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

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

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, I'm quite new to R and are stuck with the following problem. Lets say I have a column consisting of a 1 and the rest zero's, called G0. G0 <- c(1,rep(0,5)) Now what I would like to do is to generate G1 from G0, and G2 from G1 etc... Just for the simplicity, let's say I need the first entry of the column to be increased by 5 each time. How could I do this? Thanks already!

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

Dear R users, I used to "OPTIM" to minimize the obj. function below. Even though I used the true parameter values as initial values, the results are not very good. How could I improve my results? Any suggestion will be greatly appreciated. Regards, Kathryn Lord #------------------------------------------------------------------------------------------ x = c(0.35938587,

Dear R users, I used to "OPTIM" to minimize the obj. function below. Even though I used the true parameter values as initial values, the results are not very good. How could I improve my results? Any suggestion will be greatly appreciated. Regards, Kathryn Lord #------------------------------------------------------------------------------------------ x = c(0.35938587,

I had previously tried to migrate our PDC to a new machine by simply copying the config over and such. That failed miserably but luckily the various home servers (BDC's in samba speak I think) took up the slack. So after much debate, this weekend we moved the PDC back to the original machine. We never moved LDAP off of the original machine, as only samba functions moved. I now know I did

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

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:

Dear R users, I have a data frame in the form below, on which I would like to make normality tests on the values in the ExpressionLevel column. > head(df) ID Plant Tissue Gene ExpressionLevel 1 1 p1 t1 g1 366.53 2 2 p1 t1 g2 0.57 3 3 p1 t1 g3 11.81 4 4 p1 t2 g1 498.43 5 5 p1 t2 g2 2.14 6 6 p1 t2 g3 7.85 I

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

Dear Michael, I just have the same problem you have with samba 2.2.3a on a Suse 8.0 machine and win xp pro. Besides I performed all the steps below. >From my postings I learned that the prob might have something to do with a wrong mapping in smbusers file. It seems to me that the workstation account is mapped to user nobody. Up to now I was not able to solve the prob. Do you have any ideas