📄 butw.html

📁 具有特色的地震数据处理源码

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<TITLE>/</TITLE><BODY><A HREF = "../index.html">[Master Index]</A><A HREF = "index.html">[Index for ./main]</A><H1>butw</H1><H2>(./main/butw.m)</H2><HR><H3>Function Synopsis</H3><pre>[dataout]=butw(datain,low1,low2,high1,high2,Rp,Rs)</pre><HR><H3>Help text</H3><pre>[dataout]=butw(datain,low1,low2,high1,high2,Rp,Rs)Zero phase Butterworth <A HREF = "../8.main/bandpass.html">bandpass</A> filter.low1,low2,high1,high2 - frequencies describing the filterFilter is designed so that region between 'low2' and 'high1' is attenuatedby less than 3 dB and region before 'low1' and after 'high2' is attenuatedby at least 20 dB.Rp - attenuation max within pass band (dB) (around 3 dB is good)Rs - attenuation at outside frequencies (dB) (try 20 or 40)All frequencies are in Hertz (Hz)Note - uses functions from signal processing toolboxDSI customized VSP processing softwarewritten by Kristen Beaty January, 1998</pre><HR>Produced by <A HREF = "http://www.nd.edu/Courses/kantor/matlab/mat2html">mat2html</A> on Wed Jun 14 15:21:32 Canada/Eastern 2000<BR>Cross-Directory links are: ON<BR></BODY>

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