matlabs fft frequencies
Hello Sir,
When i "define" a signal that is meant
to look like some sinusoid,I think its right to assume
that that matlab assumes the sample points are
spaced out by 1 second intervals.
If so when a take the period of the "wave" its > 1,
therefore the frequency which equals 1/period is gonna be less
than 1.But the frequencies returned by the fft are enumerated
from 0 to n-1 or 1 to n-1.So how is one supposed to interpret
these frequencies?Thanks.
</pre>
When i "define" a signal that is meant
to look like some sinusoid,I think its right to assume
that that matlab assumes the sample points are
spaced out by 1 second intervals.
If so when a take the period of the "wave" its > 1,
therefore the frequency which equals 1/period is gonna be less
than 1.But the frequencies returned by the fft are enumerated
from 0 to n-1 or 1 to n-1.So how is one supposed to interpret
these frequencies?Thanks.
</pre>
0
Comments
type "doc fft" and it'll explain what you need.