[R] [FORGED] if and

[Jeff Newmiller]

Really? That seems unlikely, given that

* = is used for moving values, not comparing them,

* - is not a legal symbol for a variable name, it is subtraction, and year-month can hardly end up as a character string like "FEB2015"

* (possible problem) & and | compare vectors one at a time, so are not generally recommended for use in "if", but are more commonly used in the "ifelse" function. 

These points are all discussed in the Introduction to R document that comes with R.
-- 
Sent from my phone. Please excuse my brevity.

On February 27, 2017 7:02:29 PM PST, Val <valkremk at gmail.com> wrote:
>Thank you  Rolf and Bert!
>
>I found the problem and this
>
>if(country="USA" & year-month = "FEB2015" | "FEB2012" ){
>        has be changed  to  this
>if(country="USA" & year-month == "FEB2015" | year-month == "FEB2012" ){
>
>On Mon, Feb 27, 2017 at 8:45 PM, Bert Gunter <bgunter.4567 at gmail.com>
>wrote:
>
>> I note that you have "Year-month" (capital 'Y') and "year-month" in
>> your code; case matters in R.
>>
>> Otherwise, Rolf's advice applies.
>>
>> Cheers,
>> Bert
>>
>> Bert Gunter
>>
>> "The trouble with having an open mind is that people keep coming
>along
>> and sticking things into it."
>> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>>
>>
>> On Mon, Feb 27, 2017 at 6:16 PM, Rolf Turner
><r.turner at auckland.ac.nz>
>> wrote:
>> > On 28/02/17 14:47, Val wrote:
>> >>
>> >> Currently I have  about  six or more  scripts that do the same
>job.  I
>> >> thought it might be possible and more efficient to use one script
>by
>> using
>> >> IF ELSE statements. Here is an example but this will be expandable
>for
>> >> several countries ans year-months
>> >>
>> >>
>> >> Year-month = FEB2015, FEB2012,  Feb2010
>> >>  country  = USA, CAN.MEX
>> >> First I want to do if country = USA and year-month = FEB2015,
>FEB2012 do
>> >> the statements
>> >> second if country = CAN and year-month =Feb2010 do  the statements
>> >>
>> >>
>> >> if(country="USA" & year-month = "FEB2015" | "FEB2012" ){
>> >> statemnt1
>> >> .
>> >> statemnt10
>> >>
>> >> } else if (country="USA" & year-month ="FEB2015") {
>> >> statemnt1
>> >> .
>> >> statemnt10
>> >> }
>> >>
>> >> else
>> >> {
>> >> statemnt1
>> >> .
>> >> statemnt10
>> >> }
>> >>
>> >> The above script did not work. is there a different ways of doing
>it?
>> >
>> >
>> > Uh, yes.  Get the syntax right.  Use R, when you are using R.
>> >
>> > Looking at ?Syntax and ?Logic might help you a bit.
>> >
>> > Other than that, there's not much that one can say without seeing a
>> > reproducible example.  And if you sat down and wrote out a
>*reproducible
>> > example*, using correct R syntax, you probably wouldn't need any
>> assistance
>> > from R-help.
>> >
>> > Have you read any of the readily available R tutorials?  If not do
>so. If
>> > so, read them again and actually take note of what they say!
>> >
>> > cheers,
>> >
>> > Rolf Turner
>> >
>> > --
>> > Technical Editor ANZJS
>> > Department of Statistics
>> > University of Auckland
>> > Phone: +64-9-373-7599 ext. 88276
>> >
>> >
>> > ______________________________________________
>> > R-help at 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.
>>
>
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>
>______________________________________________
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