similar to: How does the data.frame function generate column names?

I have a data set covering a large number of cities with values for characteristics such as land area, population, and employment. The problem I have is that some cities lack observations for some of the characteristics and I'd like a quick way to determine which cities have missing data. For example:

I need to import a large number of simple, space-delimited text files with a few columns of data each. The one quirk is that some rows are missing data and some contain junk text at the end of each line. A typical file might look like: a b c d 1 2 3 x 4 5 6 7 8 9 x 1 2 3 x c c 4 5 6 x 7 8 9 x I'm trying to avoid having to pre-process the text files, as they all sit on an ftp site that I

Hi all, I frequently encounter datasets that require me to repeat the same calculation across many variables. For example, given a dataset with total employment variables and manufacturing employment variables for the years 1990-2010, I might have to calculate manufacturing's share of total employment in each year. I find it cumbersome to have to manually define a share for each year and

I'd like to summarize several variables in a data frame, for multiple groups, and store the results in a data.frame. To do so, I'm using by(). For example: df<-data.frame(a=1:10,b=11:20,c=21:30,grp1=c("x","y"),grp2=c("x","y"),grp3=c("x","y")) dfsum<-by(df[c("a","b","c")],

Hi All: I'm looking to find out a bit more about how subassignment actually works and am hoping someone with knowledge of the details can fill me in (I've looked at the source code, but my knowledge of C is lacking). In the case of vectors, my reading of ?"[" would indicate that for a vector, vec <- 1:25, vec[c(1,5,25)] <- c(101,102,103)is functionally the same as

Dear R-help, Please can someone explain how to put a column name on an output data.frame. ##Starting with a data.frame with 3 columns (d$Year, d$NoIndiv, d$wtd_tl) yr_ind <- split (d$NoIndiv, d$Year) yr_tl <- split (d$wtd_tl, d$Year) ann_ind <- sapply (yr_ind, sum) ann_tl <- sapply (yr_tl, sum) av_tl <- ann_tl/ann_ind d2<- data.frame (av_tl) ##This gives me a data.frame

Hi Stephan, On Wednesday 02 September 2020 19:59:57, Stephan Bosch wrote: > > > On 29/08/2020 21:04, Alec Moskvin wrote: > > Hello, > > > > I have a rule to always delete a header. If the message gets fileinto'd, > > the header is gone, but if it's delivered into the INBOX through > > implicit keep, the header does not get deleted. > > >

Hi to all.. I've setup a Samba domain and now having a hard time setting up Unix to Windows user mapping. As an example on the server, user is 'agi', and at the workstation I want an 'Alec Joseph' as the user name. If I log on from a Linux desktop using the alias connection goes through: # sudo tail -f /usr/local/samba/var/log.smbd | grep 'Alec Joseph' Got

Hi All: I have some basic questions about Cairo graphics engine. I'm trying to use the Cairo package to produce PDF output, mainly because I perceive it to be easy to use with a wide variety of fonts. But right now, I'm stuck trying to figure out what fonts are available to be used with Cairo, specifically the CairoPDF function. I've been able to successfully produce some test PDFs

How do I tell clang to use my target CPU's assembler instead of my host's assembler? I found the -fuse-ld option to tell it to use my linker but didn't find an option for the assembler. Thanks. ________________________________ From: llvm-dev <llvm-dev-bounces at lists.llvm.org> on behalf of Craig Topper via llvm-dev <llvm-dev at lists.llvm.org> Sent: Monday, March 25, 2019

Hi, XYZ is your actual architecture? Are you trolling? Alec

Hello, I'm trying to set up the submission proxy, but if I set submission_relay_ssl = starttls, it crashes. Without it, it works. Please find the details below. Thanks, Alec dovecot[256855]: submission-login: Login: user=<alec>, method=PLAIN, rip=::1, lip=::1, mpid=257033, secured, session=<kMd1B9uthLUAAAAAAAAAAAAAAAAAAAAB> dovecot[256855]:

Possibly protobuf or capn proto would be much more clean alternatives to json. I was working with interpreting instruction semantics a while back, and you shouldn't have to write a parser to get the data structure back into coherent form, you can get what you want automatically and have the structure isolated into a common schema. On Sat, Jun 20, 2015 at 9:22 AM, Stephen Cross <scross at

Thanks, Paul. How do I generate the 'as'? When I look at the bin directory , there is an llvm-as that takes llvm assembly as input but no 'as'. ________________________________ From: paul.robinson at sony.com <paul.robinson at sony.com> Sent: Tuesday, March 26, 2019 1:58 PM To: mm92126 at hotmail.com; craig.topper at gmail.com Cc: llvm-dev at lists.llvm.org Subject: RE:

... >... >>gem install wxruby >> >Great. Many, many thanks to yourself and all involved. > >FWIW, I''ve just, in the last min, installed it on an i586-linux box. >The nearest option being i686-linux. Another newbie question from me, I''m afraid. The gem installs reported successful install; but I can''t find wxruby. (Using

Yep we have our own parser <https://github.com/vinzenz/libpypa/> and we would love to see other people use it. When we looked around at some other Python parsers we didn't feel like any of them were easy to extract and use on their own, so we wrote our own and I think were able to keep ours well-separated. There are some things that make parsing Python somewhat difficult to do in a

I'm probably dense - CentOS 4.1 # cat /etc/sysconfig/selinux ..snip... SELINUXTYPE=targeted # su - Alec # tail -n 3 /var/log/messages Aug 31 08:48:26 srv1 su(pam_unix)[31435]: session opened for user Alec by root(uid=0) Aug 31 08:48:26 srv1 su[31435]: Warning! Could not relabel /dev/pts/0 with user_u:object_r:devpts_t, not relabeling.Operation not permitted Aug 31 08:48:27 srv1

Thanks, happy to of confirmed. With that in mind, will use the AST modules provided by the languages (with the exception of libclang for C++). Antoine: Am aware of Numba, nice job there BTW. So is there a [decoupled] LLVM parser which I can use to read Python files and analyse objects (including computing their attributes in OO and setattr scenarios)? On Wed, Jul 1, 2015 at 10:23 PM, Antoine

Hi folks, Can anyone suggest an efficient way to do "matching without replacement", or "one-to-one matching"? pmatch() doesn't quite provide what I need... For example, lookupTable <- c("a","b","c","d","e","f") matchSample <- c("a","a","b","d") ##Normal match()

Hello, I have a rule to always delete a header. If the message gets fileinto'd, the header is gone, but if it's delivered into the INBOX through implicit keep, the header does not get deleted. Interestingly, if I remove the "if duplicate" filter, the header does get deleted as expected. I'm using the latest Dovecot 2.3.11.3 / Pigeonhole 0.5.11. Any idea why this is