Problems plotting a function

Hi, I am trying to plot the result from the given script:

syms f(x) x g h
h = 1.0545718.*10.^-34
g = 5.33.*10.^-28
n = 2;
res = exp(-3.*x./2.*i.*g./h)
for k=1:n
  res = simplify(diff(res,x) - x*res);
end
res = res

x = linspace(-10*pi, 10*pi, 1000); 
s=res; 
real_y1 = real(y);
imag_y1 = imag(y); 
plot(real_y1,imag_y1,'LineWidth',2)
figure(1)

however, I get the strange complaint from Matlab:

Error using plot
Data must be numeric, datetime, duration or an array convertible to double.

Error in Operator_SUSY_Psi (line 15)
plot(real_y1,imag_y1,'LineWidth',2)

Which plotting function should I use?

[Stephen23]

You call plot with these variables:

real_y1 = real(y);
imag_y1 = imag(y); 
plot(real_y1,imag_y1,'LineWidth',2)

but y is not defined anywhere in the code that you show us. So we have no idea what y is, other than it is clearly not numeric (as the error message clearly states).

Answer 1

[Star Strider]

First, define ‘h’ as:

h = 1.0545718E-34;

Second, see if this does what you want:

x = linspace(-10*pi, 10*pi, 1000); 
y=double(res(x)); 
real_y1 = real(y);
imag_y1 = imag(y); 

figure(1)
plot(real_y1,imag_y1,'LineWidth',2)