On Tue, May 18, 2010 at 18:06, milton ruser <milton.ruser@gmail.com> wrote:

> Hi Martin,
>
> thanks for your reply, and very thanks for your kind tips about "package"
> and "library"
> So, I was trying to understand *why* we load packages using library().
>

I've started to use and suggest using   require(.) instead
{as my efforts to introduce  use() or usePackage() *and* deprecating
 library()  where met with strong opposition}


> I suggest that developers killl the problem on its root, deleting library
> function :-)
> Good to know already installed packages will not be reinstalled.
>
> cheers
>
> milton
>
> On Tue, May 18, 2010 at 12:49 PM, Martin Maechler <
> maechler@stat.math.ethz.ch> wrote:
>
>> { I've modified the subject; I can't stand it hitting square into
>>  my face ... }
>>
>> >>>>> "mr" == milton ruser <milton.ruser@gmail.com>
>> >>>>>     on Tue, 18 May 2010 12:36:23 -0300 writes:
>>
>>    mr> Dear R-experts,
>>    mr> I am installing new libraries using
>>    mr> install.packages("ggplot2",dependencies=T).
>>    mr> But I perceive that many dependencies are already installed. As I
>> am using
>>    mr> a low-band internet, how can avoid reinstall installed libraries?
>>
>> There's no problem with installed libraries, as ...
>> they DO NOT EXIST.
>>
>> These are *PACKAGES* !
>> Why do you think are you talking about the function
>>
>>  install.packages()  ????
>>         ^^^^^^^^
>>
>> ---
>> To answer the question you did want to ask:
>>
>> Do not be afraid:  Depedencies are only installed when needed,
>> i.e., no package will be downloaded and installed if it already
>> is there.
>>
>> Martin Maechler, ETH Zurich
>>
>>    mr> cheers
>>
>>    mr> milton
>>
>>    mr> [[alternative HTML version deleted]]
>>        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> (another thing you should learn to avoid, please)
>>
>>
>

	[[alternative HTML version deleted]]

