On 10-11-2012, at 21:09, Greg Snow wrote: > This is to all R-helpers (Sarah is just the one that I am replying to), > > Have we become a little too draconian on the "not a homework help list" > issue?
Probably. > > Now if someone just states the HW question, gives no indication that they > have done anything to try to solve it themselves, and expects us to give > them a completed answer without effort on their part, I am happy to light > up the flame thrower (and if they are my students they could very well lose > points for poor questions). But I think there are cases where it is > reasonable for us to help point students in the right direction (at our > own discretion, but without a knee jerk "no homework" response). Some of > the types of questions that we have seen on this list that I think would > qualify here would include things like: > > I already turned in my homework after using <program other than R> that the > teacher uses, but now I would like to learn how to do it in R as well, can > anyone give me pointers to which help page(s) I should read to learn how to > do <topic>. > > My teacher says we can use any program we want and I chose R, but the > teacher and TA's don't know R, I have figured out most of this problem > <problem statement and code tried so far>, but I can't figure out how to do > this last part, any pointers? > > I fit this model <model info> to the HW data using <R commands> and these > are the results that I see <results>, but the answer in the book while > matching on some things has a different value for these coefficients <list > with other numbers>. I am thinking that R must be using a different > default or encoding than the book, can anyone explain the reason for the > difference or give a pointer to where it is documented? > > And other cases where a student is clearly doing homework, but shows that > they have made an effort on their own and is not demanding we do the work > for them, but would rather like a pointer or hint to help them learn > better. I vote that we adopt a policy (unofficial) that if a student shows > effort and asks a reasonable question that we respond with answers that > will help the student continue to learn (and become a better member of the > R community). What do others think? > I would tend to agree with the last paragraph. Berend > > On Sat, Nov 10, 2012 at 11:40 AM, Sarah Goslee <sarah.gos...@gmail.com>wrote: > >> This is not a homework help list. >> >> On Saturday, November 10, 2012, parvez_200207 wrote: >> >>> hi >>> could you help me to solve this issue >>> >>> Question: >>> Using command rweibull(100,8,15), simulate n = 100 realizations from >>> Weibull(8; 15) distribution. Using the simulated sample, compute the >> sample >>> mean, variance and standard deviation of these observations. >>> >>> I am trying like this >>> >>> sim<-rweibull(100,8,15) # simulated sample >>> SM<-mean(sim) # simulated sample mean >>> var(sim) # variance >>> sd(sim) #SD >>> >>> Thank you in advance. >>> >>> Parvez >>> >>> >>> >>> -- >>> View this message in context: >>> http://r.789695.n4.nabble.com/sample-mean-variance-and-SD-tp4649190.html >>> Sent from the R help mailing list archive at Nabble.com. >>> >>> ______________________________________________ >>> R-help@r-project.org <javascript:;> mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> >> -- >> Sarah Goslee >> http://www.stringpage.com >> http://www.sarahgoslee.com >> http://www.functionaldiversity.org >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > Gregory (Greg) L. Snow Ph.D. > 538...@gmail.com > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
