Index exceeds number of array elements (1)?

This is the code on derivada.m:

function [Hd] = derivada(valores, h)
   i = 2; 
   while i < length(valores)
       Hd(i) = (valores(i+1) - valores(i-1))/(2 * h);
       i = i+1;
   end
   Hd(1) = ((valores(2) - valores(1))/h);
   Hd(length(valores)) = (valores(length(valores)) - valores(length(valores)-1))/h;
end

And this is the main:

valores = y;
h = 0.1;%t(2) - t(1);
Hd = derivada(valores, h);

This is the error:

Index exceeds number of array elements (1)

Answer 1

[Cris LaPierre]

It would appear valores only has a single value, yet you are trying to index a second.

You might find the explanation I gave in this post helpful.