 Programming a Matrix(hp49G+) ? - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: Programming a Matrix(hp49G+) ? (/thread-58204.html) Programming a Matrix(hp49G+) ? - Barry - 06-09-2004 Hi I would like to take a value from the stack place it into a matrix, and get an ouput value. I have tried << -> x '[[cos(x),sin(x)][sin(x),cos(x)]]'>> I get a "bad argument error' Normal equation work. Does anyone know how to do this? Thanks Barry Re: Programming a Matrix(hp49G+) ? - Vieira, Luiz C. (Brazil) - 06-09-2004 Hi, Barry; I remember that till the HP48, all arguments possible in an array are numbers, even complex (not sure if bunaries are allowed as well... I think not). I don't recall having algebraics as array "arguments". anyway, you can arrange your expressions in lists and disassemble/reassemble: turn lists into arrays. If I am not wrogn, the HP49G+ has some new features for this. Also, having the expressions organized in lists, like`{{cos(x) sin(x)}{sin(x) cos(x)}}`allows you to use a handy command: DOLISTS (also DOSUBS may help, depending on what you want). I guess SYS RPL guys may have other possibilities. I'm starting to read about SYS RPL, and there are many interesting things there... It's a new world. Hope you succeed. If not, post again. Cheers. Luiz (Brazil) Re: Programming a Matrix(hp49G+) ? - Vepa - 06-09-2004 ```<< -> x '[[cos(x),sin(x)][sin(x),cos(x)]]'>> I get a "bad argument error' Normal equation work. You need an ALGebraic side trick: << -> x << `[[COS(x),SIN(x)] [SIN(x),COS(x)]]` >> >> BYTES # 917Bh 92.5 `[V,P,N]` ``` Re: Programming a Matrix(hp49G+) ? - V-PN - 06-09-2004 ```You could also use a pure RPN program: << -> x << [[ 'COS(X)' 'SIN(X)' ] [ 'SIN(X)' 'COS(X)' ]] 'X' x = SUBST ->NUM >> >> BYTES # D351h 109.5 You may leave the ->NUM away if you want to do it manually. [V P N] ```