MATLAB: How can i plot these problems in matlab?? I have x and y coordinate of node 3 and node 4 .

time domain vs acceleration data plot

2.The free vibration test is carried out on 2DOF building in shake table. The vibration response obtained from wireless accelerometer sensor both in x and y directions are attached for further data processing.
 Write a code in MATLAB software to,
(a) Plot the time domain acceleration data
(b) Plot the frequency domain data
(c) Estimate the first two natural frequency of a structure.
i m beginner in matlab so please help.

Best Answer

To plot the acceleration , time data you can use plot
plot(Time,acceleration)
To plot the frequency domain, you need to convert the aacceleration data to frequency. For this you have to use fft.
https://in.mathworks.com/help/matlab/ref/fft.html
After converting to frequency, you can get your required frequencies.
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