Save data from a loop with a negative variable

Hey guys :) I have a little question, how can i save data from a loop with a variable evolving between -5 to 5 for example, because when I try to save data by using variable_stored, it says that i have to use positive integer or logical...

[The Matlab Spot]

Correct me if i am wrong

if a = [-5:1:5];

You are not able to save a in a mat file?

Answer 1

[Simon]

Hi!

Make a table like

tt = -5:5;

Access your variable with index -3 like

V(tt==-3)

PS: you should not double-post your questions.

[Patrick Allaglo]

Ow Sorry for the double post :( Plz look at my code, i dont know where to put it...

Code :
function f = evalpoly1(p,x,b)
t = length(p);
y = 0;
z = 0;
n = t-1;
e = n:-1:0;
for n = 1:n+1
  for C = (x:b);
      y = y + p(n) * x^e(n);
      z = z + p(n) * b^e(n);
  end
end
disp('y = ')
disp(y)
disp('z = ')
disp(z)
end

end

Im trying to save polynomial data with the variable evolving between x and b for example -5 and 5

[Simon]

What are x and b? Are these start and end of interval (-5 and 5)?

t = length(p);
y = 0;
z = 0;
N = t-1;
e = N:-1:0;
tt = x:b;
y = zeros(numel(tt), 1);
for C = (x:b);
  for n = 1:N+1
    y(tt==C) = y(tt==C) + p(n) * C^e(n);
  end
end

Don't mix n (number of coefficients) with n (loop counter)! And see my order of the loops.

[Patrick Allaglo]

Yes x and b are start and end of interval.