MATLAB: Error using | “Inputs must have the same size.”

kmeans

Hello everybody,

I have made the attached kmeans clustering algorithm for un-predefined number of clusters. It is supposed to update each cluster center until either the cluster memberships are not changed, or the local distortion improvement corresponding to each cluster is less than a threshold. But I receive this error at line 113: Error using | "Inputs must have the same size."

and when I change it to , I get this error: Operands to the and && operators must be convertible to logical scalar values.

Could anyone suggest a solution?

Best Answer

I'm assuming the error comes from this line

if (membership_idx == temp_idx)  || (L < 0.7)

and occurs before membership_idx or temp_idx (or both) is not scalar.

You would have to wrap the first expression in all or any depending on the behaviour you want:

if all(membership_idx == temp_idx) || (L < 0.7)

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MATLAB: Reshaping error after clustering pixels > 0 in image

I understand the problem but I don't have an entirely clear picture of what the imIDX variables should be.

I think all you need to do is replaced these reshape lines

imIDX1 = reshape(cluster1, size(idx));

with these pairs of lines

imIDX1 = zeros(size(idx)); 
imIDX1(idx) = cluster1;

so give that a try and it it's not what you're looking for, please describe how it differs from your goal.

MATLAB: “Inputs must be floats, namely single or double.”

syms t; % define t as a variable
r(t) = t^2; % define tracking function
VT = p*r(T); %V(T) = p*r(T)

t is symbolic so r is symbolic so VT is symbolic. You cannot use a symbolic parameter for initial conditions.

ode45 is completely unable to process symbolic formula. Use dsolve for symbolic systems

Best Answer

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MATLAB: Reshaping error after clustering pixels > 0 in image

MATLAB: “Inputs must be floats, namely single or double.”

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