On Apr 28, 2012, at 9:54 AM, Jonsson wrote:
This code bellow will calculate average daily wind
speed(measurements are
taken every three hours).
snipped overly complex code not needed to address the semantic error
below.
the values are measured in kelvin so i want to convert them to
degree,therefor I want to subtract all values by 273.15 before
talking the
average or max.... but did not work.In other words, i want this:
every value
is subtracted by 273.15 first ,then do other calculations(Min, Max)Can
anyone tell me what is wrong.Thanks
tm[ta[i],tb[i]]= round(10 * mean(D[((d-1)*8 + 1:8)-273.15), i])) #
wrong
You should not be subtracting the temperature offset within the index
if your goal was to subtract the same number from each value in a
matrix. Move it outside the index/extract function. You didn't get an
error from "[" because it automatically truncated the floating point
numbers you were passingwhich should have been integer vectors.
tm[ta[i],tb[i]]= round(10 * mean(D[((d-1)*8 + 1:8)-273.15),
i]-273.15))
(No effort made to check for the sensibility of the assignment to the
'tm' matrix.)
Note:
c(1,2)[2.5]
#[1] 2 No error .... or even a warning.
--
View this message in context:
http://r.789695.n4.nabble.com/Min-Max-tp4593065p4594774.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________
R-help@r-project.org mailing list
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.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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.
