HP Forum Archive 14

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vectors multiplication Message #1 Posted by Dennis on 23 Apr 2004, 1:08 p.m. Hello, I have the Hp49G calculator and I have a problem: There is no problem writing [[1,2,3][4,5,6]*[[7,8][9,10][11,12]] and the calculator gives[[58,64][139,154]]. But if the two matrix are two vectors ((n*1) and (1*n)) the multiplication insn't possible. [ERROR: invalid dimension!!!] (instead I should obtain a number). How can I do for solve this operation?

Re: vectors multiplication Message #2 Posted by Tom Sherman on 23 Apr 2004, 2:36 p.m., in response to message #1 by Dennis Dennis, Go to the math menu, select the vectors menu, and then select DOT. If you are in RPN mode, you will want to enter your vectors before doing this; if you are in algebraic mode, the vectors are entered after selecting DOT. If you have a manual, see page 8-5. I hope it works for you. Tom

Re: vectors multiplication Message #3 Posted by Dennis on 24 Apr 2004, 6:30 a.m., in response to message #2 by Tom Sherman Thank you very much Tom, it works poperly. Dennis

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