search for: r_basenamespac

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2014 Oct 17
1
Making parent.env<- an error for package namespaces and package imports
...=============================== --- src/main/builtin.c (revision 66783) +++ src/main/builtin.c (working copy) @@ -356,6 +356,24 @@ return( ENCLOS(arg) ); } +static Rboolean R_IsImportsEnv(SEXP env) +{ + if (isNull(env) || !isEnvironment(env)) + return FALSE; + if (ENCLOS(env) != R_BaseNamespace) + return FALSE; + SEXP name = getAttrib(env, R_NameSymbol); + if (!isString(name) || length(name) != 1) + return FALSE; + + const char *imports_prefix = "imports:"; + const char *name_string = CHAR(STRING_ELT(name, 0)); + if (!strncmp(name_string, imports_pr...
2023 Nov 15
1
saveRDS()/readRDS() on environments
Dear r-devel, I was surprised to see that saveRDS() and readRDS() work quite well with environments, see below: ``` z <- 3 # in global env y <- new.env() y$a <- 1 x <- new.env(parent = y) x$b <- 2 saveRDS(x, "x.RDS") # in a new session x <- readRDS("x.RDS") y <- parent.env(x) x$b #> [1] 2 y$a #> [1] 1 parent.env(y) #> <environment:
2009 Dec 16
2
What is the fastest way to see what are in an RData file?
Currently, I load the RData file then ls() and str(). But loading the file takes too long if the file is big. Most of the time, I only interested what the variables are in the the file and the attributes of the variables (like if it is a data.frame, matrix, what are the colnames/rownames, etc.) I'm wondering if there is any facility in R to help me avoid loading the whole file.