finding the sampling frequency from the following

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u-will-neva-no
u-will-neva-no le 11 Déc 2011
Hi everyone,
I have to work out the sampling frequency. I have set up a vector of time values with 128 elements sampled at twice a second. The signal has to be calculated with five cycles in 63.5s and the code for that is:
t = 0:0.5:63.5; yt = sin(2*pi*t*5/63.5);
How do I get the sampling frequency from this information?
Thanks!

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Walter Roberson
Walter Roberson le 11 Déc 2011
Sampling frequency is 1 divided by sample rate.
1 / (M seconds per sample) = ? samples per second
and samples per second is Hz .
  2 commentaires
u-will-neva-no
u-will-neva-no le 11 Déc 2011
Looking at wikipedia (which may be wrong) it states that the sampling rate is the same as the sampling frequency. So my sampling rate is either 0.5 or 2...
Walter Roberson
Walter Roberson le 11 Déc 2011
Frequency is always expressed in cycles (or items) per unit time, never in units of time.
Perhaps I should have said,
"Sampling frequency is 1 divided by sample period"

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