[R] Multiplying two vectors of the same size to give a third vector of the same size

[Philip Rhoades]

Bert,


On 2023-06-21 03:31, Bert Gunter wrote:
> IMO:
> You need to do your due diligence. This list is not meant to serve as
> a substitute for learning the basics of R, which you have clearly not
> done. Please go through an R tutorial or two (there is even one that
> ships with R, "An Inroduction to R") before posting further here.
> There are many good ones online, of course. Here is one compendium,
> but a simple search will find many more:
> 
> https://support.posit.co/hc/en-us/articles/200552336-Getting-Help-with-R


It has been a long time since I looked at R and I thought at least my 
second Q was something reasonable to ask the list?

Anyway now that I need to use R again, the basics should come back to me 
I hope - but I will check out the tutorials again in any case . .

Thanks to Uwe as well (very nice!),

Phil.
> On Tue, Jun 20, 2023 at 8:38 AM Philip Rhoades via R-help
> <r-help using r-project.org> wrote:
> 
>> People,
>> 
>> I am assuming that what I want to do is easier in R than say Ruby.
>> 
>> I want to do what the Subject says ie multiply the cells in the same
>> 
>> position of two vectors (A and B) to give a result in the same
>> position
>> in a third vector (C) BUT:
>> 
>> - The values in the cells of A and B are floats between 0.0 and 1.0
>> or
>> NULL
>> 
>> - If there is a NULL in the multiplication, then the result in the
>> cell
>> for C is also a NULL
>> 
>> - If there is a value less than (say) 0.01 in the multiplication,
>> then
>> the result in the cell for C is 0.0
>> 
>> Any suggestions appreciated!
>> 
>> Phil.
>> 
>> --
>> Philip Rhoades
>> 
>> PO Box 896
>> Cowra  NSW  2794
>> Australia
>> E-mail:  phil using pricom.com.au
>> 
>> ______________________________________________
>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.

-- 
Philip Rhoades

PO Box 896
Cowra  NSW  2794
Australia
E-mail:  phil using pricom.com.au