No error but no outcome as well

for k=1:D
  P_pred   = A(:,k) * P(:,k) * A(:,k)' + Q(:,k);
  D(:,k) = P(:,k) * A(:,k)' / P_pred;
  M(:,k)   = M(:,k) + D(:,k) * (M(:,k+1) - A(:,k) * M(:,k));
  P(:,k) = P(:,k) + D(:,k) * (P(:,k+1) - P_pred) * D(:,k)';
end

 plot(D:M:P);

It does show nothing. No error but not outcome either. What's wrong? I am not getting the plot I am supposed to.

[Stephen23]

@Stelios Fanourakis: what do you expect

D:M:P

to do? Did you read the colon documentation?

[Stephen23]

Duplicate:

https://www.mathworks.com/matlabcentral/answers/357091-why-no-plot