generating impulse

hi,

how can I generate an impulse with sampling frequency fs,which has an amplitude = 9 at the sample number fs = K.

thank u very much in advance

Answer 1

[Wayne King]

Just create a vector of zeros the length you need and then place a 1 at the correct index in the vector.

x = zeros(1e3,1);
x(500) = 1;

[John]

Thanks

Your example seems to not work for non integer values (0.02)...

It's not exactly what I'm looking for.

I need an impulse which could be used in further processing

[Wayne King]

you cannot index a vector at a noninteger value. However, the indices of the vector can correspond to n*DT where DT is the sampling interval. If you view x as sampled at 0.01 seconds, then x(2) is the value at 0.02

So whatever sampling interval you want to use in your application, just put the 1 at the index of the vector that corresponds to that sampling instant.

[Wayne King]

just to be clear, x(3) would be the value at 0.02 (given a 0.01 sampling interval) if you take the first time to be t=0