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<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div><div><div>Thanks. The HowTo might help a bit.</div><div><br></div><div><div><font class="Apple-style-span" face="Helvetica"><span class="Apple-style-span" style="font-size: 12px; "><br></span></font></div><div style="font-family: Calibri, sans-serif; font-size: 14px; "><span class="Apple-style-span" style="font-family: Helvetica; font-size: medium; "><span style="font-size: 12px; ">Michael Dunn | Editor-in-Chief</span><span style="font-size: 12px; "><br></span><span style="font-size: 12px; ">Scope Junction | </span><a href="http://www.scopejunction.com/"><span style="font-size: 12px; ">http://www.scopejunction.com/</span></a><span style="font-size: 12px; "><br></span><span style="font-size: 12px; ">UBM Electronics</span><span style="font-size: 12px; "><br></span><span style="font-size: 12px; ">(415) 947-6096 (USA)</span><span style="font-size: 12px; "><br></span><span style="font-size: 12px; ">(519) 744-9395 (Canada)</span><span style="font-size: 12px; "><br></span><span style="font-size: 12px; ">Skype: MichaelDunn_UBM</span><span style="font-size: 12px; "><br></span><span style="font-size: 12px; ">LinkedIn: </span><a href="http://www.linkedin.com/in/cantares"><span style="font-size: 12px; ">http://www.linkedin.com/in/cantares</span></a></span></div><div style="font-family: Calibri, sans-serif; font-size: 14px; "><span class="Apple-style-span" style="font-size: 18px; font-family: Helvetica, sans-serif; "><img border="0" width="63" height="100" id="_x0033_b522e7d-3d1a-4753-aac9-1e15c70f751e" src="cid:FBC244D3-1696-40C9-A3D2-D532A0D2C0B4" type="image/png"></span></div><div style="font-family: Calibri, sans-serif; font-size: 14px; "><span class="Apple-style-span" style="font-size: 18px; font-family: Helvetica, sans-serif; "><br></span></div><div style="font-family: Calibri, sans-serif; font-size: 14px; "><span class="Apple-style-span" style="font-size: 18px; font-family: Helvetica, sans-serif; "><br></span></div></div></div></div><div><br></div><span id="OLK_SRC_BODY_SECTION"><div style="font-family:Calibri; font-size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><span style="font-weight:bold">From: </span> Adrien Vogt-Schilb <<a href="mailto:vogt@centre-cired.fr">vogt@centre-cired.fr</a>><br><span style="font-weight:bold">Organization: </span> Cired<br><span style="font-weight:bold">Reply-To: </span> "International users mailing list for Scilab." <<a href="mailto:users@lists.scilab.org">users@lists.scilab.org</a>><br><span style="font-weight:bold">Date: </span> Saturday, April 13, 2013 7:12 AM<br><span style="font-weight:bold">To: </span> "International users mailing list for Scilab." <<a href="mailto:users@lists.scilab.org">users@lists.scilab.org</a>><br><span style="font-weight:bold">Subject: </span> Re: [Scilab-users] Newbie filter basics<br></div><div><br></div><blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;"><div><div text="#330000" bgcolor="#FFFFFF"><div class="moz-cite-prefix">On 13/04/2013 02:49, Michael Dunn wrote:<br></div><blockquote cite="mid:CD8E20EE.90CE%25michael.dunn@ubm.com" type="cite"><div><div><div style="color: rgb(0, 0, 0); font-family: Calibri,
sans-serif; font-size: 14px; ">
Hi. Are there any resources or tutorials or references out there that would be helpful to a newbie to SciLab filtering functions? I just want to filter some data – at this point, I don't even care what kind of filter – just want to learn how!</div><div style="color: rgb(0, 0, 0); font-family: Calibri,
sans-serif; font-size: 14px; "><br></div><div style="color: rgb(0, 0, 0); font-family: Calibri,
sans-serif; font-size: 14px; ">
At first, I thought I'd try an IIR, but I couldn't figure out how to generate the coefficients.</div><div style="font-family: Calibri, sans-serif; "><pre style="font-family: Monospaced; "><span style="color: rgb(100, 174, 100); font-style: italic; ">//y = filter(num,den,x) </span></pre><pre style="font-family: Monospaced; ">Then, I stumbled onto ffilt, which seems to generate FIR coefs, but where's the actual FIR filter function? Is it "convol"? I tried this:
<span style="font-style: normal; color: rgb(174, 92, 176); text-decoration: underline; ">plot</span><span style="font-style: normal; color: rgb(74, 85, 219); ">(</span><span style="font-style: normal; color: rgb(50, 185, 185); ">fft</span><span style="font-style: normal; color: rgb(74, 85, 219); ">(</span><span style="font-style: normal; color: rgb(174, 92, 176); text-decoration: underline; ">convol</span><span style="font-style: normal; color: rgb(74, 85, 219); ">(</span><span style="font-style: normal; color: rgb(174, 92, 176); text-decoration: underline; ">ffilt</span><span style="font-style: normal; color: rgb(74, 85, 219); ">(</span><span style="font-style: normal; color: rgb(188, 143, 143); ">"</span><span style="font-style: normal; color: rgb(188, 143, 143); ">hp</span><span style="font-style: normal; color: rgb(188, 143, 143); ">"</span><span style="font-style: normal; color: rgb(0, 0, 0); ">,</span><span style="font-style: normal; color: rgb(188, 143, 143); ">40<span style="font-style: normal; color: rgb(0, 0, 0); ">,</span><span style="font-style: normal; color: rgb(188, 143, 143); ">100</span><span style="font-style: normal; color: rgb(74, 85, 219); ">)</span><span style="font-style: normal; color: rgb(0, 0, 0); ">,</span><span style="font-style: normal; color: rgb(0, 0, 0); ">r</span><span style="font-style: normal; color: rgb(74, 85, 219); ">)</span><span style="font-style: normal; color: rgb(74, 85, 219); ">)</span><span style="font-style: normal; color: rgb(74, 85, 219); ">)</span></span></pre><pre style="font-family: Monospaced; ">It does <i>something, </i>but I'm not sure what. Am I getting close?</pre><br></div></div></div></blockquote>
Hi<br><br>
I am not used ot filters, but I know there is a how to here: <a class="moz-txt-link-freetext" href="http://help.scilab.org/docs/5.4.1/en_US/DesignEllipticFilter.html">
http://help.scilab.org/docs/5.4.1/en_US/DesignEllipticFilter.html</a> (this is available in french also)<br>
from there, i suggest you navigate throught the "see also sections"<br><br>
you can also have a look here: <a class="moz-txt-link-freetext" href="http://help.scilab.org/docs/5.4.1/en_US/section_dbbac6be408104de3049eddefaf6b9c9.html">
http://help.scilab.org/docs/5.4.1/en_US/section_dbbac6be408104de3049eddefaf6b9c9.html</a><br><br>
the content of this webpage is also available in your computer, type "help" in the console and navigate.<br><br>
I hope the "how to" (1st link) will help you<br><br><br><br><br><br></div></div></blockquote></span></body></html>