deparse {base}

R Documentation

Expression Deparsing

Description

Turn unevaluated expressions into character strings.

Usage

deparse(expr, width.cutoff = 60)

Arguments

expr	any R expression.
width.cutoff	integer in [20, 500] determining the cutoff at which line-breaking is tried.

Details

This function turns unevaluated expressions (where “expression” is taken in a wider sense than the strict concept of a vector of mode "expression" used in expression) into character strings (a kind of inverse parse).

A typical use of this is to create informative labels for data sets and plots. The example shows a simple use of this facility. It uses the functions deparse and substitute to create labels for a plot which are character string versions of the actual arguments to the function myplot.

See Also

substitute, parse, expression.

Examples

deparse(args(lm))
deparse(args(lm), width = 100)
myplot <-
function(x, y)
    plot(x, y, xlab=deparse(substitute(x)),
        ylab=deparse(substitute(y)))

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