MATLAB: “Argument to dynamic structure reference must evaluate to a valid field name” error please code also been attached????? and also i cannot execute it.

"argument to dynamic structure reference must evaluate to a valid field name" error please

clc;
close all;
%%giving the inputs for calculating the Specular Reflections
thetaInDegrees1 = linspace(44,46,100);
thetaInDegrees2 = 45;
thetaInDegrees3 = 0;
g = 0;
Lcorr = 2.3;
x = 25 * Lcorr;
y = 25 * Lcorr;
f = 300e9;
%% Formula For finding Specular Reflections
Lx = 10*Lcorr;
Ly = 10*Lcorr;
c = physconst('lightspeed');
lambda = c/f;
K = 2*pi/lambda;
Vx = K*(sin(thetaInDegrees1)-sin(thetaInDegrees2)*cos(thetaInDegrees3));
Vy = K*(-sin(thetaInDegrees2)*cos(thetaInDegrees3));
rho= sinc(Vx*Lx) * sinc(Vy*Ly);
rhorho = exp(-g) * ((rho).^2);
%printing in degrees
plot(thetaInDegrees1,rhorho);
hold on
plot(thetaInDegrees1,rhorho);
hold on
plot(thetaInDegrees1,rhorho);
hold on
plot(thetaInDegrees1,rhorho);
hold on
axis equal
xlabel('\theta');
ylabel('<\rho\rho^*>_s_p_e_c_ _o_n_l_y_ [dB]')

Best Answer

You need to change those lines
Vx = K.(sin(thetaInDegrees1)-sin(thetaInDegrees2)*cos(thetaInDegrees3));
Vy = K.(-sin(thetaInDegrees2)*cos(thetaInDegrees3));
by
Vx = K*(sin(thetaInDegrees1)-sin(thetaInDegrees2)*cos(thetaInDegrees3));
Vy = K*(-sin(thetaInDegrees2)*cos(thetaInDegrees3));
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