Erik Iverson wrote:
Depending on the class, you might have another teaching opportunity.
.... right away after showing your students that (and why) x + 1 - x = 0
Example:
x <- 10^20
x + 1 - x
Uwe Ligges
See R FAQ 7.31 and the document it points to.
Adrian Teo wrote:
I was working on a teaching example, but came across this weird result:
q<-c(1.6,2.6, -3.4)
q
[1] 1.6 2.6 -3.4
sum(q)
[1] 0.8
sum(q)- 0.8
[1] 2.22044605e-16
Why is the result not precisely zero?
Thanks!
AT
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and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
