Asked by Lisa Justin
on 13 Jul 2012

How can i write the frequency vector for frequency range 5-400 hz using 50 frequncy points

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Answer by Wayne King
on 13 Jul 2012

Accepted answer

Hi Lisa, you cannot have 50 frequencies in 30 elements. Obviously whatever Q is here (is it a power spectral density estimate?) is an estimate at only 30 frequency points.

You can space your frequency vector to cover 5 to 400 Hz with fifty points and then select a subset of those 50 so that you can plot(f,Q)

freq = linspace(5,400,50); % just making up some junk data to plot Q = abs(randn(30,1)); plot(freq(1:30),Q)

Answer by Ryan
on 13 Jul 2012

Edited by Ryan
on 13 Jul 2012

`FrequencyVector = linspace(5,400,50); %linspace(min,max,# of points)`

Lisa Justin
on 13 Jul 2012

f=linspace(5,400,50); plot(f,Q) it won't work Q has a length of 30x1 and f has a length of 1x50 How can i make f 1x30 and still ranging from 5-400 and 50 frequency points

Ryan
on 13 Jul 2012

See Wayne King's answer. These type of details should be included in the original question to provide the best answer possible.

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