Description Usage Arguments Value Examples
Create a URL S3 object
check if URL object
conver as.character() string from of object to URL object
conver string form of object to URL object
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | URL(url, base = paste0("file://", getwd()), src = NULL, id = NULL,
meta = c(), classes = NULL, ...)
is.URL(x)
as.URL(x, ...)
## Default S3 method:
as.URL(x, ...)
## S3 method for class 'list'
as.URL(x, ...)
## S3 method for class 'URL'
as.character(x, ...)
as.URL_row(x, ...)
## Default S3 method:
as.URL_row(x, ...)
|
url |
string url rapresentation |
base |
a base url for relative urls (string or URL) |
src |
an URL object fron which this object is derived |
id |
entry id (taken from named list/array) |
meta |
an optional array of meta attributes |
classes |
extra classes to include (between schema and id) |
... |
other arguments passed to specific methods |
x |
an arbitrary object or an object of S3 class URL |
an URL object
check condition
an URL object
an named list of data.frame columns
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | # simple scalar construction
u <- URL('http://www.w3c.org')
as.character(u)
print(u)
## Not run:
str(u)
## End(Not run)
# "derived" URL
u2 <- URL('http://ietf.org', ,src='http://www.w3c.org')
as.character(u2)
as.character(u2$src)
# default schema ('file://') with defaults
s1 <- URL('/etc/R/Renvironment')
s2 <- URL('hosts',base='/etc')
s3 <- URL('.Rhistory')
s4 <- URL('~/.Rprofile')
s5 <- URL('.Rprofile', base='~')
sapply(list(s1,s2,s3,s4,s5), as.character)
# construction from a (named) character vector and data.frame cast
l <- c(
w3c='http://www.w3c.org',
ietf='http://ietf.org',
iana='http://www.iana.org',
hosts='hosts',
'R env'='/etc/R/Renviron'
)
uz <- URL(l, src=URL('https://cran.r-project.org/'), base='/etc')
df <- as.data.frame(as.URL_list(uz))
head(df,nrow(df))
|
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