>>>>> "Jari" == Jari Oksanen <[EMAIL PROTECTED]>
>>>>> on 01 Jun 2004 12:44:09 +0300 writes:
Jari> On Tue, 2004-06-01 at 12:21, Torsten Steuernagel wrote:
>> On 28 May 2004 at 8:19, Duncan Murdoch wrote:
>>
>> > I'd advise against doing this kind of optimization. It will make your
>> > code harder to maintain, and while it might be faster today, if "@<-"
>> > is really a major time sink, it's an obvious candidate for
>> > optimization in R, e.g. by making it .Internal or .Primitive. When
>> > that happens, your "optimized" code will likely be slower (if it even
>> > works at all).
>>
>> Agreed. I don't recommend doing this either. I don't believe it makes
>> any difference using "slot<-" instead of "@<-" in real life. Anyway, that
>> "optimized" code should always work (slower or not) because "slot<-"
>> is fully documented and I don't see why it should be removed or its
>> behaviour should change. That wouldn't only break the kind of code
>> mentioned here but also everything else that makes use of "slot<-".
>>
Jari> There are several other things that were fully
Jari> documented and still were removed. One of the latest
Jari> cases was print.coefmat which was abruptly made
Jari> Defunct without warning or grace period:
Jari> code written for 1.8* didn't work in 1.9.0 and if
Jari> corrected for 1.9.0 it wouldn't work in pre-1.9.0.
that's wrong.
In 1.8.* every use of print.coefmat() would give a warning,
e.g.,
> print.coefmat(cmat)
Estimate Std.Err Z value Pr(>z)
[1,] 10.2645 3.6570 2.8068 0.005004 **
[2,] 8.6213 3.0335 2.8420 0.004483 **
[3,] 11.8762 1.9379 6.1284 8.875e-10 ***
---
Signif. codes: 0 `***' 0.001 `**' 0.01 `*' 0.05 `.' 0.1 ` ' 1
Warning message:
'print.coefmat' is deprecated.
Use 'printCoefmat' instead.
See ?Deprecated.
which tells you what to use instead.
So there was a 6-month "grace period" (and that's the rule: one
cycle of 'deprecated' before 'defunct').
And as Roger Bivand just mentioned: You could have gotten that
warning even considerably earlier -- when 1.8.0 was R-devel,
all CRAN packages using print.coefmat() -- in code that is
executed in the package examples or 'tests --- had been listed as
giving warnings on the CRAN package check page
{from CRAN main page --> sidebar[Packages] has a section
'Daily package check results'}
Jari> Anything can change in R without warning,
Jari> and your code may be broken anytime. Just be prepared.
I can understand your feelings, but your statement
is quite a bit exaggerated, see above.
Martin
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