what is the error? Example?
显示 更早的评论
(1)
% ket Transforms a vector into normalized column vector.
function w=ket(;5)
[y,x]=size(v);
if x>1,
w=v.';
else
w=v;
end % if
% normalisation
w=w/sqrt(w'*w);
(2)
function Q = bra_ket(Psi,Phi,f_op)
Q = integral3(@(r1,r2,r3) Psi(r1,r2,r3).*f_op(Phi(r1,r2,r3)),r1min,r1max,r2min,r2max,r3min,r3max)
end
(3)
function Q = bra_ket_traps(Psi,Phi,f_op,r1,r2,r3)
opPhi = f_op(Phi,r1,r2,r3); % Here you might need additional argument
Q = trapz(r3(1,1,:),trapz(r2(1,:,1),trapz(r1(:,:,1),conj(Psi).*(opPhi)),2),3);
end
(4)
% cohstate cohstate(alpha,M) gives the state vector of M elements for
% a coherent state with given alpha
function v=cohstate(alpha,M)
v=zeros(M,1);
v((0)+1)=1;
for n=0:M-2
v((n+1)+1)=alpha/sqrt(n+1)*v((n)+1);
end % for
v=v/sqrt(v'*v);
回答（2 个）
Voss
2023-2-9
Invalid syntax:
function w=ket(;5)
Inside the parentheses in a function definition should be a list of variable names. ";5" is not a list of variable names.
Maybe you meant:
function w=ket(v)
11 个评论
Idrees Muhammad
2023-2-10
Voss
2023-2-10
I see you added more functions to the question. What's the complete error message you get now?
Idrees Muhammad
2023-2-10
Idrees Muhammad
2023-2-10
Walter Roberson
2023-2-10
You need to either call ket from other code or else you need to go down to the command line and invoke it passing in values. For example
V = [2, 3-2i, -4]
ket(V)
Idrees Muhammad
2023-2-10
Idrees Muhammad
2023-2-10
Idrees Muhammad
2023-2-10
Walter Roberson
2023-2-10
Question: when you go to run cohstate by pressing the green Run button, where are you expecting matlab to look to find values for alpha and M?
Idrees Muhammad
2023-2-10
Walter Roberson
2023-2-10
If you are using the option on the green Run button to have it prompt you for the parameter values then OK, go ahead and do that. Personally I find doing that to be slow and not to offer me fine enough control for my purposes, but if that is what you want to do, go ahead and get back to us if you encounter further errors in your code.
Personally I use the techniques I described earlier https://www.mathworks.com/matlabcentral/answers/1909685-what-is-the-error-example#comment_2608885
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2023-2-9
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