remove dc offset from a time domain data

I have a time domain signal from an oscillocope. I want to remove the dc offset in this signal. How can i perform this?
any help would be much appreciated.
I have attached the time domain file.

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There does not appear to be a DC offset. Your signal oscillates (apparently saturating the amplifier for the first three oscillations), then converges to 0 in the end.
Hi,
You can use FFT and high pass filter to block low frequency component. Follow the link given below for more information on FFT using MATLAB.

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