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Evaluate R expressions and substitute their values into one or more strings.
es(text, round = NULL, signif = NULL, envir = parent.frame())The final strings, with expression values substituted into them.
A vector of strings to substitute into.
NULL or a single integer, giving the number of decimal
digits for rounding numeric expressions. This argument takes priority over
signif.
NULL or a single integer, giving the number of
significant decimal digits to use for numeric expressions. The
round argument takes priority over this one, and will be used if
not NULL.
The environment to evaluate expressions in.
Each part of the string surrounded by "#{}" is extracted, evaluated
as R code in the specified environment, and then its value is substituted
back into the string. The literal string "#{}" can be obtained by
escaping the hash character, viz. "\\#{}". The block may contain
multiple R expressions, separated by semicolons, but may not contain
additional braces. Its value will be coerced to character mode, and if the
result has multiple elements then the source string will be duplicated.
ore_subst
es("pi is #{pi}")
es("pi is \\#{pi}")
es("The square-root of pi is approximately #{sqrt(pi)}", signif=4)
es("1/(1+x) for x=3 is #{x <- 3; 1/(1+x)}")
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