similar to: How to import specific column(s) using "read.table"?

I have a very large tab-delimited file, too big to store in memory via readLines() or read.delim(). Turns out I only need a few hundred of those lines to be read in. If it were not so large, I could read the entire file in and "grep" the lines I need. For such a large file; many calls to read.delim() with incrementing "skip" and "nrows" parameters, followed by grep()

The new code is dedicated to calculate free inodes number of all inode_allocs, then return the info to userpace in terms of an array. Specially, flag 'OCFS2_INFO_FL_NON_COHERENT', manipulated by '--cluster-coherent' from userspace, is now going to be involved. setting the flag on means no cluster coherency considered, usually, userspace tools choose none-coherency strategy by

Dear All, I have a data frame with n columns: X1, X2, ., Xn. Now I want to create a new column: if X1 = X2 = . = Xn, the value is 1; Otherwise, the value is 0. How to do that in a quick way instead of doing (n choose 2) comparisons? Thank you, Frank [[alternative HTML version deleted]]

Linux 3.11 added respective support, so I think we should follow suit. 1: xen: add LZ4 decompression support 2: libxc: add LZ4 decompression support Signed-off-by: Jan Beulich <jbeulich@suse.com>

Colleagues, I am using R 2.4.0 on both a Mac (10.4.8) and Linux (RedHat 9). To read data from an Excel spreadsheet, I do "save as" in Excel, then select the "Text (tab-delimited)" format. The resulting file uses a tab separator and I can usually read the file using read.delim. Sometimes, the header row contains embedded carriage returns. When I view the file,

Hi, I have a large table in Postgresql (result of an MCMC simulation, with 1 million rows) and I would like to retrive colums (correspond to variables) using RODBC. I have a column called "index" which is used to order rows. Unfortunately, sqlQuery can't return all the values from a column at once (RODBC complains about lack of memory). So I am using the following code:

I am getting an error when trying to import tab delimited .txt file saved from Excel. I have read what is posted on the forums but still am confused. I saved my Excel file (DataTestforR.xlsx) as a tab delimited txt file (DataTestR.txt) on my Desktop. In the RGUI, I tried to import the txt file and got an error > myfile<-"C:\\Users\\jpapa\\Desktop\\DataTestR.txt" >

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

Hi, I recieved an ascii file, containing following information: $$ Experiment Number: $$ Associated Data: FUNCTION 1 Scan 1 Retention Time 0.017 399.8112 184 399.8742 0 399.9372 152 .... Scan 2 Retention Time 0.021 399.8112 181 399.8742 1 399.9372 153 ..... I would like to import this data in R into a dataframe, where there is a column time, the first numbers as column names, and the

Hello, I read in a tab delimited text file via mydata = read.delim(myfile). The text file was originally an excel file where . was used in place of 0. Now all the columns which should be integers are factors. Any ideas how to change all the . to 0 and factors back to integer? Thanks a lot in advance for any suggestions, -- D --------------------------------- [[alternative HTML

Hi Bert, I am sorry to bother you on weekend. I am still struggling on defining a correct function. I first defined the function RFS (see below), then run it by provide the two argument. m52.2cluster <-RFS(inputfile =allinfo_m52, N=2 ) I do not get error message, but no figure displays on screen. I do not know what is going on. Can you help me a little more on this issue? Thank you,

Hi, Until now, I thought that the results of glm() and bigglm() would coincide. Probably a naive assumption? Anyways, I've been using bigglm() on some datasets I have available. One of the sets has >15M observations. I have 3 continuous predictors (A, B, C) and a binary outcome (Y). And tried the following: m1 <- bigglm(Y~A+B+C, family=binomial(), data=dataset1, chunksize=10e6)

Hi Richard, Thank you so much!! I understand the problem now, I assign a name to the "ggsurvplot" object and then add print(fig) at bottom of function definition, now figure gets printed on screen. Ding # function to generate RFS curves RFS <- function( inputfile, N ) { cluster<- survfit(Surv(RFS_days2, OV_Had_a_Recurrence_CODE) ~ clusters, data =

FAQ 7.22 You must print a ggplot object, for example with print(m52.2cluster) For the FAQ, run the line system.file("../../doc/FAQ") in R on your computer. Open up the resulting filepath in your favorite editor and scroll down to 7.22 On Sun, Jan 14, 2018 at 4:21 PM, Ding, Yuan Chun <ycding at coh.org> wrote: > Hi Bert, > > I am sorry to bother you on weekend. >

I am trying to import a permanent SAS data set using read.ssd in the foreign library. I get the following error: > list.files("C:/temp") [1] "newdat1.sas7bdat" "snpm1.sas7bdat" "test1.sas" > library(foreign) > newdat1 <- read.ssd("C:/temp","newdat1") SAS failed. SAS program at

Hi, I'm new to R, and I'm not a statistician (stunned silence). I am trying to do the following: 1. read in a 2-column data file, e.g. status new db green title "Most Significant Excursions" 2. end up with an R list such that I can write e.g. lst$title and have R return "Most Significant Excursions". I know I could do this by coding lst = list(title="Most

That is certainly OK, but you can also just use print(ggsurvplot(...)) as your final statement. out <- RFS( ...) would then return the ggsurvplot object *and* graph it. Any good R tutorial or a web search will provide more details on function returns, which you might find useful. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and

Accelerated msix entry is initialized to zero when msixtbl_pt_register is called. This doesn''t match the value from qemu side, although pirq may already be mapped and binded in qemu side. Kernel will get wrong value when reading msix info. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Tested-by: Yuval Shaia <yuval.shaia@oracle.com> --- tools/libxc/xc_domain.c

Thank you, your suggestion is simpler and logically better. I had impression that the last object in a function gets returned, so I did not add the print function at the bottom line of the function definition. Returning an object and graph the object are different process, I am a beginner for writing R function and need to find a good guide source about writing R functions. If you know a good

Hello, I'm simply trying to import a .txt file that has a column of about 30,000 pts. I found the file, but I'm getting an error: > m <- read.table(choose.files()) Error in "row.names<-.data.frame"(`*tmp*`, value = row.names) : duplicate row.names are not allowed Any help with getting around this? I really appreciate all the help. Thanks dave