data in excel files.
Any idea on how to read data stored in csv files like dates in SAS? |
|
|
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a********6
发帖数: 14468 | 32 终于在SAS里实现了，csv和excel都可以import,只是变量多，懒得把它们的属性一一修
改，不知道在分析数据时会有什么危害，欢迎懂行的人给三言两语科普一下。 |
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d*******o
发帖数: 493 | 33 I used to deal with the similar situation. The reason is that: Microsoft
ODBC/OLEDB engine for EXCEL/ACCESS is outdated and limited to handle large
datasets. However, Microsoft ODBC engine for SQL server is designed for
large scale. You could install Microsoft SQL server and use it as a middle
layer to import ACCESS datasets into SAS. |
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p*****o
发帖数: 543 | 34 in my txt file, the delimitor is comma, and field enclosed in double quotes.
eg:
"Jack, Liu", "Lucy, Li", ...
when I imported into sas, I know how to use delimiter = ',', but how can i
handle the comma the double quotes? What option should I use for it?
Thanks a lot |
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t****n
发帖数: 1879 | 35 code:
proc import out = work.n3
datafile="c:\n3.xls"
dbms=excel replace;
range="sheet1$";
getnames=YES;
MIXED=NO;
scantext=YES;
usedata=yes;
scantime=yes;
run; |
|
l*****8
发帖数: 483 | 36 我有很多个excel file， column name 都是在第三行，但每个文件都有不同的数量的
row.
如果用range的话， range='A3:最后一个数据“
我想写macro, 因为每个文件的大小不一样， 请问我如何知道最后一个数据的range.
我只知道起点是A3
不希望需要手工写 A3：N5 或者A3：N99。。。。。
谢谢
%macro read_excel(filename,dataset_name,tab_name);
proc import out=&dataset_name
datafile="C:\Documents and Settings\gguo\Desktop\&filename..xls"
dbms=excel2000 replace;
range ="&tab_name.&A3:最后一个数据的range";
getnames=yes;
run; |
|
d**********r
发帖数: 24123 | 37 知道最后一个数据的range要动到DDE才行。
为什么不直接使用最大的range import呢？然后再到SAS里去掉不要的行就可以了。 |
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l***a
发帖数: 12410 | 38 问个题外的，现在sas还没法直接import 2007/2010版excel的sheet吧 |
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l***a
发帖数: 12410 | 39 我也奇怪过，从excel的第几行开始import，按理说很简单的一个option，SAS还不给提
供一个
f4
，存入Macro variables，然后再rename相应的variables。 |
|
j*******2
发帖数: 309 | 40 Thanks for your reply. The problem is the access dataset is too large. If I
export the dataset as excel, I can only export 65,000 records a time. It's
not convenient. So I want to try importing from SAS. What is DDE? |
|
s****y
发帖数: 297 | 41 例如，对称矩阵数据, 在Excel里省略了对角线以上的数据，因为在计算里面只用到下
半部分的数据。
For example:
0
587 0
1212 920 0
701 940 879 0
1936 1745 831 1374 0
604 1188 1726 968 2339 0
748 713 1631 1420 2451 1092 0
2139 1858 949 1645 347 2594 2571 0
... 阅读全帖 |
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s****y
发帖数: 297 | 42 我试了，加进去报错。。不知道为什么。
PROC IMPORT OUT= WORK.s1
DATAFILE= "E:\schools.xls"
DBMS=EXCEL REPLACE;
RANGE="Sheet2$";
GETNAMES=YES;
guessingrows=1000;
------------
180
ERROR 180-322: Statement is not valid or it is used out of proper order.
MIXED=NO;
SCANTEXT=YES;
USEDATE=YES;
SCANTIME=YES;
RUN; |
|
t****x
发帖数: 1650 | 43 excel data import到sas后，有的字符串太长被截断，有啥方法可以解决？ |
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l*****8
发帖数: 483 | 44 add memosize=1024 and see if it works.
Proc Import datafile="&flname" out=treat4 DBMS=Excel replace; Memosize=1024;
run; |
|
d******9
发帖数: 404 | 45 You can try these 2 methods:
1.Specify the Excel engine. Say, Excel2002.
2. Save the Excel as CSV, then import into SAS.
Do they work for you? |
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d**********r
发帖数: 24123 | 46 Excel import dont have that ability. You have to save as csv or remove the
rows yourself. |
|
w********r
发帖数: 238 | 47 从excel import 到SAS ，有一column长度太长，读的时候被truncated， 请问有什么
办法？ google一下， 可以在前八行加一个dummy row，包含一个最长的record， 但是
我有很多个files 和很多个 sheets，一一手动加不实际。
Thanks. |
|
c*****t
发帖数: 1712 | 48 there is an options guessingrows= in proc import |
|
R*********i
发帖数: 7643 | 49 I'm not 100% sure but as I remember the max # of cols SAS can import from
Excel is 255. Try saving the file as CSV and read in that file? |
|
t********1
发帖数: 799 | 50 yes, this is my problem, my excel has more than 255 columns, and sas only
import the first 255 columns into dataset. |
|
