consistent params for timecorr

[lucywowen]

For some parameters (rfun) you pass a string, but for other paramters (cfun, combine, weights_fun, etc.) you pass a function. Should we discuss this?

[jeremymanning]

hmm...yes, we should probably discuss this...

ideally we could support either strings or functions for each thing. one approach might be to have a dictionary whose keys are the string names of functions and whose values are functions. then if the user passes a string, we could convert it to the associated function by looking up that key's value in the dictionary.

proposed plan:

1. i'm happy to discuss; let me know if/when you'd like to do that
2. i'm ok with proceeding with the current API if it's functional, and then keeping this issue open to deal with in a future release

[jeremymanning]

status of this? should we deal with this in a future release? @lucywowen