Problem about frequency filtering help me

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kohkeun
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Problem about frequency filtering help me please urgent

Homework Statement


I received sensor's volts and professor says "plot the volts ,Fourier transform, analyze data and design low pass filter"
it is attached "data.zip"
<< zip file deleted by Mentors >>
it has 4 data in matlab
1 is ploted volts
사진1.jpg

2 is transformed volts ploted
사진2-3.jpg


Homework Equations


nothing?
low pass filtering



The Attempt at a Solution


how to analyze data (find period properties and frequencys)
how to find cut off frequency
Help me please
 
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kohkeun said:

Homework Statement


I received sensor's volts and professor says "plot the volts ,Fourier transform, analyze data and design low pass filter"
it is attached "data.zip"
<< zip file deleted by Mentors >>
it has 4 data in matlab
1 is value of volts
2 is ploted volts
3 and 4 is transformed volts and ploted transformed volts



Homework Equations


nothing?
low pass filtering



The Attempt at a Solution


how to analyze data (find period properties and frequencys)
how to find cut off frequency
Help me please

Please do not post ZIP attachments. Please post in PDF or JPG formats.