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## RE: Error installing the symbol package

 From: Simon A. Turner Subject: RE: Error installing the symbol package Date: Sat, 6 May 2017 16:15:23 +0100

 Hello Doug I was trying to brute force reverse engineer transmission line parameters, I have a problem where I am given the A, B, C, D and need to calculate the R, L, C, G (see attached image). I think there is another way and I am reviewing my study material, “again” Kind regardsSimon Turner  From: Doug Stewart [mailto:address@hidden Sent: 06 May 2017 15:56To: Simon A. Turner Cc: Help GNU Octave Subject: Re: Error installing the symbol package   On Sat, May 6, 2017 at 10:36 AM, Simon A. Turner wrote:Hello Doug I am looking for numerical answers, I was led to believe that I needed this plugin to solve a simultaneous equation input with less effort than converting my equations to a matrix. Either way the problem of the plug in not installing remains for quite a few people as a quick google search reveals. Kind regardsSimon   if you have 2 loops              --------------      r1  -------------------------------------r3---------------- vout          |                                                  |                                     |       Vin                    i1                         r2                     i2           r4          |                                                  |                                     |           ___________________________________________________  i1*r1 + i1* r2  - i2*r2                                    =Vin-i1*r2             + i2*r2 +i2*r3  + i2*r4            =0 vout=i2*r4  let r1=1r2=2r3=3 ohmsr4=4Vin =5 volts then we have  i1                       i2r1+r2              -r2                                         = 5-r2                  + r2 +r3 +r4                           =0 a=[ 3    -2;     -2   9]b=[5     0] cur=a\b vout=cur(2)*4 octave gives:  >> a=[ 3    -2;     -2   9]a =    3  -2  -2   9 >> b=[5     0]b =    5   0 >> >> cur=a\bcur =    1.95652   0.43478 >> >> vout=cur(2)*4vout =  1.7391 volts    I hope this helps  :-)

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