Extracting matrices of Conduction Transfer Functions model

[charbelsalameh-accenta]

In reference to the Conduction Transfer Function Module (from the Engineering Reference chapter 3 paragraph 3.1.2), is it possible to extract the matrices A, B, C and D from the equations 3.9 and 3.10 via the API? If not is it possible to extract them from the source code or the module itself by adding a modification that allows the extraction of this info?
The idea is to be able to extract the info regarding the building elements and replicate it directly in another script outside of Eplus.

[Myoldmopar]

The generated CTFs are reported in the EIO file as:

! <Construction CTF>,Construction Name,Index,#Layers,#CTFs,Time Step {hours},ThermalConductance {w/m2-K},OuterThermalAbsorptance,InnerThermalAbsorptance,OuterSolarAbsorptance,InnerSolarAbsorptance,Roughness
! <Material CTF Summary>,Material Name,Thickness {m},Conductivity {w/m-K},Density {kg/m3},Specific Heat {J/kg-K},ThermalResistance {m2-K/w}
! <Material:Air>,Material Name,ThermalResistance {m2-K/w}
! <CTF>,Time,Outside,Cross,Inside,Flux (except final one)
 Construction CTF,EXTWALL09,   1,   4,  10,   0.250,      2.545    ,   0.900,   0.900,   0.930,   0.920,Rough
 Material CTF Summary,A2 - 4 IN DENSE FACE BRICK,  0.1015,         1.245,   2082.400,      920.480,  0.8151E-01
 Material:Air,B1 - AIRSPACE RESISTANCE,  0.1604    
 Material CTF Summary,C3 - 4 IN HW CONCRETE BLOCK,  0.1015,         0.813,    977.126,      836.800,  0.1249    
 Material CTF Summary,E1 - 3 / 4 IN PLASTER OR GYP BOARD,  0.0191,         0.726,   1601.846,      836.800,  0.2622E-01
 CTF,  10,      0.13798293E-11,      0.37791605E-13,      0.62430365E-10,     -0.37641895E-14
 CTF,   9,     -0.32803272E-08,      0.29957965E-10,     -0.60855585E-07,      0.10196130E-10
 CTF,   8,      0.23798937E-05,      0.21201386E-07,      0.21649368E-04,     -0.88463039E-08
 CTF,   7,     -0.58681830E-03,      0.38118076E-05,     -0.26539191E-02,      0.25879177E-05
 CTF,   6,      0.46201315E-01,      0.18871248E-03,      0.12095718    ,     -0.26290426E-03
 CTF,   5,      -1.2828326    ,      0.27337422E-02,      -2.1646101    ,      0.91268483E-02
 CTF,   4,       13.603722    ,      0.11920058E-01,       17.065323    ,     -0.12663352    
 CTF,   3,      -62.546623    ,      0.15112973E-01,      -64.276822    ,      0.73877384    
 CTF,   2,       133.27916    ,      0.47407165E-02,       120.00639    ,      -1.9706501    
 CTF,   1,      -130.02410    ,      0.22467087E-03,      -106.88261    ,       2.3359192    
 CTF,   0,       46.959982    ,      0.19329083E-06,       36.168919    

Is that what you are looking for? Just make sure your Output:Construction stuff is set up to report it (see IO ref and Output Examples documentation for more info).

[charbelsalameh-accenta]

Thank you for your reply, it is really appreciated. It looks like the matrix I am looking for. I will look into more details to understand how it is constructed with the nodes indices.