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+--- Thread: (38G) 40G: Matrix Power Programme (/thread-3359.html)
(38G) 40G: Matrix Power Programme - Gerald H - 03-13-2015 06:11 PM
Edit: Amended to include negative powers.
Edit: Programme slightly more elegant.
Edit: Amended to avoid errors for some powers > 5*10^11.
A lack in the 38G & 40G (not the 40gs) is the inability to find integer powers ≠ 2 or -1 of matrices.
This programme supplies the lack.
Store the matrix to power in M1, enter the integer power on the stack in HOME view & activate the programme.
The powered matrix is recalled as Ans in HOME view & is also stored in M2.
M1 remains unchanged.
Code:
Ans►N:
IFTE(N<0,INVERSE(M1),M1)►M3:
ABS(N)►N:
SIZE(M1):
IDENMAT(Ans(1))►M2:
WHILE N
REPEAT
IF
N MOD 2
THEN
M3*M2►M2:
N-1►N:
END:
M3^2►M3:
N/2►N:
END:
M2:RE: HP 38G & 40G: Matrix Power Programme - Francois Lanciault - 03-15-2015 04:45 AM
Thank you Gerald for these programs. Programs for these calculators are few and far between.
François
RE: HP 38G & 40G: Matrix Power Programme - Gerald H - 03-20-2015 12:58 PM
(03-15-2015 04:45 AM)Francois Lanciault Wrote: Thank you Gerald for these programs. Programs for these calculators are few and far between.
François
Thanks for the recognition.
It would be nice if others published their programmes.
RE: HP 38G & 40G: Matrix Power (New - Includes Negative Powers) Programme - Gerald H - 03-24-2015 08:05 AM
Just to advise of the latest edit to include negative powers.
RE: HP 38G & 40G: Matrix Power (New - Includes Negative Powers) Programme - Eddie W. Shore - 03-30-2015 01:35 PM
Much gratitude, Gerald.
RE: HP 38G & 40G: Matrix Power Programme - Gerald H - 05-18-2016 10:08 AM
Just to advise of latest edit, avoiding errors for some powers > 5*10^11.