freq

Generate a vector of frequency locations.

Syntax

f = freq(time)

f = freq(n,fs)

Inputs

time
A vector of equally spaced times.
Type: double
Dimension: vector
n
The number of points.
Type: integer
Dimension: scalar
fs
The sampling frequency.
Type: double
Dimension: scalar

Outputs

f
The vector of frequencies.

Examples

Example with time vector:

f = freq([0:0.001:0.009])
f = [Matrix] 1 x 10
  0  100  200  300  400  500  600  700  800  900
Example with sampling frequency specified:
f = freq(10,1000)
f = [Matrix] 1 x 10
  0  100  200  300  400  500  600  700  800  900

Comments

freq is typically used to create x axis values for a plot with frequency domain data. The most common y dimensions are FFT magnitudes and PSD values. The output is for the two-sided spectrum. The frequencies for the negative side of the spectrum are located above the Nyquist frequency.