Undefined operator '*' for input arguments of type 'matlab.ui.Figure'.

Hello I get an error when I'm running this part:

I get the error in the line U_det that says Undefined operator '*' for input arguments of type 'matlab.ui.Figure'. I tried to figure it out as others had this type of error but the current solutions didn't work out. Bz is a 1000x1000 matrix btw.

for j = 1:numel(Bz)
   offset(j) = Bz(j);
   H1_z = H0 + offset(j);                  % Applied field, + offset
   H2_z = H0 - offset(j);                  % Applied field, - offset
   H_z = [H0 H1_z H0 H2_z]; 
   
   Mz = (pi*V_c^3*Ms)/6;                   % Magnetic moment in [A/m]
   digits(35)
   xH_z = vpa((Mz*u0*H_z)/(Kb*T));
   M_tot_spions_z = langevinfunc(17.6e-9,27.92e-9,Ms,2*pi*10^-7,xH_z);
   U_det = -S_z*V_c*2*pi*f*M_tot_spions_z;  % Induced voltage [V]
 
  
   % FFT of U
   Y = abs(fft(U_det));
   L = length(t);
   P2 = (Y/L);
   P1 = P2(1:L/2+1);
   P1(2:end-1) = 2*P1(2:end-1);
   fdomain = f_particle*(0:(L/2))/L;
   figure
   plot(fdomain, P1)
   title([' Fourier Analysis @ depth = ',num2str(depth_m(j)), ' [m]'])
   xlabel('Frequency [s]')
   ylabel('Voltage [V]')

end

[Walter Roberson]

What is

class(S_z)
class(f)

My guess is that your f is the handle to a figure.

[Bas Bloemendaal]

Solved! thankyou