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+--- Thread: EIGENV in RPN mode (/thread-7454.html)
EIGENV in RPN mode - Jean-Michel - 12-22-2016 10:43 AM
Hello all
Sorry for bothering you with such a low level topic, but I can't find out how to use the EIGENV command (be it with a predefined M1 matrix, or a matrix listed in the command, or above in the stack) when in RPN mode, which is my default setting.
I just get "Syntax error" as a result.
No issue when in Textbook or Algebraic mode.
Is it me or is this kind of command not compatible with RPN? This may have been discussed already but I just don't have much time to dig into the archives right now.
Many thanks Advanced and kind regards.
RE: EIGENV in RPN mode - Didier Lachieze - 12-22-2016 10:56 AM
In RPN put your matrix on the stack and then call EIGENVAL with the number of parameters to take from the stack (this syntax is specific to RPN mode).
For ex:
- M1 EIGENVAL(1)
- 'M1' ENTER EIGENVAL(1)
- [[1 2][3 4]] ENTER EIGENVAL(1)
RE: EIGENV in RPN mode - Jean-Michel - 12-22-2016 10:58 AM
Thanks!
RE: EIGENV in RPN mode - Jean-Michel - 12-22-2016 12:47 PM
I was in a hurry last time and did not took the time to post this additional question: since this is not documented in the help text that can be accessed from the calculator (which is to my opinion a lacuna), where did you get this information?
I have had a quick look at the User's Manual (issue July 2015) in the chapter dedicated to RPN and did not find anything similar.
Kind regards.
[EDIT] : I have found it in the RPN chapter. Just needed to read more carefully.