similar to: Memory management in R

now after this: df_both <- subset(df, grepl("t1", Command) & grepl("t2", Command)) I use factor to apply the subset to df but then the Command level becomes 0 df_both$Command=factor(df_both$Command) str(df_both) $ Protocol : Factor w/ 0 levels: Do you know what is the reason? Thanks for replying On Sunday, April 24, 2016 12:18 PM, jim

'grepl' returns a logical vector; you have to use this to get your subset. You can use: df_tq <- subset(df, grepl("t1", Command)) df_t2 <- subset(df, grepl("t2", Command)) # if you want to also get a subset that has both, use df_both <- subset(df, grepl("t1", Command) & grepl("t2", Command)) Jim Holtman Data Munger Guru What is

Hi all, I have one factor variable in my df and I want to extract the names from it which contain both "t2" and "pd": 'data.frame': 36919 obs. of 162 variables $TE :int 38,41,11,52,48,75,..... $TR :int 100,210,548,546,..... $Command :factor W/2229 levels

On 04/10/2016 03:27 PM, Fabien Tarrade wrote: > Hi Duncan, >> Didn't you post the same question yesterday? Perhaps nobody answered >> because your question is unanswerable. > sorry, I got a email that my message was waiting for approval and when I > look at the forum I didn't see my message and this is why I sent it > again and this time I did check that the

Thanks to all. Very helpful. Steven from iPhone > On Jan 14, 2023, at 3:08 PM, Andrew Simmons <akwsimmo at gmail.com> wrote: > > ?You'll want to use grep() or grepl(). By default, grep() uses extended > regular expressions to find matches, but you can also use perl regular > expressions and globbing (after converting to a regular expression). > For example: >

You'll want to use grep() or grepl(). By default, grep() uses extended regular expressions to find matches, but you can also use perl regular expressions and globbing (after converting to a regular expression). For example: grepl("^yr", colnames(mydata)) will tell you which 'colnames' start with "yr". If you'd rather you use globbing:

You can use the grepl() function to give you logicals for each criterion, then combine them as needed. For example: # example version of Command Command <- paste0("_localize_", c("PD","t2","t1_seq", "abc", "xyz", "PD_t1")) hasPD <- grepl("PD", Command, fixed=TRUE) hast1 <- grepl("t1", Command,

I do not follow you Gabriel. Package name must not use digit numbers. Tarbal will use them, taken from the DESCRIPTION file, version field. That's why I consider the weird case name you presented as irrelevant, and not to be considered. Le ven. 9 ao?t 2019 ? 20:41, Gabriel Becker <gabembecker at gmail.com> a ?crit : > > > On Fri, Aug 9, 2019 at 11:05 AM neonira Arinoem

Hola, Carlos. Primero, muchas gracias por el código. No es exactamente lo que quería, porque la parte "Detección de presencia de "cual_1" y "cual_2"... no excluye aquellas combinaciones en las que está presente también el objeto c, pero me ha servido de base e inspiración para elaborar otro código. He copiado la primera parte de tu función, para crear todas las

Thanks Jean, Does anyone know how to set these [hast1] and [hast2] as the colors of a plot? On Friday, April 22, 2016 7:39 AM, "Adams, Jean" <jvadams at usgs.gov> wrote: You can use the grepl() function to give you logicals for each criterion, then combine them as needed. For example: # example version of Command Command <- paste0("_localize_",

I thought that I can use metacharacters such as \w to match word characters with one backslash. But for some reason, I need to include two backslashes. > grepl(pattern='\w', x="what") Error: '\w' is an unrecognized escape in character string starting "\w" > grepl(pattern='\\w', x="what") [1] TRUE I can't find the reason for this

x["V2"] is more efficient than using drop=FALSE, and perfectly normal syntax (data frames are lists of columns). I would ignore the naysayers, or put a comment in if you want to accelerate their uptake. As I understand it, one of the main reasons tibbles exist is because of drop=TRUE. List-slice (single-dimension) indexing works equally well with both standard and tibble types of data

I doubt your actual file looks like the mess that made it to my email software (below) because you posted HTML-format email. Read the Posting Guide, and in particular figure out how to send plain text email. You might try the "anytime" contributed package, though I suspect it too will choke on your mess. Otherwise, that will pretty much leave only a brute-force series of regular

Buenas, A ver si alguien sabe como hacer lo siguiente: Tengo un df con letras y numeros, quiero que si me detecta un numero en concreto me a?ada dicho numero en otra columna. Algo asi df<-data.frame(c("AV 23","PEPE 34","QWE","AV 24","WERRR ER34","AV 25")) colnames(df)<-c("nombre1") df[grepl("AV

Thanks Jeff. This is a nice way of solving this problem. What about the cases with 0015-02-21?Many thanks.?Best,Farnoosh On Wednesday, June 28, 2017 10:49 PM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote: I doubt your actual file looks like the mess that made it to my email software (below) because you posted HTML-format email. Read the Posting Guide, and in particular

Hello R-helpers, I am trying to search for string that includes the caret symbol, using the following code: grepl("latitude^2",temp) And R doesn't like that. It gives me: > temp<-c("latitude^2","latitude and latitude^2","longitude^2","longitude and longitude^2") > temp [1] "latitude^2" "latitude and

Dear R Developer, It seems to be a problem with help file. Not sure if it is related to the new format of Rd parser. Multiple lines are joined together without proper line break. > ?mean There were 14 warnings (use warnings() to see them) ## All lines are joined together and not easy to read. > warnings() Warning messages: 1: In grepl("^[[:blank:]]*$", buffer[length(buffer)]) :

Okay. So, after having spent quite some time never really tracking down why my package NEWS files were unacceptable to readNEWS(), I noticed that there was recent (to me anyway) development that allowed the NEWS to be done as an Rd file. Sweet! A more standard format... I converted a NEWS file in one of my unreleased packages to Rd format. checkNEWS() gave it a thumbs up. But then it went south.

Inspired by this old Stack Overflow question https://stackoverflow.com/questions/19765610/when-does-locale-affect-rs-regular-expressions I was wondering why this is TRUE: Sys.setlocale("LC_ALL", "et_EE") grepl("[A-Z]", "T") TRE's documentation at <https://laurikari.net/tre/documentation/regex-syntax/> says that a range "is shorthand for

Dear r-devel list members, By placing a call to the new (with R 2.15.1) globalVariables() in the development version of the Rcmdr package, I've succeeded in reducing the "notes" produced by R CMD check from dozens to two. But I still get the following notes, even though '.commander.done' is in the call to globalVariables(): ------------- snip ------------ * checking R code