(38G) 40G: Matrix Power Programme - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Software Libraries (/forum-10.html) +--- Forum: General Software Library (/forum-13.html) +--- 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. 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.