Replacing MyDOWEffect with TransformedRandomVariable in day of the week tutorial

[gvegayon]

Looks good. I think we just want to wait for #387 so we can avoid having to define MyDOWEffect.

We could also merge as is and address that later. Your call @gvegayon.

I'll wait

Originally posted by @gvegayon in #344 (comment)

[gvegayon]

I am replacing my personalized RV in the day-of-the-week tutorial with a TransformedRandomVariable, and I see one issue: The option to record the transformed variable is accessible during the sample call. I think this should be changed to specify the record parameter during construction instead. Otherwise, following the current implementation, I would have to modify the body of the sample function of the latent.HospitalAdmissions RV to record the transformed variable.

attn @damonbayer @dylanhmorris

[damonbayer]

I agree that record should be specified at construction.

[damonbayer]

On further reflection, I think we could do away with record and have optional names. If there is no name, the variable is not recorded. If a same is provided, the RandomVariable is always recorded. This avoids any scenario where a name is supplied but not used.

[dylanhmorris]

I think this is an intriguing proposal but deserves its own issue for discussion.

[gvegayon]

For the moment, in the PR attached to this issue, I will pass record = True to latent.HospitalAdmissions.