[BioC] new CDF env from combineAffyBatch is not recognized

[Seth Falcon]

lgautier at altern.org writes:

>>
>> Now, for everybody, it seems (at least on my side) that cdfName() can only
>> get the name of environment associated with the affybatch, and cannot set
>> it.
>
> That will be the case whenever the accessor function doing the assignment
> has not been defined.
> cdfName() does return something because the function that 'gets' the value
> has been defined (and for this particular class), while the function that
> 'sets' a value has not.
>
> I suspect that this was done to prevent beginners from accidentally
> changing this (but as you note it, it can cause trouble to people that
> do want to change it as well).
>
>> I've set it with :
>> rawdata.p6p15 at cdfName <- "hgu133aa2cdf"
>>
>
> This way, you are accessing directly the attribute (or slot) called cdfName
> (using the "@" operator, that could also be done by calling the function "@":
> "@"(rawdata.p6p15, "cdfName", "hgu133aa2cdf")
> "@"(rawdata.p6p15, "cdfName")
> ), and since the function "@" can 'get' and 'set'
> you are free to assign a value to the slot.

If there is a reasonable use-case for setting the CDF name, let's
add a cdfName<- method and discourage use of '@'.

+ seth