expr_creates_var {swirl} | R Documentation |
Test that a new variable has been created.
Description
Tests if the e$expr
creates one new variable (of correct name
if given.) If so, returns TRUE
.
Usage
expr_creates_var(correctName = NULL)
Arguments
correctName |
expected name of the new variable or |
Value
TRUE
or FALSE
See Also
Other AnswerTests:
AnswerTests
,
any_of_exprs()
,
calculates_same_value()
,
expr_identical_to()
,
expr_is_a()
,
expr_uses_func()
,
func_of_newvar_equals()
,
omnitest()
,
val_has_length()
,
val_matches()
,
var_is_a()
Examples
## Not run:
# Test if the user has entered an expression which creates
# a new variable of any name.
expr_creates_var()
#
# Test if the user has entered an expression which creates
# a variable named 'myNum'
#
expr_creates_var('myNum')
## End(Not run)
[Package swirl version 2.4.5 Index]