How to make a symmetric matrix from a muxed signal in MATLAB fcn block?

Hello,
I am developping a system that utilizes an MNA in simulink and need to use the fcn Block in order to calculate de correct PV tension.
I have 60 converters that are connected on a DC bus in a symmetrical format and manage to make the MNA work for a single side, but as soon as I use the variable I wrote the length of the muxed signal in for different points it gives me an error.
Here is the code I made:
function [UPV, Ibus]= fcn(IPV, Ubus)
R1 = 0.00748 / 2;
R = 0.00748;

n = length(IPV); %Logging the number of input in the muxed signal
d = floor(n/2); %Finding the end of the first side
e = d+1; %Start of the second side
G = diag(2/R * ones(n, 1)) + diag(-1/R * ones(n-1, 1), 1) + diag(-1/R * ones(n-1, 1), -1); %Making the impedance matrix.
G(1, 1) = 1/R; %Correction of the first resistor
G(d,d) = 1/R; %Correction of the resistor near the injection point on one side
G(e,d) = 0; %Removing resistor from injection point
G(d,e) = 0; %Removing resistor from injection point
G(e,e) = 1/R; %Correction of the resistor near the injection on the second side
G(n, n) = 1/R; %Correction of the last resistor

B = zeros(n, 1);
B(d) = 1;
B(e) = 1;
A = R1;
MNAG = [G -B; B’ A]; %MNA matrix
sources = [IPV(:); Ubus];
resultats = MNAG sources;
UPV = resultats(1:n);
Ibus = 2*resultats(n+1);
In the various iterrations of this code I managed to make the programm run but all output became NaN.Hello,
I am developping a system that utilizes an MNA in simulink and need to use the fcn Block in order to calculate de correct PV tension.
I have 60 converters that are connected on a DC bus in a symmetrical format and manage to make the MNA work for a single side, but as soon as I use the variable I wrote the length of the muxed signal in for different points it gives me an error.
Here is the code I made:
function [UPV, Ibus]= fcn(IPV, Ubus)
R1 = 0.00748 / 2;
R = 0.00748;

B = zeros(n, 1);
B(d) = 1;
B(e) = 1;
A = R1;
MNAG = [G -B; B’ A]; %MNA matrix
sources = [IPV(:); Ubus];
resultats = MNAG sources;
UPV = resultats(1:n);
Ibus = 2*resultats(n+1);
In the various iterrations of this code I managed to make the programm run but all output became NaN. Hello,
I am developping a system that utilizes an MNA in simulink and need to use the fcn Block in order to calculate de correct PV tension.
I have 60 converters that are connected on a DC bus in a symmetrical format and manage to make the MNA work for a single side, but as soon as I use the variable I wrote the length of the muxed signal in for different points it gives me an error.
Here is the code I made:
function [UPV, Ibus]= fcn(IPV, Ubus)
R1 = 0.00748 / 2;
R = 0.00748;

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