how to plot results ?

Hello,

I am running for loop and saving results from error to e1{1}.... for each iteration.

but i want to plot the results. how should i do this ? is this correct method of saving results?

*******************************

for p=1:3

for q = 1:50

v      = ['w', num2str(q),'(2,end)'];

w(q) = eval(v);

end

sim('with50osc.mdl')

e2{1}=error;

e3{2}=error;

e4{3}=error;

end

****************************************

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Aniket]

Hello i have seen you link but i am doing simulations in simulink saving my results as an array in "error" variable and for each iteration i want to get the results as saved in "e" so i can plot results for iteration 1,2,3...

[Walter Roberson]

You should not be constructing your "w" in that manner.

After your "sim" use

e{p} = error;

However, I cannot tell you how to plot after the loop until you say more about what "error" will look like. Is it a scalar? A vector? A structure?

[Walter Roberson]

You note in your duplicate that

and the results are storing as following way

< 25627*2 double > [ ] [ ] [ ]

so your simulation does not appear to be defining a useful error result for the other iterations.

It is not clear why you would want to simulate the same system 4 different times?

How do you want that 25627*2 to be plotted ?

[Aniket]

error is from simulink scope results that is an array of vector < 25646x2 double>

1 coloumn is time and 1 coloumn is data

[Aniket]

no its an pool of oscillators and first time i am defining initial conditions and for second time initial conditions are final values of first simulation like i have to do for 4 time ...so i can get a better results and thats why i want to save and plot first iteration values , second iteration values .... upto 4 times and compare it

[Walter Roberson]

colors = {'r', 'g', 'c', 'b'};  %color for traces
for K = 1 : length(e)
  plot(e{K}(:,1), e{K}(:,2), colors{K} );
  hold on
end

[Aniket]

Thanks for this its working