{"id":668,"date":"2012-04-17T12:59:38","date_gmt":"2012-04-17T17:59:38","guid":{"rendered":"https:\/\/blogs.mathworks.com\/videos\/?p=668"},"modified":"2012-04-17T12:59:38","modified_gmt":"2012-04-17T17:59:38","slug":"using-convolution-to-smooth-data-with-a-moving-average-in-matlab","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/videos\/2012\/04\/17\/using-convolution-to-smooth-data-with-a-moving-average-in-matlab\/","title":{"rendered":"Using convolution to smooth data with a moving average in MATLAB"},"content":{"rendered":"I teach the introduction to MATLAB classes for all new hires in the Technical Support group at MathWorks.  One of the attendees wanted to know how to do a moving average in MATLAB.  This can be useful for filtering, or smoothing, noisy data.  I realized I had never covered that on the blog, so here we go! I show how to do this from scratch using <tt>conv<\/tt>. If you have the Curve Fitting Toolbox, you might want to check out <a href=\"https:\/\/www.mathworks.com\/help\/releases\/R2012a\/toolbox\/curvefit\/smooth.html\"><tt>smooth<\/tt><\/a>, which adds some fancier smoothing methods. \r\n<p>\r\n\r\n<div><div class=\"row\"><div class=\"col-xs-12 containing-block\"><div class=\"bc-outer-container add_margin_20\"><videoplayer><div class=\"video-js-container\"><video data-video-id=\"3877436994001\" data-video-category=\"blog\" data-autostart=\"false\" data-account=\"62009828001\" data-omniture-account=\"mathwgbl\" data-player=\"rJ9XCz2Sx\" data-embed=\"default\" id=\"mathworks-brightcove-player\" class=\"video-js\" controls><\/video><script src=\"\/\/players.brightcove.net\/62009828001\/rJ9XCz2Sx_default\/index.min.js\"><\/script><script>if (typeof(playerLoaded) === 'undefined') {var playerLoaded = false;}(function isVideojsDefined() {if (typeof(videojs) !== 'undefined') {videojs(\"mathworks-brightcove-player\").on('loadedmetadata', function() {playerLoaded = true;});} else {setTimeout(isVideojsDefined, 10);}})();<\/script><\/div><\/videoplayer><\/div><\/div><\/div>\r\n <\/div>\r\n","protected":false},"excerpt":{"rendered":"<div class=\"thumbnail thumbnail_asset asset_overlay video\"><a href=\"https:\/\/blogs.mathworks.com\/videos\/2012\/04\/17\/using-convolution-to-smooth-data-with-a-moving-average-in-matlab\/?dir=autoplay\"><img decoding=\"async\" src=\"https:\/\/cf-images.us-east-1.prod.boltdns.net\/v1\/static\/62009828001\/09937f73-1707-4697-a732-2be71c2d7c5e\/98c4420d-79c4-46cb-8142-594415ddedbf\/1280x720\/match\/image.jpg\" onError=\"this.style.display ='none';\"\/>\n      <div class=\"overlay_container\">\n      <span class=\"icon-video icon_color_null\"><time class=\"video_length\">3:46<\/time><\/span>\n      <\/div>\n      <\/a><\/div><p>I teach the introduction to MATLAB classes for all new hires in the Technical Support group at MathWorks.  One of the attendees wanted to know how to do a moving average in MATLAB.  This can be&#8230; <a class=\"read-more\" href=\"https:\/\/blogs.mathworks.com\/videos\/2012\/04\/17\/using-convolution-to-smooth-data-with-a-moving-average-in-matlab\/\">read more >><\/a><\/p>","protected":false},"author":68,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,17],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/668"}],"collection":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/users\/68"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/comments?post=668"}],"version-history":[{"count":15,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/668\/revisions"}],"predecessor-version":[{"id":703,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/668\/revisions\/703"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/media?parent=668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/categories?post=668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/tags?post=668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}