Le jeudi 21 janvier 2010 à 17:50 -0800, RLa a écrit : > Have a good evening, > > As an astronomer, I need to enter coordinates in the classical sexagesimal > format using degrees (0 to 360 with 1/60 and 1/3600 divisions) or angle > hours (0 to 24 with 1/60 and 1/3600 divisions, that's right ascension). > Using "time" format with "[HH]:mm:ss" is OK, until one has to use > trigonometric functions to perform spherical trigonometry... then you have > to multiply by 180/pi() or 12/pi() in each call to a trigonometric function, > and not to get confused between declination (180/pi) and right ascension > (12/pi)! > > Would it be possible to define a new data type via plugins (angles using > radians internally, but displaying something else via formats, like dates > that are represented internally like an offseted Julian Day) like one > defines functions?
You can't define such units, but you migth define trigonometric functions using degrees as intput (or output). Regards, Jean _______________________________________________ gnumeric-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/gnumeric-list
