R: 'findVarsInExpression'
findVarsInExpression | R Documentation |
findVarsInExpression
Description
parses expressions and returns the variables
Usage
findVarsInExpression(EXPR)
Arguments
EXPR |
a call object representing an R expression
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Details
findVarsInExpression takes a call and returns the names. It is used in gmReadInternal for parsing an R expression of an SQL query for variables.
Value
A string consisting of the variables.
Author(s)
K. Gerald van den Boogaart, S. Matos Camacho
See Also
replaceVarsInExpression , gmReadInternal
Examples
a <- quote( A==B^C+A^2+C )
findVarsInExpression(a)
Results
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