How do I fix this error: "Error using minus Matrix dimensions must agree"?

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Sean Quinn
Sean Quinn 2016-1-28
评论： Walter Roberson 2016-1-29
Here is my script:
function f = objectiveL2(p, pIndex, data, trainingIndex, kinesinName, lambda)
if length(p) ~= size(pIndex,1)
error('p and pIndex must have the same length');
end
p00 = InitialParameterValues(kinesinName);
p0 = InitialParameterValues(kinesinName);
for i = 1:size(pIndex,1)
for j = 1:size(pIndex,2)
if pIndex(i,j) ~= 0
p00(pIndex(i,j)) = p(i)*p00(pIndex(i,j));
end
end
end
for i = 1:size(data,1)
if strcmp(data(i,1).kinesinName,kinesinName)
kinesinIndex = i;
break;
end
end
f = 0;
for i = 1:length(trainingIndex)
% Define initial conditions for the model
x0 = zeros(12,1);
x0(1) = data(kinesinIndex,trainingIndex(i)).kinesinConc; % Kinesin
x0(2) = data(kinesinIndex,trainingIndex(i)).MTConc; % MT
x0(8) = data(kinesinIndex,trainingIndex(i)).mantATPConc; % mantATP
tspan = [0;data(kinesinIndex,trainingIndex(i)).time];
[~,x] = ode45(@(t,x,p) SteppingModel_no78(1,x,p00), tspan, x0);
y_model = p00(15)*(x(2:end,9)+x(2:end,10));
y_data = data(kinesinIndex,trainingIndex(i)).fluorescence - 1;
f = f + sum((y_model - y_data).^2)/length(y_data);
end
f = f + lambda*sum(((p0(1:14) - p00(1:14))./p0(1:14)).^2);
end
Here is the error I get
Error using -
Matrix dimensions must agree.
Error in objectiveL2 (line 38)
f = f + sum((y_model - y_data).^2)/length(y_data);
Error in @(p)objectiveL2(p,pIndex,data,trainingIndex,kinesinName,0.0000000000001)
Error in fmincon (line 534)
initVals.f = feval(funfcn{3},X,varargin{:});
Error in main (line 60)
[pFit, fval, flag] = fmincon(@(p) objectiveL2(p, pIndex, data, trainingIndex, kinesinName, 0.0000000000001), ...
Caused by:
Failure in initial user-supplied objective function evaluation. FMINCON cannot continue.
I know where the error is occurring (line 38), but I really don't know how to fix it. It looks correct to me. Any help would be greatly appreciated.
Thanks!
  2 个评论
Geoff Hayes
Geoff Hayes 2016-1-28
Sean - what are the dimensions of y_model and y_data? Since you are subtracting one from the other, they must have the same number of rows and the same number of columns.
Walter Roberson
Walter Roberson 2016-1-29
Where is kinesinIndex being defined? Is it a function, or is it being defined in an outer function that this one is nested inside?

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