Change frequency level after filter

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vu ngothanh
vu ngothanh 2015년 5월 14일
댓글: Star Strider 2015년 5월 15일
First grahp í the source data. After I filter it, I got the grahp 2. But as you can see, in the second grahp, the yelow line(I don't know how to call it) is not the same with the 0-0 line(blue). So I want to change the frequency level from 0,5 to 0. How can I do it.
Thanks in advance

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Star Strider
Star Strider 2015년 5월 14일
You seem to be using a low-pass filter. Use a bandpass filter instead, with a low-frequency cutoff that will eliminate the D-C offset (value at 0 Hz), and with the high-frequency cutoff you used in your original low-pass filter.
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Star Strider
Star Strider 2015년 5월 15일
My pleasure!

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