Solver inside of HP basic

[Thomas Ritschel]

(02-25-2015 02:04 PM)Tim Wessman Wrote:  Since this is just a plain numeric solving, just use the numeric solver command. FNROOT is what you are looking for. No other changes are needed in your first posted program.

By changing Jan's code into the following I get "Kepler Error: Bad Guess(es)":

Code:

EXPORT Kepler()
BEGIN
  LOCAL M=60, e=0.15, E;
  HAngle:=0;
  FNROOT(E-SIN(e)-M,E);
  PRINT(E);
  HAngle:=1;
END;

I also tried other variants, e.g. FNROOT('E-SIN(e)-M=0',E) or by providing some proper guess, but it keeps showing the error message. The problem may be caused by the use of local variables: By using the single letter HOME variables, e.g. by removing the LOCAL statement (and changing "e" into some other capital letter), the error message disappears. But then it's just printing "0" instead of the correct result...

BTW.: I'm using the latest (?) calculator software version 6975.