{"id":393,"date":"2009-10-02T14:37:15","date_gmt":"2009-10-02T14:37:15","guid":{"rendered":"https:\/\/blogs.mathworks.com\/videos\/2009\/10\/02\/basics-using-accumarray\/"},"modified":"2009-10-02T14:37:15","modified_gmt":"2009-10-02T14:37:15","slug":"basics-using-accumarray","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/videos\/2009\/10\/02\/basics-using-accumarray\/","title":{"rendered":"Basics: Using ACCUMARRAY"},"content":{"rendered":"ACCUMARRAY is one of my favorite functions that I never seem to need outside of MATLAB golf problems.  I present this to you with the hopes that knowing it exists allows you to use it at just the right time.\r\n\r\nThe video discusses the following code:\r\n\r\n<pre><code>sales.rep    = [1 2 1 3 4 6 2 3 1 1];\r\nsales.amount = [1 1 3 1 5 2 2 4 1 5];\r\n\r\n\r\nnumReps = max(sales.rep);\r\nsales.total   = zeros(1,numReps);\r\nfor i = 1 : numel(sales.rep)\r\n    sales.total(sales.rep(i)) = sales.total(sales.rep(i)) ...\r\n                              + sales.amount(i);\r\nend\r\n\r\n\r\nsales.accum = accumarray(sales.rep', sales.amount)'<\/code><\/pre>\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=\"3877437980001\" 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\/2009\/10\/02\/basics-using-accumarray\/?dir=autoplay\"><img decoding=\"async\" src=\"https:\/\/cf-images.us-east-1.prod.boltdns.net\/v1\/static\/62009828001\/a5ae773e-37b2-4e56-b41b-0d5f32452a4d\/83be97f0-bb43-4d33-b0ac-1fb95b9ad423\/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\">2:56<\/time><\/span>\n      <\/div>\n      <\/a><\/div><p>ACCUMARRAY is one of my favorite functions that I never seem to need outside of MATLAB golf problems.  I present this to you with the hopes that knowing it exists allows you to use it at just the&#8230; <a class=\"read-more\" href=\"https:\/\/blogs.mathworks.com\/videos\/2009\/10\/02\/basics-using-accumarray\/\">read more >><\/a><\/p>","protected":false},"author":68,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/393"}],"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=393"}],"version-history":[{"count":0,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/393\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/media?parent=393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/categories?post=393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/tags?post=393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}