Thanks. On 9/15/07, Bruce Momjian <[EMAIL PROTECTED]> wrote: > > > Change made. Thanks. Your documentation changes can be viewed in five > minutes using links on the developer's page, > http://www.postgresql.org/developer/testing. > > > --------------------------------------------------------------------------- > > > Andrew Maclean wrote: > > In Table 9.4 of the documentation atan2 is described as follows: > > atan2(*x*, *y*) inverse tangent of *x*/*y* > > > > I am sure it should read as: > > atan2(*y*, x) inverse tangent of y/x > > > > This looks to be the standard C++/c atan2(y,x) function. > > > > You can easily test this: > > If y = 2, x = 1, then degrees(atan(y/x)) =63.4 but if we proceed > according > > to the documentation; degrees(atan2(x,y))=degrees(atan2(1,2))=25.6 which > is > > not the same as degrees(atan(y/x)). > > So it must be degrees(atan2(y,x))=degrees(atan2(2,1))=63.4. > > > > > > Thanks > > Andrew > > > > -- > > ___________________________________________ > > Andrew J. P. Maclean > > Centre for Autonomous Systems > > The Rose Street Building J04 > > The University of Sydney 2006 NSW > > AUSTRALIA > > Ph: +61 2 9351 3283 > > Fax: +61 2 9351 7474 > > URL: http://www.acfr.usyd.edu.au/ > > ___________________________________________ > > -- > Bruce Momjian <[EMAIL PROTECTED]> http://momjian.us > EnterpriseDB http://www.enterprisedb.com > > + If your life is a hard drive, Christ can be your backup. + > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Have you searched our list archives? > > http://archives.postgresql.org/ >
-- ___________________________________________ Andrew J. P. Maclean Centre for Autonomous Systems The Rose Street Building J04 The University of Sydney 2006 NSW AUSTRALIA Ph: +61 2 9351 3283 Fax: +61 2 9351 7474 URL: http://www.acfr.usyd.edu.au/ ___________________________________________
