what is wrong with the following code. I should have sent the full script. Sorry. On my macine the vector 'x' ranges from 0 to 10.1

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Fred 2013-9-27

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% trajetory 1
clf
m = .1; %n = .2;
% xx=1:10;y=[1 0 0 0 0 0 0 0 1 0];stem(xx,y)
 %hold on
   x(1) = 0; i = 1; y(1) = 1.1;
   while x(i) <= 1.0
       %x(i)= i;
       x(i+1) = x(i) + 0.1; 
       y(i+1) = y(1) - m*x(i+1); 
       i = i+1;
   end
   plot(x,y,'r')

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Honglei Chen 2013-9-27

Could you explain what the issue is, why x range from 0 to 10.1 is an issue for you?

Jan 2013-9-27

@Fred: Please do not post multiple questions for the same problem. This confuses the readers and wastes their time, when they post an answer which has been given before in another thread.

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Walter Roberson 2013-9-27

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Possibly you already had an array "x" in memory. Your code does not reinitialize "x" to be a single element long: if "x" already exists it just assigns to the first element of it and then goes ahead trying to use the full length of whatever "x" was there.