MATLAB: Error:Subscript indices must either be real positive integers or logicals.

error

Hi,

I get this error ,

Subscript indices must either be real positive integers or logicals. The line with this error is,

simout_diff=(simout_ps(t_plot,:,1))-(full_vehicle_data_cw(t_plot,:,1));

Please help me in resolving this error and what is meant by subscript indices?

Best Answer

Matlab is telling you that 't_plot' is neither an integer greater than zero nor a logical variable. Since it is interpreted as an index to both the 'simout_ps' and 'full_vehicle_data_cw' arrays, this violates one of matlab's rules. In case you meant these to be functions rather than arrays, then for some reason matlab is not recognizing them as such.

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MATLAB: To plot the model error against time

Priya, the "correct" syntax for subplots is:

 subplot(2,1,1)  % notice the commas

Other than that, what is

 size(deltaSignal)
 size(percentageDifference)

And finally, I believe what you are trying to do is:

 plot(deltaSignal,percentageDifference)

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Your can't plot your code.

%example

simout_a=rand(10,2);
simout_b=rand(10,2);
residsumsq = norm(simout_b(:,1)-simout_a(:,1),2)^2;
tsumsq = norm(simout_b(:,1)-mean(simout_b(:,1)),2)^2;
R2 = 1-(residsumsq/tsumsq);

Your result are all scalar

Can you explain what you need to plot? maybe

plot(simout_a(:,1)); 
hold on;
plot(simout_b(:,1));
hold off

Best Answer

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