index no for iterations

Attempted to access x(2,1.01); index must be a positive integer or logical.

Error in ==> latest at 19 dx1=x(2,i);

my code ::

for i = 0:0.01:2 yd(j) = sin(2*pi*i); j=j+1; dx1=x(2,i);

should i be integer values only..if then my yd will always be 0 right..i need values of yd from 0 to 2..and corresponding dx1...

please help me out

Answer 1

[Stephen23]

You probably don't need a loop at all, and can simply vectorize the code anyway:

x = 0:0.01:2;
y = sin(2*pi*x);

and most likely any following value manipulations can also be vectorized. This is much faster and neater than using loops, which as something low-level programming languages rely on but are not a good use of MATLAB.