Calculate and plot with Matlab a frequency sweep

[silverit]

frequency sweep matlab

Hi all,

I have a problem..I have a discrete sine with 20000 sample and with variable frequency.
I need to plot this freq sweep, I expect a frequency ramp.

How I can do this with Matlab?

Please someone help me?

Thanks

 

[engr_najam]

sweep matlab

I have written some code, Hope this will work

clc
clear all

fs=40000;
t=(1:20000)/fs;
for f=1:20000
data(f)=sin(2*pi*f*t(f));
end

plot(data(1:2000))

It can be plotted well if u have given the frequency ranges, and the sampling frequency, any how u can change it ur self in the code

 

[silverit]

calculate frequency matlab

Hi,

thanks fo your support. But maybe that I explained bad.
I have a file the present the sample amplitude of the sine(trought LUT), I have attached this file.I want create a plot where in x there is a time, and in y there is a frequency. In this way i create a frequency ramp.
The sampling frequency is 400MHz

See attach for understand the concept.

Regards