function data() {
	var d = readJSON( fpath, opts );
	if ( d instanceof Error ) {
		throw d;
	}
	return d;
}
Returns Anscombe's quartet.

## Notes

-   This function synchronously reads data from disk for each invocation. Such behavior is intentional and so is the avoidance of `require`. We assume that invocations are infrequent, and we want to avoid the `require` cache. This means that we allow data to be garbage collected and a user is responsible for explicitly caching data.

@throws {Error} unable to read data
@returns {ArrayArray} Anscombe's quartet

@example
var d = data();
// returns [[[10,8.04],...],[[10,9.14],...],[[10,7.46],...],[[8,6.58],...]]