gov1000-list September 2004

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Weekend Study Group

by Marie R. Cole

Hi there! Anyone free this weekend for a study group? Marie

19 years, 7 months

revised syllabus

by Kevin Quinn

Hi Everyone, I just put a slightly revised (2 readings added) syllabus up on the course website. Best, Kevin ------------------------------------------------------ Kevin Quinn Assistant Professor Department of Government and Center for Basic Research in the Social Sciences 34 Kirkland Street Harvard University Cambridge, MA 02138

19 years, 7 months

regression application

by Kevin Quinn

Hi Everyone, I just ran across an application of regression analysis that, while not really social scientific, illustrates a number of concepts we'll be talking about in the next lecture. The cite is: Tatem, Guerra, Atkinskon, and Hay. 2004. "Momentous Sprint at the 2156 Olympics." Nature. 431 (30 September) 431: 525. The article and data are up on the course website under the handouts section. Please read this and spend a bit of time thinking about why you do or do not believe their results. We'll talk about this at the next lecture. Best, Kevin ------------------------------------------------------ Kevin Quinn Assistant Professor Department of Government and Center for Basic Research in the Social Sciences 34 Kirkland Street Harvard University Cambridge, MA 02138

19 years, 7 months

Re: HW 1

by Ryan Thomas Moore

> I'm having trouble even knowing where to begin for the coding on these > problems and because I'm not grasping the stats yet, the section 2 > houndout is unfortunatly not helping me much. I did get the Fredman > stats book, so that's definitely helping the more I read. But the main > issue is coding and knowing what the output is supposed to be/look like. > Any tips are great!

19 years, 7 months

[hmdc.harvard.edu #11007] student environment install script

by Ryan Thomas Moore

Gov1000 friends: Below is part of a message from the VNC script author. When you download the script subsequently, you'll need to enter the hostname of a specific iceX machine. Let me know if you have any questions. Ryan ---------- Forwarded message ---------- Date: Wed, 29 Sep 2004 17:12:48 -0400 From: Erik Ray via RT <Director_Support(a)help.hmdc.harvard.edu> Therefore, I have removed "nice..." from the hostname query box and left it blank.

19 years, 7 months

Re: [gov1000-list] symmetry of the Normal distribution

by Ryan Thomas Moore

> Hi Ryan, > > the homework is going pretty well, and I have one minor question: When we > are working with Z ~ N(0,1), and are asked things like Pr(|Z|>c), I just > calculate the Pr(Z>c) and multipy by 2, relying on the symmetry of > the normal distribution along either side of the y-axis. I am assuming > this gives me a correct answer, but would there be a way to actually work > with |Z| in R? The symmetry of the normal curve allows exactly the sort of assumption you've made. Note that for a different member of the Normal family, like N(4,1), the symmetry would not be around the y-axis, but x=4. > R does not seem to want to let me type pnorm(|1|, lower.tail=FALSE). Is > there something else I should try? The R function "abs(x)" returns the absolute value of x. Feel free to use it if you like. Cheers, Ryan

19 years, 7 months

Study group!

by Rebecca Marie Nelson

Yes, it's me again. Just giving a heads up to people that me and others have decided to meet at Friday at 2 in the Science Center computer lab (basement) to work on the 1000 problem set. I'm not sure what other study groups are already formed, but do feel free to come. In my econ study group, we found that it was useful if people worked on what they could in the problem set before meeting. I guess in terms of this class this translates to not just the problems themselves but also the computer programming, since (esp for the first problem set) figuring out Latex and R is atleast half of the work. Let me know if you have any questions. Best, Becky

19 years, 7 months

Re: Visualizing Data (fwd)

by Kevin Quinn

Good news for those of you who still need to buy the Cleveland book-- see below from the COOP... Best, Kevin ---------- Forwarded message ---------- Date: Wed, 29 Sep 2004 15:05:20 -0400 From: tm300(a)bncollege.com To: Kevin Quinn <kquinn(a)fas.harvard.edu> Subject: Re: Visualizing Data The 35 copies of Visualizing Data just arrived. We are pulling copies for customers who reserved them and shelving the rest. Sarah

19 years, 7 months

Importing R graphs

by Rebecca Marie Nelson

Hi- Sorry to clog email boxes some more, but I am wondering if anyone is having success importing R graphs into Latex. I successfully saved my graphs from R as pdf's. The pdf's are saved in teh same folder as my Latex document. Here is my code I used (copied from directly from the hwtemplate.tex document) to import my graph into Latex: \begin{figure}[h] \centering \scalebox{.7}{\includegraphics{graph1.pdf}} \caption{} \label{f1} \end{figure} I use the same code copied two more times for three different graphs (graph1.pdf, graph2.pdf, graph3.pdf) This is the error message I get when I try to complie Latex in the Terminal screen: ! LaTeX Error: Cannot determine size of graphic in graph1.pdf See the LaTeX manual or LaTeX Companion for explanation. Type H <return> for immediate help. 1.65 ...scalebox{.7}{\includegraphics{graph1.pdf}} ? <graph1.pdf> Then the error repeats 2 more times, once for each graph. When I open the .dvi document, I only see the first graph rotated on its side, some of the subsequent text is missing, and then it looks normal starting on the following page. Any ideas? Ryan, did you say you had office hours following section tomorrow? Thanks, Becky

19 years, 7 months

hw guidelines

by Alison Elizabeth Post

Hi all- We just wanted to make sure that everyone is clear on expectations for the homeworks. HOMEWORK GUIDELINES -homeworks must be "sufficiently started" the first time they are turned in to receive credit. This mean that the student will have startedand made significant progress with each problem. The instructors have the discretion to judge what constitutes "sufficiently started" in individual cases. -please include your R code at the end of your problem set. Also, if you work in groups, you must write your own code (i.e., type in commands yourself) rather than cutting and pasting code written by peers -homeworks must be type-written (this makes re-writes easier), preferrably in LaTeX -if you worked in a group, list your group members at the top -please estimate how long the problem set took you and put this at the top -please star any problems that you found to be particularly informative/interesting -homeworks must be turned in at the beginning of class on Mondays and must be printed out rather than emailed Please let us know if any of this is unclear! Kevin, Ryan and Alison

19 years, 7 months

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gov1000-list September 2004