| assert_dim | R Documentation | 
Check Object Dimensions
assert_dim(x, expected)
assert_nrow(x, expected)
assert_ncol(x, expected)
| x | An object to be checked. | 
| expected | An appropriate expected value. | 
Throws an error, if any, and returns x invisibly otherwise.
N. Frerebeau
Other checking methods: 
assert_constant(),
assert_empty(),
assert_infinite(),
assert_length(),
assert_lower(),
assert_missing(),
assert_names(),
assert_numeric,
assert_package(),
assert_square(),
assert_type(),
assert_unique()
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