processPosts({"tumblelog":{"title":"IRI Data Library What's New","description":"The <a href=\"http:\/\/iridl.ldeo.columbia.edu\/\">IRI Data Library<\/a> is a powerful and freely accessible online data repository and analysis tool that allows a user to view, analyze, and download hundreds of terabytes of climate-related data through a standard web browser.","name":"iridl","timezone":"US\/Eastern","cname":false,"feeds":[]},"posts-start":0,"posts-total":72,"posts-type":false,"posts":[{"id":"184371302826","url":"https:\/\/iridl.tumblr.com\/post\/184371302826","url-with-slug":"https:\/\/iridl.tumblr.com\/post\/184371302826\/the-butterworth-low-pass-filter-code-has-been","type":"photo","date-gmt":"2019-04-22 19:20:27 GMT","date":"Mon, 22 Apr 2019 15:20:27","bookmarklet":0,"mobile":0,"feed-item":"","from-feed-id":0,"unix-timestamp":1555960827,"format":"html","reblog-key":"HMnPzqHW","slug":"the-butterworth-low-pass-filter-code-has-been","is-submission":false,"like-button":"<div class=\"like_button\" data-post-id=\"184371302826\" data-blog-name=\"iridl\" id=\"like_button_184371302826\"><iframe id=\"like_iframe_184371302826\" src=\"https:\/\/assets.tumblr.com\/assets\/html\/like_iframe.html?_v=66c22ab5319d742bca5762b8d18f9d06#name=iridl&amp;post_id=184371302826&amp;color=black&amp;rk=HMnPzqHW\" scrolling=\"no\" width=\"20\" height=\"20\" frameborder=\"0\" class=\"like_toggle\" allowTransparency=\"true\" name=\"like_iframe_184371302826\"><\/iframe><\/div>","reblog-button":"<a href=\"https:\/\/www.tumblr.com\/reblog\/iridl\/184371302826\/HMnPzqHW\" class=\"reblog_button\"style=\"display: block;width:20px;height:20px;\"><svg width=\"100%\" height=\"100%\" viewBox=\"0 0 21 21\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" fill=\"#000\"><path d=\"M5.01092527,5.99908429 L16.0088498,5.99908429 L16.136,9.508 L20.836,4.752 L16.136,0.083 L16.1360004,3.01110845 L2.09985349,3.01110845 C1.50585349,3.01110845 0.979248041,3.44726568 0.979248041,4.45007306 L0.979248041,10.9999998 L3.98376463,8.30993634 L3.98376463,6.89801007 C3.98376463,6.20867902 4.71892527,5.99908429 5.01092527,5.99908429 Z\"><\/path><path d=\"M17.1420002,13.2800293 C17.1420002,13.5720293 17.022957,14.0490723 16.730957,14.0490723 L4.92919922,14.0490723 L4.92919922,11 L0.5,15.806 L4.92919922,20.5103758 L5.00469971,16.9990234 L18.9700928,16.9990234 C19.5640928,16.9990234 19.9453125,16.4010001 19.9453125,15.8060001 L19.9453125,9.5324707 L17.142,12.203\"><\/path><\/svg><\/a>","note-count":"0","tumblelog":{"title":"IRI Data Library What's New","name":"iridl","cname":false,"url":"https:\/\/iridl.tumblr.com\/","timezone":"US\/Eastern","avatar_url_512":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_512.png","avatar_url_128":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_128.png","avatar_url_96":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_96.png","avatar_url_64":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_64.png","avatar_url_48":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_48.png","avatar_url_40":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_40.png","avatar_url_30":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_30.png","avatar_url_24":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_24.png","avatar_url_16":"https:\/\/64.media.tumblr.com\/avatar_6be44a4be6be_16.png"},"photo-caption":"<p>The Butterworth low-pass filter code has been revisited to support time series of many points like in the example above. This comes with a more robust way of computing the solution. The 3 padding options (px &gt; 0) remain. The option not to pad (px = -1) has been replaced from taping the whole operator to taping its tailing equations only. An additional option (px = -2) now allows to do just nothing to the boundary conditions and therefore apply the Butterworth filer and the Butterworth filter only.<\/p><p>More detailed information at the function documentation:<\/p><p><a href=\"http:\/\/iridl.ldeo.columbia.edu\/dochelp\/Documentation\/details\/index.html?func=:butt_filter\">http:\/\/iridl.ldeo.columbia.edu\/dochelp\/Documentation\/details\/index.html?func=:butt_filter<\/a><\/p><p>Note that px = -1 (no padding taped solution) is the one used in the Global Time Scales Maprooms and results remain very similar.<\/p><p><a href=\"http:\/\/iridl.ldeo.columbia.edu\/maproom\/Global\/Time_Scales\/index.html\">http:\/\/iridl.ldeo.columbia.edu\/maproom\/Global\/Time_Scales\/index.html<\/a> <\/p>","photo-link-url":"http:\/\/iridl.ldeo.columbia.edu\/expert\/SOURCES\/.Indices\/.HANSEN\/.Global\/.Monthly\/.Temperature\/dup\/T\/-2\/1.\/120\/div\/butt_filter%3A\/%3Abutt_filter\/.butt\/T\/fig-\/line\/red\/line\/-fig\/#expert","width":792,"height":432,"photo-url-1280":"https:\/\/64.media.tumblr.com\/e69b535ad2926dbd36c1c28a279fbcef\/tumblr_pqdn23TSp31rvest0o1_1280.gif","photo-url-500":"https:\/\/64.media.tumblr.com\/e69b535ad2926dbd36c1c28a279fbcef\/tumblr_pqdn23TSp31rvest0o1_500.gif","photo-url-400":"https:\/\/64.media.tumblr.com\/e69b535ad2926dbd36c1c28a279fbcef\/tumblr_pqdn23TSp31rvest0o1_400.gif","photo-url-250":"https:\/\/64.media.tumblr.com\/e69b535ad2926dbd36c1c28a279fbcef\/tumblr_pqdn23TSp31rvest0o1_250.gif","photo-url-100":"https:\/\/64.media.tumblr.com\/e69b535ad2926dbd36c1c28a279fbcef\/tumblr_pqdn23TSp31rvest0o1_100.gif","photo-url-75":"https:\/\/64.media.tumblr.com\/e69b535ad2926dbd36c1c28a279fbcef\/tumblr_pqdn23TSp31rvest0o1_75sq.gif","photos":[],"tags":["butterworth","low-pass","filter","time series","boundary conditions"]}]});