Re: HP48g function Message #3 Posted by Karl Schneider on 20 Feb 2006, 2:36 p.m., in response to message #1 by Mark Davies
Mark --
You're in luck! In collecge 15 years ago, I not only solved AC and DC loop circuits using matrix functions on my HP-15C, but also now have a 48G at which I am reasonably competent.
After setting up the exactly-determined system-coefficient matrix and the system-measurement vector (both real-valued for DC systems; both complex-valued for AC systems):
- Choose "SOLVE" (above "7" key) with the green right-shift key
- Select "Solve lin systems"
- Enter the (square) matrix as A. Use brackets to enclose each row vector, with spaces between each coefficient; enclose all vectors within another set of brackets to make it a matrix. Enclose complex-valued numbers inside parentheses, with a comma between parts. Use the angle symbol if needed (green right-shift, "SPC"). Load the values with "ENTER".
- Enter the measurement-vector values as B, inside one set of brackets. (The same guidance applies for complex-valued numbers.) Load the values with "ENTER".
- Press the "SOLVE" soft-menu key ("F").
- The answers will be in X. Use "EDIT" (softmenu key "A") to see the full values.
I used this procedure successfully to solve two examples in the HP-15C manual.
BTW, this question could also have been posed in the Usenet group comp.sys.hp48, but it's not inappropriate here.
Regards,
-- KS
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