dot-check_validity: Checks validity of the argument passed to d3Venn
In thothal/d3Venn: Venn.js Widget

Description Usage Arguments Value Note

The sanity checks for d3Venn are outsourced to this function for cleaner code.

1	.check_validity(sets)

sets

object, will be checked if it fits the requirments of d3Venn

A list with the follwing elements:

result boolean, TRUE if the object is a valid object, FALSE otherwise.
msg character, the error / warning message to be returned.
severity character, either “warning” or “error”. Indicates if the problem found should raise an error or a warning severity will be called with the given msg from the calling function.
fixed data.frame, in case the problem can be fixed by removing elements from sets, fixed will contain this fixed version.

Not all logical errors will be covered here for simplicity. For instance missing lower order intersections and or size restrictions on lower order intersections are not checked. Rational behind this is that we want to make sure that there is at least a plot, even if it is not as intended. We add some more tests than strictly necessary for this goal becasue they were rather easy to implement. The rest is left to the user to investigate further. A close look into the JS console reveals if there were erros during the rendering.

The following issues are checked: