similar to: mask a matrix

I have a data frame. And I'd like to subset according to rownames. subset(mydataframe, rownames(mydataframe) == myrow, select = mycols) it turned out that "myrow" cannot be a vector. But I have multiple rows to pick. Is there a way to get around this problem?? Thank you for your help!! Lei Jiang Department of Chemsitry University of Washington Box 351700 Seattle, WA 98195

Hi, there. I am trying to read multiple files into R, but I got following message Error in file(file, "r"): All connections are in use. I clean up memory everytime I read in one file. Do i have to somehow release file connection everytime i read in one?? Thanks. Lei Department of Chemsitry University of Washington Box 351700 Seattle, WA 98195 Phone: 206-616-6882 Fax: 206-685-8665

I am completely new to R, but have some bg in cs and stat. since R has an interactive programming environment, I thought I could write my command in a file and run it in batch mode in the Rgui. but it didnt work. I checked the doc. it said Rcmd BATCH inputfile. it didnt work either. Can someone help? thank you. thank you. also if you can shed some light on passing command line arguements (like

I want to subset the dataframe based on certain values in a row. for each row in my dataframe if ANY one value of a particular set of columns satisfies cond append a logical value true at the end of the row else append a false at the end of the row in the end I want to be able to subset the whole data based on the appended true or false value. I could literally code like this, but I think

Full_Name: jarek tuszynski Version: 1.8.1 OS: windows 2000 Submission from: (NULL) (198.151.13.10) Example code: > a=array(1:27, c(3,3,3)) > apply(a,2, var) [,1] [,2] [,3] [1,] 1 1 1 [2,] 1 1 1 [3,] 1 1 1 [4,] 1 1 1 [5,] 1 1 1 [6,] 1 1 1 [7,] 1 1 1 [8,] 1 1 1 [9,] 1 1 1 > apply(a,2, mean) [1]

Hi friends in PHP there is a direct function GetImageSize(), with it I can easily determine the dimentions of an image file. How can I do in RoR. Please help me out Thanks in advance -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060505/13ba1640/attachment.html

Dear R users I have the matrix of the centres of some clusters, e.g. 20 clusters each with 100 dimentions, so this matrix contains 20 rows * 100 columns numeric values. I have collected new data (each with 100 numeric values) and would like to keep the above 20 centres fixed/'unmoved' whilst just see how my new data fit in this grouping system, e.g. if the data is close to cluster 1

Dear all, I am trying to create a lattice plot which consists of 1 xyplot and 2 histograms (each for x and y). My first try was like this: x<-rnorm(1000) y<-rnorm(1000) xy <- xyplot(y~x) hist.x <- histogram(x) hist.y <- histogram(y) print(xy, position=c(0, 0.2, 1, 1), more=TRUE) print(hist.x, position=c(0, 0, 1, 0.33),more=T) print(hist.y, position=c(0.8, 0, 1, 1)) Ok, this is

Dear Colleagues,   I am running a three-way mixed-design ANOVA, with one manipulated IV, a group membership IV, and pre-/post- within subject factor. I am interested in the three-way interaction effect. The regular ANVOA is problematic, because (a) the sample sizes are very unbalanced, due to the group IV, (b) the homogeneity of variance is violated, and (c) the homogeneity of covariance is also

Hi, When I''m using the Prototype version attached to script.aculo.us 1.6.5 (Prototype 1.5.0_rc1 revision [5462]) I get some "Object doesn''t support this property or method" in the Effect.BlindDown method (when the method tries to get the dimentions). If I''m using the version of prototype that was attached to 1.6.4 I do not get this error. Is this a known

Hi Abbas, Before I try to give you answers, I just want to mention that you should send R related reqests to the R-help list, and not me personally because (i) there's a greater likelihood that it will get answered in a timely manner, and (ii) people who might have a similar problem down the road might benefit from any answer via searching the list archives ... anyway: On Sep 5, 2009, at

Dear List, This is just a programming problem which i cannot seem to figure out. I am trying to get a set of power from a test (say, kolmogorov smirnov) out of a distribution (say, G-K distribution) as follows. I am trying to reduce to pain of writing the whole set of data points (p# below) using "for" loop. However, I seem to have some problem in it as the output "M" does not

On Sun, Dec 18, 2016 at 11:58 PM, Jonas Maebe <jonas-devlists at watlock.be> wrote: > > Actually, there's another —even more fundamental— problem: the longjmp > will always restore the non-volatile registers to the contents they had > at the start of the try-block, which is not what LLVM expects when > entering an SEH-based landing pad. > The SjLjEHPrepare pass tries

Hallo Everybody How do you specify arguments for a function used within another function? Here is my problem: I am reconstructing a calculator for the burden of disease due to air pollution from publications and tools published by the WHO. The calculations make use of published dose-response relationships for particular health end-points. This is then applied to populations with known or

The announcement for Wine 1.1.12 says that support for subpixel font rendering has been added. The question is, how can we use it? Is there a way to enable it globally (there's no such setting in winecfg).

OggShell is a freeware Windows front-end for OggEnc. Suggestions and bug reports are welcome... Download page: http://www.gbg.bonet.se/stefant/oggshell/ Regards, Stefan Tobiasson <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only

Hello, I'm a newbie on this list. I have a R code but its execution take a very long time. Is it possible to compile it (in C for example) to decrease the execution time ? -- ---------------- Alexandre DEPIRE INRETS / GARIG

Hello, I'm a newbie on this list. I have a R code but its execution take a very long time. Is it possible to compile it (in C for example) to decrease the execution time ? -- ---------------- Alexandre DEPIRE INRETS / GARIG

W dniu 20.08.2015 o 13:26, Mauricio Tavares pisze: > On Aug 20, 2015 6:54 AM, "ken" <gebser at mousecar.com> wrote: >> >> One of the build options for a laptop I'm looking at buying is DVD vs > Blu-Ray. I've never used Blue-ray before, so is there some compelling > reason, as a Linux guy, to want to get Blu-ray? > First of all, is this going

Hi, I'm using dovecot 2.3.0 installed on a new CentOS 7.4 with rpm from Dovecot repo. When I use LMTP to deliver an email to an overquota user, lmtp service hangs with a segfault: Jan 17 13:39:45 server-02.example.com kernel: lmtp[5099]: segfault at 0 ip 0000563599e372c2 sp 00007ffeaa4fdc80 error 4 in lmtp[563599e31000+b000] Jan 17 13:39:45 server-02.example.com dovecot[5089]: lmtp(5099):