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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

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