# I keep getting the error message that the variables must be of data type double and it is currently of type sym.

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Ana il 21 Feb 2024
Commentato: Ana il 21 Feb 2024
%I'm unsure how else to run this code to solve the 10 eqn system where
syms AB BC AD BD CD DE CE Ax Ay Ey
eqn2=Ay+AB==0;
eqn3=74+BC+(3/5)*BD==0;
eqn4=-AB-(4/5)*BD==0;
eqn5=-BC+(3/5)*CE==0;
eqn6=-24-CD-(4/5)*CE==0;
eqn8=CD+(4/5)*BD==0;
eqn9=-DE-(3/5)*CE==0;
eqn10=Ey+(4/5)*CE==0;
[AB BC AD BD CD DE CE Ax Ay Ey]=solve(eqn1, eqn2, eqn3, eqn4, eqn5, eqn6, eqn7, eqn8, eqn9, eqn10,[AB BC AD BD CD DE CE Ax Ay Ey])
AB =
BC =
74
BD =
CD =
DE =
46
CE =
Ax =
Ay =
Ey =
##### 2 CommentiMostra NessunoNascondi Nessuno
Walter Roberson il 21 Feb 2024
Modificato: Walter Roberson il 21 Feb 2024
The code works properly here.
Try
restoredefaultpath; rehash toolboxcache
Ana il 21 Feb 2024
it is still giving me these error messages
"Variable AB must be of data type double. It is currently of type sym. Check where the variable is assigned a value."
is it because I introduce them using 'syms', it also said i cannot use rehash in my code on Matlab Grader

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### Risposta accettata

Walter Roberson il 21 Feb 2024
%I'm unsure how else to run this code to solve the 10 eqn system where
syms AB BC AD BD CD DE CE Ax Ay Ey
eqn2=Ay+AB==0;
eqn3=74+BC+(3/5)*BD==0;
eqn4=-AB-(4/5)*BD==0;
eqn5=-BC+(3/5)*CE==0;
eqn6=-24-CD-(4/5)*CE==0;
eqn8=CD+(4/5)*BD==0;
eqn9=-DE-(3/5)*CE==0;
eqn10=Ey+(4/5)*CE==0;
[AB BC AD BD CD DE CE Ax Ay Ey]=solve(eqn1, eqn2, eqn3, eqn4, eqn5, eqn6, eqn7, eqn8, eqn9, eqn10,[AB BC AD BD CD DE CE Ax Ay Ey]);
AB = double(AB);
BC = double(BC);
BD = double(BD);
DE = double(DE);
CE = double(CE);
Ax = double(Ax);
Ay = double(Ay);
Ey = double(Ey);
##### 1 CommentoMostra -1 commenti meno recentiNascondi -1 commenti meno recenti
Ana il 21 Feb 2024
that worked perfectly thank you so much!

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