Re: From object name strings to objects

Às 11:48 de 19/05/2026, Naresh Gurbuxani escreveu:
> 
> I want to stack several dataframes using their names as strings.
> 
> df1 <- data.frame(name = "normal", x = rnorm(5))
> df2 <- data.frame(name = "uniform", x = runif(5))
> df3 <- data.frame(name = "binomial", x = rbinom(5, 2, 0.5))
> mynames <- c("df1", "df2", "df3")
> 
> newdf <- some_function(mynames)
> 
> # Desired result
> newdf <- do.call(rbind, list(df1, df2, df3))
> 
> How can this be done?
> 
> Thanks,
> Naresh
> 
> ______________________________________________
> [email protected] mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Hello,

Something like this?



fun <- function(df_names, pattern, envir = .GlobalEnv) {
   if(missing(df_names)) {
     if(missing(pattern)) {
       obj_names <- ls(envir = envir)
       df_list <- Filter(\(x) is(x, "data.frame"), mget(obj_names, envir 
= envir))
     } else {
       df_names <- ls(pattern = pattern, envir = envir)
       df_list <- mget(df_names, envir = envir)
     }
   } else df_list <- mget(df_names, envir = envir)
   res <- do.call(rbind, df_list)
   row.names(res) <- NULL
   res
}

df1 <- data.frame(name = "normal", x = rnorm(5))
df2 <- data.frame(name = "uniform", x = runif(5))
df3 <- data.frame(name = "binomial", x = rbinom(5, 2, 0.5))
mynames <- c("df1", "df2", "df3")

fun()
fun(mynames)
fun(pattern = "df")


Hope this helps,

Rui Barradas