[R] atan2(1,1i)

Robin Hankin r.hankin at noc.soton.ac.uk
Tue Mar 28 16:12:46 CEST 2006


?atan2 says that atan2(y,x)=atan(y/x) for x and y numeric or complex  

Well, I would expect atan2(1,1i) to be equal to atan(-1i), but

 > atan2(1,1i)
Error in atan2(y, x) : Non-numeric argument to mathematical function
 > R.version
platform       powerpc-apple-darwin8.5.0
arch           powerpc
os             darwin8.5.0
system         powerpc, darwin8.5.0
status         alpha
major          2
minor          3.0
year           2006
month          03
day            27
svn rev        37590
language       R
version.string Version 2.3.0 alpha (2006-03-27 r37590)

Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743

More information about the R-help mailing list