Check if a data object was created by qdata()
Data objects created by
qdata has a special token, which is
checked by this function. If the data object was not created by
it will be automatically converted (with a warning message).
- a data object
The data object created by
check_data(cbind(x = 1:5, y = 6:10)) check_data(head(mtcars)) check_data(qdata(head(mtcars)))
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