convert string formula to data dictionary
Returns : | vars : dictionary
names : list
|
---|
Notes
with sorted dict, separate name list wouldn’t be necessary
Examples
>>> xx, n = form2design('I a F:b P:c*d G:c*f', testdata)
>>> xx.keys()
['a', 'b', 'const', 'cf', 'cd']
>>> n
['const', 'a', 'b', 'cd', 'cf']