Dominant frequency of a ramp function (Linear function)

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Mukund Srivastava
编辑： Mukund Srivastava 2020-9-25
For a linear function y=mx where m is a constant, how to find the m such that the dominant frequency of the signal (y) attains a desired value? The code that I'm writing is yielding a dominant frequency at 0. How can I correct it?
Given the condition that y can reach a maximum value of 3, I need to define the rate of a linear signal y=mx such that the dominant frequency of the signal lies at 0.01.
I'm using the following code to perform this operation:
y=0.01:0.01:3; %Maximum value of 3 (fixed)
x=0.1:0.1:30; %Random values of x are given, and I'm trying to find the dominant frequency for this case.
% Based on the result for this x, I would've tweaked my 'x' values so as the dominant frequency reaches 0.01
y=abs(fft(y));
y=fftshift(y);
n=length(y);
f=(-n/2:n/2-1)*(2/n);
plot(f,y)
%Issue with the code is that it is yielding a dominant frequency at 0 for all the cases (random x values).
Further, I want to ask this question that is the dominant frequency for a linear function dependent on the rate at which the sample data are taken (sampling frequency)?
Thanks in advance!

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