Create vector of characters from unquoted strings (variable names)
qc It is often needed to address variables in the data.frame in the such
manner: dfs[ , c("var1", "var2", "var3")]. qc ("quoted c") is a
shortcut for the such cases to reduce keystrokes. With qc you can write:
dfs[ , qc(var1, var2, var3)].
qe returns list of expression. It is useful to create substitution list for ..$arg.
text_expand is simple string interpolation function. It searches in its
arguments expressions in curly brackets {expr}, evaluate them and substitute with
the result of evaluation. See examples.
qc(...)
qe(...)
text_expand(..., delim = c("\\{", "\\}"))... |
characters in |
delim |
character vector of length 2 - pair of opening and closing
delimiters for the templating tags. By default it is curly brackets. Note
that |
Vector of characters
## qc
qc(a, b, c)
identical(qc(a, b, c), c("a", "b", "c"))
mtcars[, qc(am, mpg, gear)]
## text_expand
i = 1:5
text_expand("q{i}")
i = 1:3
j = 1:3
text_expand("q1_{i}_{j}")
data(iris)
text_expand("'iris' has {nrow(iris)} rows.")
## qe
qe(mrset(a1 %to% a6), mrset(b1 %to% b6), mrset(c1 %to% c6))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.