50G solving simultaneous equations with fraction coefficients



#5

Hello all,
I am trying to solve (numerically) simultaneous equations that contain fractions as coefficients. I am using NUM.SLV > solve lin systems. However, on the matrix editor, I am unable to enter fractions as coefficient. What puzzles me more is that the matrix editor, when not in 'solve lin systems' menu, DOES let me enter fractions when I do 'a/b'... It's kind of annoying to convert all the fractions to decimals. Is there any way around this? Thanks a lot..


#6

The lin sys solver solves a matrix system, A*x=B.

Just type the A and B matrices without using the numeric solver.

Make sure the calculator is in exact mode.

Use the matrix editor, MTRW, to enter the B matrix. Leave it on the stack. Enter the A matrix which will then be on the stack below the B matrix. Press the divide key. Problem solved.

#7

Hello,

If you are trying to enter fraction elements in the Matrix Writer, you have to set the 50G in RPN mode, enter the matrix editor and input the fraction as a division. For instance, if your matrix has a row like 1/2, 3/8 and 5/16, you just type
1 [spc] 2 [/] [ENTER]
3 [spc] 8 [/] [ENTER]
5 [spc] 16 [/] [ENTER]
The Matrix Writer will perform the division and put the fraction in the matrix as a real number.

Hope this helps.


#8

Contact our support department. They may help you out on this matter. I know there is an example of SLE on the site but the coefficients are either decimals or fractions. They may have a solution to this problem. Owner.

Edited: 30 Sept 2008, 3:50 p.m.


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