[gov2001-l] Question regarding 3)

Hi all, When it is asked in question 3 of the problem set that the function should have the months I am sampling from as inputs, can I assume that this will be the whole range of months (from 1 to 12) or any range of months? (like for example May, June, July , so that my input for months would be c(5,6,7)). I am writing my function under the assumption that we sample from all available months and not only a specific range, but I wanted to make sure that is is the correct assumption. Thanks, Sanjay ________________________________ From: gov2001-l-bounces at lists.fas.harvard.edu [gov2001-l-bounces at lists.fas.harvard.edu] On Behalf Of Patrick Lam [plam at fas.harvard.edu] Sent: Monday, February 16, 2009 10:06 PM To: gov2001-l at lists.fas.harvard.edu Subject: Re: [gov2001-l] R command for tabulating frequency I'm not aware of a mode function, although it doesn't mean it doesn't exist. good catch on the second point. you're absolutely right! for the purposes of this problem though, ignore the fact that such an issue exists. On Mon, Feb 16, 2009 at 8:35 PM, Lai, Ronald <rolai at hbs.edu<mailto:rolai at hbs.edu>> wrote: Is there simply a "Mode" function in R? For 4d. What is the range? Initially, I thought it would be 0 -> Inf Since ln(0) = error and ln(Inf) = Inf.. this seems like an issue! From: gov2001-l-bounces at lists.fas.harvard.edu<mailto:gov2001-l-bounces at lists.fas.harvard.edu> [mailto:gov2001-l-bounces at lists.fas.harvard.edu<mailto:gov2001-l-bounces at lists.fas.harvard.edu>] On Behalf Of Johnathan Boysielal Sent: Monday, February 16, 2009 8:31 PM To: gov2001-l at lists.fas.harvard.edu<mailto:gov2001-l at lists.fas.harvard.edu> Subject: Re: [gov2001-l] R command for tabulating frequency If you have a vector like n <- c(1, 2, 3, 4, 1, 2, 3, 2, 1, 2) q <- table(n);q # will generate a frequency table n 1 2 3 4 3 4 2 1 You can also apply operations like max() or mean() to q, and use it to subset the original vector. E.g.: unique(n[q>2]) #will list all the elements of n appearing more than 2 times [1] 1 2 Hope that helps, John On Mon, Feb 16, 2009 at 6:39 PM, Rachel West <rwest817 at gmail.com<mailto:rwest817 at gmail.com>> wrote: Very elementary question, I'm sure, but I'm new to R : What is a command in R which would return the frequency elements in a vector, and could be applied with "any" to recognize when a threshold frequency has been achieved? For example, if I have a vector n <- [1, 2, 3, 4, 1, 2, 3, 2, 1, 2], is there a command that will output the number of instances of the most frequent element (i.e, "2" is repeated 4 times), or something similarly useful? Thanks, Rachel _______________________________________________ gov2001-l mailing list gov2001-l at lists.fas.harvard.edu<mailto:gov2001-l at lists.fas.harvard.edu> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l _______________________________________________ gov2001-l mailing list gov2001-l at lists.fas.harvard.edu<mailto:gov2001-l at lists.fas.harvard.edu> http://lists.fas.harvard.edu/mailman/listinfo/gov2001-l -- Patrick Lam Department of Government and Institute for Quantitative Social Science, Harvard University http://www.people.fas.harvard.edu/~plam